/**
* Copyright 2010 The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.regionserver;
import java.io.IOException;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryUsage;
import java.lang.reflect.Constructor;
import java.net.BindException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import com.google.common.collect.Lists;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Chore;
import org.apache.hadoop.hbase.ClockOutOfSyncException;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
import org.apache.hadoop.hbase.HMsg;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HServerAddress;
import org.apache.hadoop.hbase.HServerInfo;
import org.apache.hadoop.hbase.HServerLoad;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.MasterAddressTracker;
import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.RemoteExceptionHandler;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.hbase.UnknownRowLockException;
import org.apache.hadoop.hbase.UnknownScannerException;
import org.apache.hadoop.hbase.YouAreDeadException;
import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
import org.apache.hadoop.hbase.catalog.CatalogTracker;
import org.apache.hadoop.hbase.catalog.MetaEditor;
import org.apache.hadoop.hbase.catalog.RootLocationEditor;
import org.apache.hadoop.hbase.client.Action;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HConnectionManager;
import org.apache.hadoop.hbase.client.Increment;
import org.apache.hadoop.hbase.client.MultiAction;
import org.apache.hadoop.hbase.client.MultiPut;
import org.apache.hadoop.hbase.client.MultiPutResponse;
import org.apache.hadoop.hbase.client.MultiResponse;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Row;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.executor.ExecutorService;
import org.apache.hadoop.hbase.executor.ExecutorService.ExecutorType;
import org.apache.hadoop.hbase.io.hfile.LruBlockCache;
import org.apache.hadoop.hbase.io.hfile.LruBlockCache.CacheStats;
import org.apache.hadoop.hbase.ipc.HBaseRPC;
import org.apache.hadoop.hbase.ipc.HBaseRPCErrorHandler;
import org.apache.hadoop.hbase.ipc.HBaseRPCProtocolVersion;
import org.apache.hadoop.hbase.ipc.HBaseServer;
import org.apache.hadoop.hbase.ipc.HMasterRegionInterface;
import org.apache.hadoop.hbase.ipc.HRegionInterface;
import org.apache.hadoop.hbase.ipc.ServerNotRunningException;
import org.apache.hadoop.hbase.regionserver.Leases.LeaseStillHeldException;
import org.apache.hadoop.hbase.regionserver.handler.CloseMetaHandler;
import org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler;
import org.apache.hadoop.hbase.regionserver.handler.CloseRootHandler;
import org.apache.hadoop.hbase.regionserver.handler.OpenMetaHandler;
import org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler;
import org.apache.hadoop.hbase.regionserver.handler.OpenRootHandler;
import org.apache.hadoop.hbase.regionserver.metrics.RegionServerMetrics;
import org.apache.hadoop.hbase.regionserver.wal.HLog;
import org.apache.hadoop.hbase.regionserver.wal.WALObserver;
import org.apache.hadoop.hbase.replication.regionserver.Replication;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.CompressionTest;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.InfoServer;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.Sleeper;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.zookeeper.ClusterStatusTracker;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.apache.hadoop.io.MapWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.net.DNS;
import org.apache.zookeeper.KeeperException;
import com.google.common.base.Function;
/**
* HRegionServer makes a set of HRegions available to clients. It checks in with
* the HMaster. There are many HRegionServers in a single HBase deployment.
*/
public class HRegionServer implements HRegionInterface, HBaseRPCErrorHandler,
Runnable, RegionServerServices, Server {
public static final Log LOG = LogFactory.getLog(HRegionServer.class);
// Set when a report to the master comes back with a message asking us to
// shutdown. Also set by call to stop when debugging or running unit tests
// of HRegionServer in isolation.
protected volatile boolean stopped = false;
// A state before we go into stopped state. At this stage we're closing user
// space regions.
private boolean stopping = false;
// Go down hard. Used if file system becomes unavailable and also in
// debugging and unit tests.
protected volatile boolean abortRequested;
private volatile boolean killed = false;
// If false, the file system has become unavailable
protected volatile boolean fsOk;
protected HServerInfo serverInfo;
protected final Configuration conf;
private final HConnection connection;
protected final AtomicBoolean haveRootRegion = new AtomicBoolean(false);
private FileSystem fs;
private Path rootDir;
private final Random rand = new Random();
/**
* Map of regions currently being served by this region server. Key is the
* encoded region name. All access should be synchronized.
*/
protected final Map<String, HRegion> onlineRegions =
new HashMap<String, HRegion>();
protected final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
private final LinkedBlockingQueue<HMsg> outboundMsgs = new LinkedBlockingQueue<HMsg>();
final int numRetries;
protected final int threadWakeFrequency;
private final int msgInterval;
protected final int numRegionsToReport;
private final long maxScannerResultSize;
// Remote HMaster
private HMasterRegionInterface hbaseMaster;
// Server to handle client requests. Default access so can be accessed by
// unit tests.
HBaseServer server;
// Leases
private Leases leases;
// Request counter
private volatile AtomicInteger requestCount = new AtomicInteger();
// Info server. Default access so can be used by unit tests. REGIONSERVER
// is name of the webapp and the attribute name used stuffing this instance
// into web context.
InfoServer infoServer;
/** region server process name */
public static final String REGIONSERVER = "regionserver";
/*
* Space is reserved in HRS constructor and then released when aborting to
* recover from an OOME. See HBASE-706. TODO: Make this percentage of the heap
* or a minimum.
*/
private final LinkedList<byte[]> reservedSpace = new LinkedList<byte[]>();
private RegionServerMetrics metrics;
// Compactions
CompactSplitThread compactSplitThread;
// Cache flushing
MemStoreFlusher cacheFlusher;
/*
* Check for major compactions.
*/
Chore majorCompactionChecker;
// HLog and HLog roller. log is protected rather than private to avoid
// eclipse warning when accessed by inner classes
protected volatile HLog hlog;
LogRoller hlogRoller;
// flag set after we're done setting up server threads (used for testing)
protected volatile boolean isOnline;
final Map<String, InternalScanner> scanners = new ConcurrentHashMap<String, InternalScanner>();
// zookeeper connection and watcher
private ZooKeeperWatcher zooKeeper;
// master address manager and watcher
private MasterAddressTracker masterAddressManager;
// catalog tracker
private CatalogTracker catalogTracker;
// Cluster Status Tracker
private ClusterStatusTracker clusterStatusTracker;
// A sleeper that sleeps for msgInterval.
private final Sleeper sleeper;
private final int rpcTimeout;
// The main region server thread.
@SuppressWarnings("unused")
private Thread regionServerThread;
// Instance of the hbase executor service.
private ExecutorService service;
// Replication services. If no replication, this handler will be null.
private Replication replicationHandler;
/**
* Starts a HRegionServer at the default location
*
* @param conf
* @throws IOException
* @throws InterruptedException
*/
public HRegionServer(Configuration conf) throws IOException, InterruptedException {
this.fsOk = true;
this.conf = conf;
this.connection = HConnectionManager.getConnection(conf);
this.isOnline = false;
// check to see if the codec list is available:
String [] codecs = conf.getStrings("hbase.regionserver.codecs",
(String[])null);
if (codecs != null) {
for (String codec : codecs) {
if (!CompressionTest.testCompression(codec)) {
throw new IOException("Compression codec " + codec +
" not supported, aborting RS construction");
}
}
}
// Config'ed params
this.numRetries = conf.getInt("hbase.client.retries.number", 10);
this.threadWakeFrequency = conf.getInt(HConstants.THREAD_WAKE_FREQUENCY,
10 * 1000);
this.msgInterval = conf.getInt("hbase.regionserver.msginterval", 3 * 1000);
sleeper = new Sleeper(this.msgInterval, this);
this.maxScannerResultSize = conf.getLong(
HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY,
HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE);
this.numRegionsToReport = conf.getInt(
"hbase.regionserver.numregionstoreport", 10);
this.rpcTimeout = conf.getInt(
HConstants.HBASE_RPC_TIMEOUT_KEY,
HConstants.DEFAULT_HBASE_RPC_TIMEOUT);
this.abortRequested = false;
this.stopped = false;
// Server to handle client requests
String machineName = DNS.getDefaultHost(conf.get(
"hbase.regionserver.dns.interface", "default"), conf.get(
"hbase.regionserver.dns.nameserver", "default"));
String addressStr = machineName + ":" +
conf.get(HConstants.REGIONSERVER_PORT,
Integer.toString(HConstants.DEFAULT_REGIONSERVER_PORT));
HServerAddress address = new HServerAddress(addressStr);
this.server = HBaseRPC.getServer(this,
new Class<?>[]{HRegionInterface.class, HBaseRPCErrorHandler.class,
OnlineRegions.class},
address.getBindAddress(),
address.getPort(), conf.getInt("hbase.regionserver.handler.count", 10),
conf.getInt("hbase.regionserver.metahandler.count", 10),
false, conf, QOS_THRESHOLD);
this.server.setErrorHandler(this);
this.server.setQosFunction(new QosFunction());
// HServerInfo can be amended by master. See below in reportForDuty.
this.serverInfo = new HServerInfo(new HServerAddress(new InetSocketAddress(
address.getBindAddress(), this.server.getListenerAddress().getPort())),
System.currentTimeMillis(), this.conf.getInt(
"hbase.regionserver.info.port", 60030), machineName);
if (this.serverInfo.getServerAddress() == null) {
throw new NullPointerException("Server address cannot be null; "
+ "hbase-958 debugging");
}
}
private static final int NORMAL_QOS = 0;
private static final int QOS_THRESHOLD = 10; // the line between low and high qos
private static final int HIGH_QOS = 100;
class QosFunction implements Function<Writable,Integer> {
public boolean isMetaRegion(byte[] regionName) {
HRegion region;
try {
region = getRegion(regionName);
} catch (NotServingRegionException ignored) {
return false;
}
return region.getRegionInfo().isMetaRegion();
}
@Override
public Integer apply(Writable from) {
if (!(from instanceof HBaseRPC.Invocation)) return NORMAL_QOS;
HBaseRPC.Invocation inv = (HBaseRPC.Invocation) from;
String methodName = inv.getMethodName();
// scanner methods...
if (methodName.equals("next") || methodName.equals("close")) {
// translate!
Long scannerId;
try {
scannerId = (Long) inv.getParameters()[0];
} catch (ClassCastException ignored) {
// LOG.debug("Low priority: " + from);
return NORMAL_QOS; // doh.
}
String scannerIdString = Long.toString(scannerId);
InternalScanner scanner = scanners.get(scannerIdString);
if (scanner instanceof HRegion.RegionScanner) {
HRegion.RegionScanner rs = (HRegion.RegionScanner) scanner;
HRegionInfo regionName = rs.getRegionName();
if (regionName.isMetaRegion()) {
// LOG.debug("High priority scanner request: " + scannerId);
return HIGH_QOS;
}
}
} else if (methodName.equals("getHServerInfo")
|| methodName.equals("getRegionsAssignment")
|| methodName.equals("unlockRow")
|| methodName.equals("getProtocolVersion")
|| methodName.equals("getClosestRowBefore")) {
// LOG.debug("High priority method: " + methodName);
return HIGH_QOS;
} else if (inv.getParameterClasses().length == 0) {
// Just let it through. This is getOnlineRegions, etc.
} else if (inv.getParameterClasses()[0] == byte[].class) {
// first arg is byte array, so assume this is a regionname:
if (isMetaRegion((byte[]) inv.getParameters()[0])) {
// LOG.debug("High priority with method: " + methodName +
// " and region: "
// + Bytes.toString((byte[]) inv.getParameters()[0]));
return HIGH_QOS;
}
} else if (inv.getParameterClasses()[0] == MultiAction.class) {
MultiAction ma = (MultiAction) inv.getParameters()[0];
Set<byte[]> regions = ma.getRegions();
// ok this sucks, but if any single of the actions touches a meta, the
// whole
// thing gets pingged high priority. This is a dangerous hack because
// people
// can get their multi action tagged high QOS by tossing a Get(.META.)
// AND this
// regionserver hosts META/-ROOT-
for (byte[] region : regions) {
if (isMetaRegion(region)) {
// LOG.debug("High priority multi with region: " +
// Bytes.toString(region));
return HIGH_QOS; // short circuit for the win.
}
}
}
// LOG.debug("Low priority: " + from.toString());
return NORMAL_QOS;
}
}
/**
* Creates all of the state that needs to be reconstructed in case we are
* doing a restart. This is shared between the constructor and restart(). Both
* call it.
*
* @throws IOException
* @throws InterruptedException
*/
private void initialize() throws IOException, InterruptedException {
try {
initializeZooKeeper();
initializeThreads();
int nbBlocks = conf.getInt("hbase.regionserver.nbreservationblocks", 4);
for (int i = 0; i < nbBlocks; i++) {
reservedSpace.add(new byte[HConstants.DEFAULT_SIZE_RESERVATION_BLOCK]);
}
} catch (Throwable t) {
// Call stop if error or process will stick around for ever since server
// puts up non-daemon threads.
LOG.error("Stopping HRS because failed initialize", t);
this.server.stop();
}
}
/**
* Bring up connection to zk ensemble and then wait until a master for this
* cluster and then after that, wait until cluster 'up' flag has been set.
* This is the order in which master does things.
* Finally put up a catalog tracker.
* @throws IOException
* @throws InterruptedException
*/
private void initializeZooKeeper() throws IOException, InterruptedException {
// Open connection to zookeeper and set primary watcher
zooKeeper = new ZooKeeperWatcher(conf, REGIONSERVER + ":" +
serverInfo.getServerAddress().getPort(), this);
// Create the master address manager, register with zk, and start it. Then
// block until a master is available. No point in starting up if no master
// running.
this.masterAddressManager = new MasterAddressTracker(this.zooKeeper, this);
this.masterAddressManager.start();
blockAndCheckIfStopped(this.masterAddressManager);
// Wait on cluster being up. Master will set this flag up in zookeeper
// when ready.
this.clusterStatusTracker = new ClusterStatusTracker(this.zooKeeper, this);
this.clusterStatusTracker.start();
blockAndCheckIfStopped(this.clusterStatusTracker);
// Create the catalog tracker and start it;
this.catalogTracker = new CatalogTracker(this.zooKeeper, this.connection,
this, this.conf.getInt("hbase.regionserver.catalog.timeout", Integer.MAX_VALUE));
catalogTracker.start();
}
/**
* Utilty method to wait indefinitely on a znode availability while checking
* if the region server is shut down
* @param tracker znode tracker to use
* @throws IOException any IO exception, plus if the RS is stopped
* @throws InterruptedException
*/
private void blockAndCheckIfStopped(ZooKeeperNodeTracker tracker)
throws IOException, InterruptedException {
while (tracker.blockUntilAvailable(this.msgInterval) == null) {
if (this.stopped) {
throw new IOException("Received the shutdown message while waiting.");
}
}
}
/**
* @return False if cluster shutdown in progress
*/
private boolean isClusterUp() {
return this.clusterStatusTracker.isClusterUp();
}
private void initializeThreads() throws IOException {
// Cache flushing thread.
this.cacheFlusher = new MemStoreFlusher(conf, this);
// Compaction thread
this.compactSplitThread = new CompactSplitThread(this);
// Background thread to check for major compactions; needed if region
// has not gotten updates in a while. Make it run at a lesser frequency.
int multiplier = this.conf.getInt(HConstants.THREAD_WAKE_FREQUENCY
+ ".multiplier", 1000);
this.majorCompactionChecker = new MajorCompactionChecker(this,
this.threadWakeFrequency * multiplier, this);
this.leases = new Leases((int) conf.getLong(
HConstants.HBASE_REGIONSERVER_LEASE_PERIOD_KEY,
HConstants.DEFAULT_HBASE_REGIONSERVER_LEASE_PERIOD),
this.threadWakeFrequency);
}
/**
* The HRegionServer sticks in this loop until closed. It repeatedly checks in
* with the HMaster, sending heartbeats & reports, and receiving HRegion
* load/unload instructions.
*/
public void run() {
try {
// Initialize threads and wait for a master
initialize();
} catch (Exception e) {
abort("Fatal exception during initialization", e);
}
this.regionServerThread = Thread.currentThread();
try {
while (!this.stopped) {
if (tryReportForDuty()) break;
}
long lastMsg = 0;
List<HMsg> outboundMessages = new ArrayList<HMsg>();
// The main run loop.
for (int tries = 0; !this.stopped && isHealthy();) {
if (!isClusterUp()) {
if (isOnlineRegionsEmpty()) {
stop("Exiting; cluster shutdown set and not carrying any regions");
} else if (!this.stopping) {
this.stopping = true;
closeUserRegions(this.abortRequested);
} else if (this.stopping && LOG.isDebugEnabled()) {
LOG.debug("Waiting on " + getOnlineRegionsAsPrintableString());
}
}
long now = System.currentTimeMillis();
// Drop into the send loop if msgInterval has elapsed or if something
// to send. If we fail talking to the master, then we'll sleep below
// on poll of the outboundMsgs blockingqueue.
if ((now - lastMsg) >= msgInterval || !outboundMessages.isEmpty()) {
try {
doMetrics();
tryRegionServerReport(outboundMessages);
lastMsg = System.currentTimeMillis();
// Reset tries count if we had a successful transaction.
tries = 0;
if (this.stopped) continue;
} catch (Exception e) { // FindBugs REC_CATCH_EXCEPTION
// Two special exceptions could be printed out here,
// PleaseHoldException and YouAreDeadException
if (e instanceof IOException) {
e = RemoteExceptionHandler.checkIOException((IOException) e);
}
if (e instanceof YouAreDeadException) {
// This will be caught and handled as a fatal error below
throw e;
}
tries++;
if (tries > 0 && (tries % this.numRetries) == 0) {
// Check filesystem every so often.
checkFileSystem();
}
if (this.stopped) {
continue;
}
LOG.warn("Attempt=" + tries, e);
// No point retrying immediately; this is probably connection to
// master issue. Doing below will cause us to sleep.
lastMsg = System.currentTimeMillis();
}
}
now = System.currentTimeMillis();
HMsg msg = this.outboundMsgs.poll((msgInterval - (now - lastMsg)), TimeUnit.MILLISECONDS);
if (msg != null) outboundMessages.add(msg);
} // for
} catch (Throwable t) {
if (!checkOOME(t)) {
abort("Unhandled exception: " + t.getMessage(), t);
}
}
this.leases.closeAfterLeasesExpire();
this.server.stop();
if (this.infoServer != null) {
LOG.info("Stopping infoServer");
try {
this.infoServer.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
// Send cache a shutdown.
LruBlockCache c = (LruBlockCache) StoreFile.getBlockCache(this.conf);
if (c != null) {
c.shutdown();
}
// Send interrupts to wake up threads if sleeping so they notice shutdown.
// TODO: Should we check they are alive? If OOME could have exited already
if (this.cacheFlusher != null) this.cacheFlusher.interruptIfNecessary();
if (this.compactSplitThread != null) this.compactSplitThread.interruptIfNecessary();
if (this.hlogRoller != null) this.hlogRoller.interruptIfNecessary();
if (this.majorCompactionChecker != null) this.majorCompactionChecker.interrupt();
if (this.killed) {
// Just skip out w/o closing regions.
} else if (abortRequested) {
if (this.fsOk) {
closeAllRegions(abortRequested); // Don't leave any open file handles
closeWAL(false);
}
LOG.info("aborting server at: " + this.serverInfo.getServerName());
} else {
closeAllRegions(abortRequested);
closeWAL(true);
closeAllScanners();
LOG.info("stopping server at: " + this.serverInfo.getServerName());
}
// Interrupt catalog tracker here in case any regions being opened out in
// handlers are stuck waiting on meta or root.
if (this.catalogTracker != null) this.catalogTracker.stop();
waitOnAllRegionsToClose();
// Make sure the proxy is down.
if (this.hbaseMaster != null) {
HBaseRPC.stopProxy(this.hbaseMaster);
this.hbaseMaster = null;
}
this.leases.close();
HConnectionManager.deleteConnection(conf, true);
this.zooKeeper.close();
if (!killed) {
join();
}
LOG.info(Thread.currentThread().getName() + " exiting");
}
String getOnlineRegionsAsPrintableString() {
StringBuilder sb = new StringBuilder();
synchronized (this.onlineRegions) {
for (HRegion r: this.onlineRegions.values()) {
if (sb.length() > 0) sb.append(", ");
sb.append(r.getRegionInfo().getEncodedName());
}
}
return sb.toString();
}
/**
* Wait on regions close.
*/
private void waitOnAllRegionsToClose() {
// Wait till all regions are closed before going out.
int lastCount = -1;
while (!isOnlineRegionsEmpty()) {
int count = getNumberOfOnlineRegions();
// Only print a message if the count of regions has changed.
if (count != lastCount) {
lastCount = count;
LOG.info("Waiting on " + count + " regions to close");
// Only print out regions still closing if a small number else will
// swamp the log.
if (count < 10 && LOG.isDebugEnabled()) {
synchronized (this.onlineRegions) {
LOG.debug(this.onlineRegions);
}
}
}
Threads.sleep(1000);
}
}
List<HMsg> tryRegionServerReport(final List<HMsg> outboundMessages)
throws IOException {
this.serverInfo.setLoad(buildServerLoad());
this.requestCount.set(0);
addOutboundMsgs(outboundMessages);
HMsg [] msgs = null;
while (!this.stopped) {
try {
msgs = this.hbaseMaster.regionServerReport(this.serverInfo,
outboundMessages.toArray(HMsg.EMPTY_HMSG_ARRAY),
getMostLoadedRegions());
break;
} catch (IOException ioe) {
if (ioe instanceof RemoteException) {
ioe = ((RemoteException)ioe).unwrapRemoteException();
}
if (ioe instanceof YouAreDeadException) {
// This will be caught and handled as a fatal error in run()
throw ioe;
}
// Couldn't connect to the master, get location from zk and reconnect
// Method blocks until new master is found or we are stopped
getMaster();
}
}
updateOutboundMsgs(outboundMessages);
outboundMessages.clear();
for (int i = 0; !this.stopped && msgs != null && i < msgs.length; i++) {
LOG.info(msgs[i].toString());
// Intercept stop regionserver messages
if (msgs[i].getType().equals(HMsg.Type.STOP_REGIONSERVER)) {
stop("Received " + msgs[i]);
continue;
}
LOG.warn("NOT PROCESSING " + msgs[i] + " -- WHY IS MASTER SENDING IT TO US?");
}
return outboundMessages;
}
private HServerLoad buildServerLoad() {
MemoryUsage memory = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
HServerLoad hsl = new HServerLoad(requestCount.get(),
(int)(memory.getUsed() / 1024 / 1024),
(int) (memory.getMax() / 1024 / 1024));
synchronized (this.onlineRegions) {
for (HRegion r : this.onlineRegions.values()) {
hsl.addRegionInfo(createRegionLoad(r));
}
}
return hsl;
}
private void closeWAL(final boolean delete) {
try {
if (this.hlog != null) {
if (delete) {
hlog.closeAndDelete();
} else {
hlog.close();
}
}
} catch (Throwable e) {
LOG.error("Close and delete failed", RemoteExceptionHandler.checkThrowable(e));
}
}
private void closeAllScanners() {
// Close any outstanding scanners. Means they'll get an UnknownScanner
// exception next time they come in.
for (Map.Entry<String, InternalScanner> e : this.scanners.entrySet()) {
try {
e.getValue().close();
} catch (IOException ioe) {
LOG.warn("Closing scanner " + e.getKey(), ioe);
}
}
}
/*
* Add to the passed <code>msgs</code> messages to pass to the master.
*
* @param msgs Current outboundMsgs array; we'll add messages to this List.
*/
private void addOutboundMsgs(final List<HMsg> msgs) {
if (msgs.isEmpty()) {
this.outboundMsgs.drainTo(msgs);
return;
}
OUTER: for (HMsg m : this.outboundMsgs) {
for (HMsg mm : msgs) {
// Be careful don't add duplicates.
if (mm.equals(m)) {
continue OUTER;
}
}
msgs.add(m);
}
}
/*
* Remove from this.outboundMsgs those messsages we sent the master.
*
* @param msgs Messages we sent the master.
*/
private void updateOutboundMsgs(final List<HMsg> msgs) {
if (msgs.isEmpty()) {
return;
}
for (HMsg m : this.outboundMsgs) {
for (HMsg mm : msgs) {
if (mm.equals(m)) {
this.outboundMsgs.remove(m);
break;
}
}
}
}
/*
* Run init. Sets up hlog and starts up all server threads.
*
* @param c Extra configuration.
*/
protected void handleReportForDutyResponse(final MapWritable c) throws IOException {
try {
for (Map.Entry<Writable, Writable> e : c.entrySet()) {
String key = e.getKey().toString();
// Use the address the master passed us
if (key.equals("hbase.regionserver.address")) {
HServerAddress hsa = (HServerAddress) e.getValue();
LOG.info("Master passed us address to use. Was="
+ this.serverInfo.getServerAddress() + ", Now=" + hsa.toString());
this.serverInfo.setServerAddress(hsa);
continue;
}
String value = e.getValue().toString();
if (LOG.isDebugEnabled()) {
LOG.debug("Config from master: " + key + "=" + value);
}
this.conf.set(key, value);
}
// hack! Maps DFSClient => RegionServer for logs. HDFS made this
// config param for task trackers, but we can piggyback off of it.
if (this.conf.get("mapred.task.id") == null) {
this.conf.set("mapred.task.id",
"hb_rs_" + this.serverInfo.getServerName() + "_" +
System.currentTimeMillis());
}
// Master sent us hbase.rootdir to use. Should be fully qualified
// path with file system specification included. Set 'fs.defaultFS'
// to match the filesystem on hbase.rootdir else underlying hadoop hdfs
// accessors will be going against wrong filesystem (unless all is set
// to defaults).
this.conf.set("fs.defaultFS", this.conf.get("hbase.rootdir"));
// Get fs instance used by this RS
this.fs = FileSystem.get(this.conf);
this.rootDir = new Path(this.conf.get(HConstants.HBASE_DIR));
this.hlog = setupWALAndReplication();
// Init in here rather than in constructor after thread name has been set
this.metrics = new RegionServerMetrics();
startServiceThreads();
LOG.info("Serving as " + this.serverInfo.getServerName() +
", RPC listening on " + this.server.getListenerAddress() +
", sessionid=0x" +
Long.toHexString(this.zooKeeper.getZooKeeper().getSessionId()));
isOnline = true;
} catch (Throwable e) {
this.isOnline = false;
stop("Failed initialization");
throw convertThrowableToIOE(cleanup(e, "Failed init"),
"Region server startup failed");
}
}
/*
* @param r Region to get RegionLoad for.
*
* @return RegionLoad instance.
*
* @throws IOException
*/
private HServerLoad.RegionLoad createRegionLoad(final HRegion r) {
byte[] name = r.getRegionName();
int stores = 0;
int storefiles = 0;
int storefileSizeMB = 0;
int memstoreSizeMB = (int) (r.memstoreSize.get() / 1024 / 1024);
int storefileIndexSizeMB = 0;
synchronized (r.stores) {
stores += r.stores.size();
for (Store store : r.stores.values()) {
storefiles += store.getStorefilesCount();
storefileSizeMB += (int) (store.getStorefilesSize() / 1024 / 1024);
storefileIndexSizeMB += (int) (store.getStorefilesIndexSize() / 1024 / 1024);
}
}
return new HServerLoad.RegionLoad(name, stores, storefiles,
storefileSizeMB, memstoreSizeMB, storefileIndexSizeMB);
}
/**
* @param encodedRegionName
* @return An instance of RegionLoad.
* @throws IOException
*/
public HServerLoad.RegionLoad createRegionLoad(final String encodedRegionName) {
HRegion r = null;
synchronized (this.onlineRegions) {
r = this.onlineRegions.get(encodedRegionName);
}
return createRegionLoad(r);
}
/*
* Cleanup after Throwable caught invoking method. Converts <code>t</code> to
* IOE if it isn't already.
*
* @param t Throwable
*
* @return Throwable converted to an IOE; methods can only let out IOEs.
*/
private Throwable cleanup(final Throwable t) {
return cleanup(t, null);
}
/*
* Cleanup after Throwable caught invoking method. Converts <code>t</code> to
* IOE if it isn't already.
*
* @param t Throwable
*
* @param msg Message to log in error. Can be null.
*
* @return Throwable converted to an IOE; methods can only let out IOEs.
*/
private Throwable cleanup(final Throwable t, final String msg) {
// Don't log as error if NSRE; NSRE is 'normal' operation.
if (t instanceof NotServingRegionException) {
LOG.debug("NotServingRegionException; " + t.getMessage());
return t;
}
if (msg == null) {
LOG.error("", RemoteExceptionHandler.checkThrowable(t));
} else {
LOG.error(msg, RemoteExceptionHandler.checkThrowable(t));
}
if (!checkOOME(t)) {
checkFileSystem();
}
return t;
}
/*
* @param t
*
* @return Make <code>t</code> an IOE if it isn't already.
*/
private IOException convertThrowableToIOE(final Throwable t) {
return convertThrowableToIOE(t, null);
}
/*
* @param t
*
* @param msg Message to put in new IOE if passed <code>t</code> is not an IOE
*
* @return Make <code>t</code> an IOE if it isn't already.
*/
private IOException convertThrowableToIOE(final Throwable t, final String msg) {
return (t instanceof IOException ? (IOException) t : msg == null
|| msg.length() == 0 ? new IOException(t) : new IOException(msg, t));
}
/*
* Check if an OOME and if so, call abort.
*
* @param e
*
* @return True if we OOME'd and are aborting.
*/
public boolean checkOOME(final Throwable e) {
boolean stop = false;
if (e instanceof OutOfMemoryError
|| (e.getCause() != null && e.getCause() instanceof OutOfMemoryError)
|| (e.getMessage() != null && e.getMessage().contains(
"java.lang.OutOfMemoryError"))) {
abort("OutOfMemoryError, aborting", e);
stop = true;
}
return stop;
}
/**
* Checks to see if the file system is still accessible. If not, sets
* abortRequested and stopRequested
*
* @return false if file system is not available
*/
protected boolean checkFileSystem() {
if (this.fsOk && this.fs != null) {
try {
FSUtils.checkFileSystemAvailable(this.fs);
} catch (IOException e) {
abort("File System not available", e);
this.fsOk = false;
}
}
return this.fsOk;
}
/*
* Inner class that runs on a long period checking if regions need major
* compaction.
*/
private static class MajorCompactionChecker extends Chore {
private final HRegionServer instance;
MajorCompactionChecker(final HRegionServer h, final int sleepTime,
final Stoppable stopper) {
super("MajorCompactionChecker", sleepTime, h);
this.instance = h;
LOG.info("Runs every " + sleepTime + "ms");
}
@Override
protected void chore() {
synchronized (this.instance.onlineRegions) {
for (HRegion r : this.instance.onlineRegions.values()) {
try {
if (r != null && r.isMajorCompaction()) {
// Queue a compaction. Will recognize if major is needed.
this.instance.compactSplitThread.requestCompaction(r, getName()
+ " requests major compaction");
}
} catch (IOException e) {
LOG.warn("Failed major compaction check on " + r, e);
}
}
}
}
}
/**
* Report the status of the server. A server is online once all the startup is
* completed (setting up filesystem, starting service threads, etc.). This
* method is designed mostly to be useful in tests.
*
* @return true if online, false if not.
*/
public boolean isOnline() {
return isOnline;
}
/**
* Setup WAL log and replication if enabled.
* Replication setup is done in here because it wants to be hooked up to WAL.
* @return A WAL instance.
* @throws IOException
*/
private HLog setupWALAndReplication() throws IOException {
final Path oldLogDir = new Path(rootDir, HConstants.HREGION_OLDLOGDIR_NAME);
Path logdir = new Path(rootDir, HLog.getHLogDirectoryName(this.serverInfo));
if (LOG.isDebugEnabled()) {
LOG.debug("logdir=" + logdir);
}
if (this.fs.exists(logdir)) {
throw new RegionServerRunningException("Region server already "
+ "running at " + this.serverInfo.getServerName()
+ " because logdir " + logdir.toString() + " exists");
}
// Instantiate replication manager if replication enabled. Pass it the
// log directories.
try {
this.replicationHandler = Replication.isReplication(this.conf)?
new Replication(this, this.fs, logdir, oldLogDir): null;
} catch (KeeperException e) {
throw new IOException("Failed replication handler create", e);
}
return instantiateHLog(logdir, oldLogDir);
}
/**
* Called by {@link #setupWALAndReplication()} creating WAL instance.
* @param logdir
* @param oldLogDir
* @return WAL instance.
* @throws IOException
*/
protected HLog instantiateHLog(Path logdir, Path oldLogDir) throws IOException {
return new HLog(this.fs, logdir, oldLogDir, this.conf,
getWALActionListeners(), this.serverInfo.getServerAddress().toString());
}
/**
* Called by {@link #instantiateHLog(Path, Path)} setting up WAL instance.
* Add any {@link WALObserver}s you want inserted before WAL startup.
* @return List of WALActionsListener that will be passed in to
* {@link HLog} on construction.
*/
protected List<WALObserver> getWALActionListeners() {
List<WALObserver> listeners = new ArrayList<WALObserver>();
// Log roller.
this.hlogRoller = new LogRoller(this, this);
listeners.add(this.hlogRoller);
if (this.replicationHandler != null) {
// Replication handler is an implementation of WALActionsListener.
listeners.add(this.replicationHandler);
}
return listeners;
}
protected LogRoller getLogRoller() {
return hlogRoller;
}
/*
* @param interval Interval since last time metrics were called.
*/
protected void doMetrics() {
try {
metrics();
} catch (Throwable e) {
LOG.warn("Failed metrics", e);
}
}
protected void metrics() {
this.metrics.regions.set(this.onlineRegions.size());
this.metrics.incrementRequests(this.requestCount.get());
// Is this too expensive every three seconds getting a lock on onlineRegions
// and then per store carried? Can I make metrics be sloppier and avoid
// the synchronizations?
int stores = 0;
int storefiles = 0;
long memstoreSize = 0;
long storefileIndexSize = 0;
synchronized (this.onlineRegions) {
for (Map.Entry<String, HRegion> e : this.onlineRegions.entrySet()) {
HRegion r = e.getValue();
memstoreSize += r.memstoreSize.get();
synchronized (r.stores) {
stores += r.stores.size();
for (Map.Entry<byte[], Store> ee : r.stores.entrySet()) {
Store store = ee.getValue();
storefiles += store.getStorefilesCount();
storefileIndexSize += store.getStorefilesIndexSize();
}
}
}
}
this.metrics.stores.set(stores);
this.metrics.storefiles.set(storefiles);
this.metrics.memstoreSizeMB.set((int) (memstoreSize / (1024 * 1024)));
this.metrics.storefileIndexSizeMB
.set((int) (storefileIndexSize / (1024 * 1024)));
this.metrics.compactionQueueSize.set(compactSplitThread
.getCompactionQueueSize());
LruBlockCache lruBlockCache = (LruBlockCache) StoreFile.getBlockCache(conf);
if (lruBlockCache != null) {
this.metrics.blockCacheCount.set(lruBlockCache.size());
this.metrics.blockCacheFree.set(lruBlockCache.getFreeSize());
this.metrics.blockCacheSize.set(lruBlockCache.getCurrentSize());
CacheStats cacheStats = lruBlockCache.getStats();
this.metrics.blockCacheHitCount.set(cacheStats.getHitCount());
this.metrics.blockCacheMissCount.set(cacheStats.getMissCount());
this.metrics.blockCacheEvictedCount.set(lruBlockCache.getEvictedCount());
double ratio = lruBlockCache.getStats().getHitRatio();
int percent = (int) (ratio * 100);
this.metrics.blockCacheHitRatio.set(percent);
ratio = lruBlockCache.getStats().getHitCachingRatio();
percent = (int) (ratio * 100);
this.metrics.blockCacheHitCachingRatio.set(percent);
}
}
/**
* @return Region server metrics instance.
*/
public RegionServerMetrics getMetrics() {
return this.metrics;
}
/*
* Start maintanence Threads, Server, Worker and lease checker threads.
* Install an UncaughtExceptionHandler that calls abort of RegionServer if we
* get an unhandled exception. We cannot set the handler on all threads.
* Server's internal Listener thread is off limits. For Server, if an OOME, it
* waits a while then retries. Meantime, a flush or a compaction that tries to
* run should trigger same critical condition and the shutdown will run. On
* its way out, this server will shut down Server. Leases are sort of
* inbetween. It has an internal thread that while it inherits from Chore, it
* keeps its own internal stop mechanism so needs to be stopped by this
* hosting server. Worker logs the exception and exits.
*/
private void startServiceThreads() throws IOException {
String n = Thread.currentThread().getName();
UncaughtExceptionHandler handler = new UncaughtExceptionHandler() {
public void uncaughtException(Thread t, Throwable e) {
abort("Uncaught exception in service thread " + t.getName(), e);
}
};
// Start executor services
this.service = new ExecutorService(getServerName());
this.service.startExecutorService(ExecutorType.RS_OPEN_REGION,
conf.getInt("hbase.regionserver.executor.openregion.threads", 3));
this.service.startExecutorService(ExecutorType.RS_OPEN_ROOT,
conf.getInt("hbase.regionserver.executor.openroot.threads", 1));
this.service.startExecutorService(ExecutorType.RS_OPEN_META,
conf.getInt("hbase.regionserver.executor.openmeta.threads", 1));
this.service.startExecutorService(ExecutorType.RS_CLOSE_REGION,
conf.getInt("hbase.regionserver.executor.closeregion.threads", 3));
this.service.startExecutorService(ExecutorType.RS_CLOSE_ROOT,
conf.getInt("hbase.regionserver.executor.closeroot.threads", 1));
this.service.startExecutorService(ExecutorType.RS_CLOSE_META,
conf.getInt("hbase.regionserver.executor.closemeta.threads", 1));
Threads.setDaemonThreadRunning(this.hlogRoller, n + ".logRoller", handler);
Threads.setDaemonThreadRunning(this.cacheFlusher, n + ".cacheFlusher",
handler);
Threads.setDaemonThreadRunning(this.compactSplitThread, n + ".compactor",
handler);
Threads.setDaemonThreadRunning(this.majorCompactionChecker, n
+ ".majorCompactionChecker", handler);
// Leases is not a Thread. Internally it runs a daemon thread. If it gets
// an unhandled exception, it will just exit.
this.leases.setName(n + ".leaseChecker");
this.leases.start();
// Put up info server.
int port = this.conf.getInt("hbase.regionserver.info.port", 60030);
// -1 is for disabling info server
if (port >= 0) {
String addr = this.conf.get("hbase.regionserver.info.bindAddress",
"0.0.0.0");
// check if auto port bind enabled
boolean auto = this.conf.getBoolean("hbase.regionserver.info.port.auto",
false);
while (true) {
try {
this.infoServer = new InfoServer("regionserver", addr, port, false);
this.infoServer.setAttribute("regionserver", this);
this.infoServer.start();
break;
} catch (BindException e) {
if (!auto) {
// auto bind disabled throw BindException
throw e;
}
// auto bind enabled, try to use another port
LOG.info("Failed binding http info server to port: " + port);
port++;
// update HRS server info port.
this.serverInfo = new HServerInfo(this.serverInfo.getServerAddress(),
this.serverInfo.getStartCode(), port,
this.serverInfo.getHostname());
}
}
}
if (this.replicationHandler != null) {
this.replicationHandler.startReplicationServices();
}
// Start Server. This service is like leases in that it internally runs
// a thread.
this.server.start();
}
/*
* Verify that server is healthy
*/
private boolean isHealthy() {
if (!fsOk) {
// File system problem
return false;
}
// Verify that all threads are alive
if (!(leases.isAlive() && compactSplitThread.isAlive()
&& cacheFlusher.isAlive() && hlogRoller.isAlive()
&& this.majorCompactionChecker.isAlive())) {
stop("One or more threads are no longer alive -- stop");
return false;
}
return true;
}
@Override
public HLog getWAL() {
return this.hlog;
}
@Override
public CatalogTracker getCatalogTracker() {
return this.catalogTracker;
}
@Override
public void stop(final String msg) {
this.stopped = true;
LOG.info("STOPPED: " + msg);
synchronized (this) {
// Wakes run() if it is sleeping
notifyAll(); // FindBugs NN_NAKED_NOTIFY
}
}
@Override
public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct,
final boolean daughter)
throws KeeperException, IOException {
// Do checks to see if we need to compact (references or too many files)
if (r.hasReferences() || r.hasTooManyStoreFiles()) {
getCompactionRequester().requestCompaction(r,
r.hasReferences()? "Region has references on open" :
"Region has too many store files");
}
// Add to online regions if all above was successful.
addToOnlineRegions(r);
// Update ZK, ROOT or META
if (r.getRegionInfo().isRootRegion()) {
RootLocationEditor.setRootLocation(getZooKeeper(),
getServerInfo().getServerAddress());
} else if (r.getRegionInfo().isMetaRegion()) {
MetaEditor.updateMetaLocation(ct, r.getRegionInfo(), getServerInfo());
} else {
if (daughter) {
// If daughter of a split, update whole row, not just location.
MetaEditor.addDaughter(ct, r.getRegionInfo(), getServerInfo());
} else {
MetaEditor.updateRegionLocation(ct, r.getRegionInfo(), getServerInfo());
}
}
}
/**
* Cause the server to exit without closing the regions it is serving, the log
* it is using and without notifying the master. Used unit testing and on
* catastrophic events such as HDFS is yanked out from under hbase or we OOME.
*
* @param reason
* the reason we are aborting
* @param cause
* the exception that caused the abort, or null
*/
public void abort(String reason, Throwable cause) {
if (cause != null) {
LOG.fatal("ABORTING region server " + this + ": " + reason, cause);
} else {
LOG.fatal("ABORTING region server " + this + ": " + reason);
}
this.abortRequested = true;
this.reservedSpace.clear();
if (this.metrics != null) {
LOG.info("Dump of metrics: " + this.metrics);
}
stop(reason);
}
/**
* @see HRegionServer#abort(String, Throwable)
*/
public void abort(String reason) {
abort(reason, null);
}
/*
* Simulate a kill -9 of this server. Exits w/o closing regions or cleaninup
* logs but it does close socket in case want to bring up server on old
* hostname+port immediately.
*/
protected void kill() {
this.killed = true;
abort("Simulated kill");
}
/**
* Wait on all threads to finish. Presumption is that all closes and stops
* have already been called.
*/
protected void join() {
Threads.shutdown(this.majorCompactionChecker);
Threads.shutdown(this.cacheFlusher);
Threads.shutdown(this.compactSplitThread);
Threads.shutdown(this.hlogRoller);
this.service.shutdown();
if (this.replicationHandler != null) {
this.replicationHandler.join();
}
}
/**
* Get the current master from ZooKeeper and open the RPC connection to it.
*
* Method will block until a master is available. You can break from this
* block by requesting the server stop.
*
* @return master address, or null if server has been stopped
*/
private HServerAddress getMaster() {
HServerAddress masterAddress = null;
while ((masterAddress = masterAddressManager.getMasterAddress()) == null) {
if (stopped) {
return null;
}
LOG.debug("No master found, will retry");
sleeper.sleep();
}
HMasterRegionInterface master = null;
while (!stopped && master == null) {
try {
// Do initial RPC setup. The final argument indicates that the RPC
// should retry indefinitely.
master = (HMasterRegionInterface) HBaseRPC.waitForProxy(
HMasterRegionInterface.class, HBaseRPCProtocolVersion.versionID,
masterAddress.getInetSocketAddress(), this.conf, -1,
this.rpcTimeout, this.rpcTimeout);
} catch (IOException e) {
e = e instanceof RemoteException ?
((RemoteException)e).unwrapRemoteException() : e;
if (e instanceof ServerNotRunningException) {
LOG.info("Master isn't available yet, retrying");
} else {
LOG.warn("Unable to connect to master. Retrying. Error was:", e);
}
sleeper.sleep();
}
}
LOG.info("Connected to master at " + masterAddress);
this.hbaseMaster = master;
return masterAddress;
}
/**
* @return True if successfully invoked {@link #reportForDuty()}
* @throws IOException
*/
private boolean tryReportForDuty() throws IOException {
MapWritable w = reportForDuty();
if (w != null) {
handleReportForDutyResponse(w);
return true;
}
sleeper.sleep();
LOG.warn("No response on reportForDuty. Sleeping and then retrying.");
return false;
}
/*
* Let the master know we're here Run initialization using parameters passed
* us by the master.
*/
private MapWritable reportForDuty() throws IOException {
HServerAddress masterAddress = null;
while (!stopped && (masterAddress = getMaster()) == null) {
sleeper.sleep();
LOG.warn("Unable to get master for initialization");
}
MapWritable result = null;
long lastMsg = 0;
while (!stopped) {
try {
this.requestCount.set(0);
lastMsg = System.currentTimeMillis();
ZKUtil.setAddressAndWatch(zooKeeper,
ZKUtil.joinZNode(zooKeeper.rsZNode, ZKUtil.getNodeName(serverInfo)),
this.serverInfo.getServerAddress());
this.serverInfo.setLoad(buildServerLoad());
LOG.info("Telling master at " + masterAddress + " that we are up");
result = this.hbaseMaster.regionServerStartup(this.serverInfo,
EnvironmentEdgeManager.currentTimeMillis());
break;
} catch (RemoteException e) {
IOException ioe = e.unwrapRemoteException();
if (ioe instanceof ClockOutOfSyncException) {
LOG.fatal("Master rejected startup because clock is out of sync",
ioe);
// Re-throw IOE will cause RS to abort
throw ioe;
} else {
LOG.warn("remote error telling master we are up", e);
}
} catch (IOException e) {
LOG.warn("error telling master we are up", e);
} catch (KeeperException e) {
LOG.warn("error putting up ephemeral node in zookeeper", e);
}
sleeper.sleep(lastMsg);
}
return result;
}
/**
* Add to the outbound message buffer
*
* When a region splits, we need to tell the master that there are two new
* regions that need to be assigned.
*
* We do not need to inform the master about the old region, because we've
* updated the meta or root regions, and the master will pick that up on its
* next rescan of the root or meta tables.
*/
void reportSplit(HRegionInfo oldRegion, HRegionInfo newRegionA,
HRegionInfo newRegionB) {
this.outboundMsgs.add(new HMsg(
HMsg.Type.REGION_SPLIT, oldRegion, newRegionA,
newRegionB, Bytes.toBytes("Daughters; "
+ newRegionA.getRegionNameAsString() + ", "
+ newRegionB.getRegionNameAsString())));
}
/**
* Closes all regions. Called on our way out.
* Assumes that its not possible for new regions to be added to onlineRegions
* while this method runs.
*/
protected void closeAllRegions(final boolean abort) {
closeUserRegions(abort);
// Only root and meta should remain. Are we carrying root or meta?
HRegion meta = null;
HRegion root = null;
this.lock.writeLock().lock();
try {
synchronized (this.onlineRegions) {
for (Map.Entry<String, HRegion> e: onlineRegions.entrySet()) {
HRegionInfo hri = e.getValue().getRegionInfo();
if (hri.isRootRegion()) {
root = e.getValue();
} else if (hri.isMetaRegion()) {
meta = e.getValue();
}
if (meta != null && root != null) break;
}
}
} finally {
this.lock.writeLock().unlock();
}
if (meta != null) closeRegion(meta.getRegionInfo(), abort, false);
if (root != null) closeRegion(root.getRegionInfo(), abort, false);
}
/**
* Schedule closes on all user regions.
* @param abort Whether we're running an abort.
*/
void closeUserRegions(final boolean abort) {
this.lock.writeLock().lock();
try {
synchronized (this.onlineRegions) {
for (Map.Entry<String, HRegion> e: this.onlineRegions.entrySet()) {
HRegion r = e.getValue();
if (!r.getRegionInfo().isMetaRegion()) {
// Don't update zk with this close transition; pass false.
closeRegion(r.getRegionInfo(), abort, false);
}
}
}
} finally {
this.lock.writeLock().unlock();
}
}
@Override
public HRegionInfo getRegionInfo(final byte[] regionName)
throws NotServingRegionException {
requestCount.incrementAndGet();
return getRegion(regionName).getRegionInfo();
}
public Result getClosestRowBefore(final byte[] regionName, final byte[] row,
final byte[] family) throws IOException {
checkOpen();
requestCount.incrementAndGet();
try {
// locate the region we're operating on
HRegion region = getRegion(regionName);
// ask the region for all the data
Result r = region.getClosestRowBefore(row, family);
return r;
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
/** {@inheritDoc} */
public Result get(byte[] regionName, Get get) throws IOException {
checkOpen();
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
return region.get(get, getLockFromId(get.getLockId()));
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
public boolean exists(byte[] regionName, Get get) throws IOException {
checkOpen();
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
Result r = region.get(get, getLockFromId(get.getLockId()));
return r != null && !r.isEmpty();
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
public void put(final byte[] regionName, final Put put) throws IOException {
if (put.getRow() == null) {
throw new IllegalArgumentException("update has null row");
}
checkOpen();
this.requestCount.incrementAndGet();
HRegion region = getRegion(regionName);
try {
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
boolean writeToWAL = put.getWriteToWAL();
region.put(put, getLockFromId(put.getLockId()), writeToWAL);
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
public int put(final byte[] regionName, final List<Put> puts)
throws IOException {
checkOpen();
HRegion region = null;
try {
region = getRegion(regionName);
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
@SuppressWarnings("unchecked")
Pair<Put, Integer>[] putsWithLocks = new Pair[puts.size()];
int i = 0;
for (Put p : puts) {
Integer lock = getLockFromId(p.getLockId());
putsWithLocks[i++] = new Pair<Put, Integer>(p, lock);
}
this.requestCount.addAndGet(puts.size());
OperationStatusCode[] codes = region.put(putsWithLocks);
for (i = 0; i < codes.length; i++) {
if (codes[i] != OperationStatusCode.SUCCESS) {
return i;
}
}
return -1;
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
private boolean checkAndMutate(final byte[] regionName, final byte[] row,
final byte[] family, final byte[] qualifier, final byte[] value,
final Writable w, Integer lock) throws IOException {
checkOpen();
this.requestCount.incrementAndGet();
HRegion region = getRegion(regionName);
try {
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
return region
.checkAndMutate(row, family, qualifier, value, w, lock, true);
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
/**
*
* @param regionName
* @param row
* @param family
* @param qualifier
* @param value
* the expected value
* @param put
* @throws IOException
* @return true if the new put was execute, false otherwise
*/
public boolean checkAndPut(final byte[] regionName, final byte[] row,
final byte[] family, final byte[] qualifier, final byte[] value,
final Put put) throws IOException {
return checkAndMutate(regionName, row, family, qualifier, value, put,
getLockFromId(put.getLockId()));
}
/**
*
* @param regionName
* @param row
* @param family
* @param qualifier
* @param value
* the expected value
* @param delete
* @throws IOException
* @return true if the new put was execute, false otherwise
*/
public boolean checkAndDelete(final byte[] regionName, final byte[] row,
final byte[] family, final byte[] qualifier, final byte[] value,
final Delete delete) throws IOException {
return checkAndMutate(regionName, row, family, qualifier, value, delete,
getLockFromId(delete.getLockId()));
}
//
// remote scanner interface
//
public long openScanner(byte[] regionName, Scan scan) throws IOException {
checkOpen();
NullPointerException npe = null;
if (regionName == null) {
npe = new NullPointerException("regionName is null");
} else if (scan == null) {
npe = new NullPointerException("scan is null");
}
if (npe != null) {
throw new IOException("Invalid arguments to openScanner", npe);
}
requestCount.incrementAndGet();
try {
HRegion r = getRegion(regionName);
return addScanner(r.getScanner(scan));
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t, "Failed openScanner"));
}
}
protected long addScanner(InternalScanner s) throws LeaseStillHeldException {
long scannerId = -1L;
scannerId = rand.nextLong();
String scannerName = String.valueOf(scannerId);
scanners.put(scannerName, s);
this.leases.createLease(scannerName, new ScannerListener(scannerName));
return scannerId;
}
public Result next(final long scannerId) throws IOException {
Result[] res = next(scannerId, 1);
if (res == null || res.length == 0) {
return null;
}
return res[0];
}
public Result[] next(final long scannerId, int nbRows) throws IOException {
try {
String scannerName = String.valueOf(scannerId);
InternalScanner s = this.scanners.get(scannerName);
if (s == null) {
throw new UnknownScannerException("Name: " + scannerName);
}
try {
checkOpen();
} catch (IOException e) {
// If checkOpen failed, server not running or filesystem gone,
// cancel this lease; filesystem is gone or we're closing or something.
this.leases.cancelLease(scannerName);
throw e;
}
this.leases.renewLease(scannerName);
List<Result> results = new ArrayList<Result>(nbRows);
long currentScanResultSize = 0;
List<KeyValue> values = new ArrayList<KeyValue>();
for (int i = 0; i < nbRows
&& currentScanResultSize < maxScannerResultSize; i++) {
requestCount.incrementAndGet();
// Collect values to be returned here
boolean moreRows = s.next(values);
if (!values.isEmpty()) {
for (KeyValue kv : values) {
currentScanResultSize += kv.heapSize();
}
results.add(new Result(values));
}
if (!moreRows) {
break;
}
values.clear();
}
// Below is an ugly hack where we cast the InternalScanner to be a
// HRegion.RegionScanner. The alternative is to change InternalScanner
// interface but its used everywhere whereas we just need a bit of info
// from HRegion.RegionScanner, IF its filter if any is done with the scan
// and wants to tell the client to stop the scan. This is done by passing
// a null result.
return ((HRegion.RegionScanner) s).isFilterDone() && results.isEmpty() ? null
: results.toArray(new Result[0]);
} catch (Throwable t) {
if (t instanceof NotServingRegionException) {
String scannerName = String.valueOf(scannerId);
this.scanners.remove(scannerName);
}
throw convertThrowableToIOE(cleanup(t));
}
}
public void close(final long scannerId) throws IOException {
try {
checkOpen();
requestCount.incrementAndGet();
String scannerName = String.valueOf(scannerId);
InternalScanner s = scanners.remove(scannerName);
if (s != null) {
s.close();
this.leases.cancelLease(scannerName);
}
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
/**
* Instantiated as a scanner lease. If the lease times out, the scanner is
* closed
*/
private class ScannerListener implements LeaseListener {
private final String scannerName;
ScannerListener(final String n) {
this.scannerName = n;
}
public void leaseExpired() {
LOG.info("Scanner " + this.scannerName + " lease expired");
InternalScanner s = scanners.remove(this.scannerName);
if (s != null) {
try {
s.close();
} catch (IOException e) {
LOG.error("Closing scanner", e);
}
}
}
}
//
// Methods that do the actual work for the remote API
//
public void delete(final byte[] regionName, final Delete delete)
throws IOException {
checkOpen();
try {
boolean writeToWAL = true;
this.requestCount.incrementAndGet();
HRegion region = getRegion(regionName);
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
Integer lid = getLockFromId(delete.getLockId());
region.delete(delete, lid, writeToWAL);
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
public int delete(final byte[] regionName, final List<Delete> deletes)
throws IOException {
// Count of Deletes processed.
int i = 0;
checkOpen();
HRegion region = null;
try {
boolean writeToWAL = true;
region = getRegion(regionName);
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
int size = deletes.size();
Integer[] locks = new Integer[size];
for (Delete delete : deletes) {
this.requestCount.incrementAndGet();
locks[i] = getLockFromId(delete.getLockId());
region.delete(delete, locks[i], writeToWAL);
i++;
}
} catch (WrongRegionException ex) {
LOG.debug("Batch deletes: " + i, ex);
return i;
} catch (NotServingRegionException ex) {
return i;
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
return -1;
}
public long lockRow(byte[] regionName, byte[] row) throws IOException {
checkOpen();
NullPointerException npe = null;
if (regionName == null) {
npe = new NullPointerException("regionName is null");
} else if (row == null) {
npe = new NullPointerException("row to lock is null");
}
if (npe != null) {
IOException io = new IOException("Invalid arguments to lockRow");
io.initCause(npe);
throw io;
}
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
Integer r = region.obtainRowLock(row);
long lockId = addRowLock(r, region);
LOG.debug("Row lock " + lockId + " explicitly acquired by client");
return lockId;
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t, "Error obtaining row lock (fsOk: "
+ this.fsOk + ")"));
}
}
protected long addRowLock(Integer r, HRegion region)
throws LeaseStillHeldException {
long lockId = -1L;
lockId = rand.nextLong();
String lockName = String.valueOf(lockId);
rowlocks.put(lockName, r);
this.leases.createLease(lockName, new RowLockListener(lockName, region));
return lockId;
}
/**
* Method to get the Integer lock identifier used internally from the long
* lock identifier used by the client.
*
* @param lockId
* long row lock identifier from client
* @return intId Integer row lock used internally in HRegion
* @throws IOException
* Thrown if this is not a valid client lock id.
*/
Integer getLockFromId(long lockId) throws IOException {
if (lockId == -1L) {
return null;
}
String lockName = String.valueOf(lockId);
Integer rl = rowlocks.get(lockName);
if (rl == null) {
throw new UnknownRowLockException("Invalid row lock");
}
this.leases.renewLease(lockName);
return rl;
}
public void unlockRow(byte[] regionName, long lockId) throws IOException {
checkOpen();
NullPointerException npe = null;
if (regionName == null) {
npe = new NullPointerException("regionName is null");
} else if (lockId == -1L) {
npe = new NullPointerException("lockId is null");
}
if (npe != null) {
IOException io = new IOException("Invalid arguments to unlockRow");
io.initCause(npe);
throw io;
}
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
String lockName = String.valueOf(lockId);
Integer r = rowlocks.remove(lockName);
if (r == null) {
throw new UnknownRowLockException(lockName);
}
region.releaseRowLock(r);
this.leases.cancelLease(lockName);
LOG.debug("Row lock " + lockId
+ " has been explicitly released by client");
} catch (Throwable t) {
throw convertThrowableToIOE(cleanup(t));
}
}
@Override
public void bulkLoadHFile(String hfilePath, byte[] regionName,
byte[] familyName) throws IOException {
HRegion region = getRegion(regionName);
region.bulkLoadHFile(hfilePath, familyName);
}
Map<String, Integer> rowlocks = new ConcurrentHashMap<String, Integer>();
/**
* Instantiated as a row lock lease. If the lease times out, the row lock is
* released
*/
private class RowLockListener implements LeaseListener {
private final String lockName;
private final HRegion region;
RowLockListener(final String lockName, final HRegion region) {
this.lockName = lockName;
this.region = region;
}
public void leaseExpired() {
LOG.info("Row Lock " + this.lockName + " lease expired");
Integer r = rowlocks.remove(this.lockName);
if (r != null) {
region.releaseRowLock(r);
}
}
}
// Region open/close direct RPCs
@Override
public void openRegion(HRegionInfo region)
throws RegionServerStoppedException {
LOG.info("Received request to open region: " +
region.getRegionNameAsString());
if (this.stopped) throw new RegionServerStoppedException();
if (region.isRootRegion()) {
this.service.submit(new OpenRootHandler(this, this, region));
} else if(region.isMetaRegion()) {
this.service.submit(new OpenMetaHandler(this, this, region));
} else {
this.service.submit(new OpenRegionHandler(this, this, region));
}
}
@Override
public void openRegions(List<HRegionInfo> regions)
throws RegionServerStoppedException {
LOG.info("Received request to open " + regions.size() + " region(s)");
for (HRegionInfo region: regions) openRegion(region);
}
@Override
public boolean closeRegion(HRegionInfo region)
throws NotServingRegionException {
return closeRegion(region, true);
}
@Override
public boolean closeRegion(HRegionInfo region, final boolean zk)
throws NotServingRegionException {
LOG.info("Received close region: " + region.getRegionNameAsString());
synchronized (this.onlineRegions) {
boolean hasit = this.onlineRegions.containsKey(region.getEncodedName());
if (!hasit) {
LOG.warn("Received close for region we are not serving; " +
region.getEncodedName());
throw new NotServingRegionException("Received close for "
+ region.getRegionNameAsString() + " but we are not serving it");
}
}
return closeRegion(region, false, zk);
}
/**
* @param region Region to close
* @param abort True if we are aborting
* @param zk True if we are to update zk about the region close; if the close
* was orchestrated by master, then update zk. If the close is being run by
* the regionserver because its going down, don't update zk.
* @return True if closed a region.
*/
protected boolean closeRegion(HRegionInfo region, final boolean abort,
final boolean zk) {
CloseRegionHandler crh = null;
if (region.isRootRegion()) {
crh = new CloseRootHandler(this, this, region, abort, zk);
} else if (region.isMetaRegion()) {
crh = new CloseMetaHandler(this, this, region, abort, zk);
} else {
crh = new CloseRegionHandler(this, this, region, abort, zk);
}
this.service.submit(crh);
return true;
}
// Manual remote region administration RPCs
@Override
public void flushRegion(HRegionInfo regionInfo)
throws NotServingRegionException, IOException {
LOG.info("Flushing " + regionInfo.getRegionNameAsString());
HRegion region = getRegion(regionInfo.getRegionName());
region.flushcache();
}
@Override
public void splitRegion(HRegionInfo regionInfo)
throws NotServingRegionException, IOException {
HRegion region = getRegion(regionInfo.getRegionName());
region.flushcache();
region.shouldSplit(true);
// force a compaction, split will be side-effect
// TODO: flush/compact/split refactor will make it trivial to do this
// sync/async (and won't require us to do a compaction to split!)
compactSplitThread.requestCompaction(region, "User-triggered split",
CompactSplitThread.PRIORITY_USER);
}
@Override
public void compactRegion(HRegionInfo regionInfo, boolean major)
throws NotServingRegionException, IOException {
HRegion region = getRegion(regionInfo.getRegionName());
compactSplitThread.requestCompaction(region, major, "User-triggered "
+ (major ? "major " : "") + "compaction",
CompactSplitThread.PRIORITY_USER);
}
/** @return the info server */
public InfoServer getInfoServer() {
return infoServer;
}
/**
* @return true if a stop has been requested.
*/
public boolean isStopped() {
return this.stopped;
}
@Override
public boolean isStopping() {
return this.stopping;
}
/**
*
* @return the configuration
*/
public Configuration getConfiguration() {
return conf;
}
/** @return the write lock for the server */
ReentrantReadWriteLock.WriteLock getWriteLock() {
return lock.writeLock();
}
@Override
public List<HRegionInfo> getOnlineRegions() {
List<HRegionInfo> list = new ArrayList<HRegionInfo>();
synchronized(this.onlineRegions) {
for (Map.Entry<String,HRegion> e: this.onlineRegions.entrySet()) {
list.add(e.getValue().getRegionInfo());
}
}
Collections.sort(list);
return list;
}
public int getNumberOfOnlineRegions() {
int size = -1;
synchronized (this.onlineRegions) {
size = this.onlineRegions.size();
}
return size;
}
boolean isOnlineRegionsEmpty() {
synchronized (this.onlineRegions) {
return this.onlineRegions.isEmpty();
}
}
/**
* For tests and web ui.
* This method will only work if HRegionServer is in the same JVM as client;
* HRegion cannot be serialized to cross an rpc.
* @see #getOnlineRegions()
*/
public Collection<HRegion> getOnlineRegionsLocalContext() {
synchronized (this.onlineRegions) {
Collection<HRegion> regions = this.onlineRegions.values();
return Collections.unmodifiableCollection(regions);
}
}
@Override
public void addToOnlineRegions(HRegion region) {
lock.writeLock().lock();
try {
synchronized (this.onlineRegions) {
this.onlineRegions.put(region.getRegionInfo().getEncodedName(), region);
}
} finally {
lock.writeLock().unlock();
}
}
@Override
public boolean removeFromOnlineRegions(final String encodedName) {
this.lock.writeLock().lock();
HRegion toReturn = null;
try {
synchronized (this.onlineRegions) {
toReturn = this.onlineRegions.remove(encodedName);
}
} finally {
this.lock.writeLock().unlock();
}
return toReturn != null;
}
/**
* @return A new Map of online regions sorted by region size with the first
* entry being the biggest.
*/
public SortedMap<Long, HRegion> getCopyOfOnlineRegionsSortedBySize() {
// we'll sort the regions in reverse
SortedMap<Long, HRegion> sortedRegions = new TreeMap<Long, HRegion>(
new Comparator<Long>() {
public int compare(Long a, Long b) {
return -1 * a.compareTo(b);
}
});
// Copy over all regions. Regions are sorted by size with biggest first.
synchronized (this.onlineRegions) {
for (HRegion region : this.onlineRegions.values()) {
sortedRegions.put(Long.valueOf(region.memstoreSize.get()), region);
}
}
return sortedRegions;
}
@Override
public HRegion getFromOnlineRegions(final String encodedRegionName) {
HRegion r = null;
synchronized (this.onlineRegions) {
r = this.onlineRegions.get(encodedRegionName);
}
return r;
}
/**
* @param regionName
* @return HRegion for the passed binary <code>regionName</code> or null if
* named region is not member of the online regions.
*/
public HRegion getOnlineRegion(final byte[] regionName) {
return getFromOnlineRegions(HRegionInfo.encodeRegionName(regionName));
}
/** @return the request count */
public AtomicInteger getRequestCount() {
return this.requestCount;
}
/** @return reference to FlushRequester */
public FlushRequester getFlushRequester() {
return this.cacheFlusher;
}
/**
* Protected utility method for safely obtaining an HRegion handle.
*
* @param regionName
* Name of online {@link HRegion} to return
* @return {@link HRegion} for <code>regionName</code>
* @throws NotServingRegionException
*/
protected HRegion getRegion(final byte[] regionName)
throws NotServingRegionException {
HRegion region = null;
this.lock.readLock().lock();
try {
region = getOnlineRegion(regionName);
if (region == null) {
throw new NotServingRegionException("Region is not online: " +
Bytes.toStringBinary(regionName));
}
return region;
} finally {
this.lock.readLock().unlock();
}
}
/**
* Get the top N most loaded regions this server is serving so we can tell the
* master which regions it can reallocate if we're overloaded. TODO: actually
* calculate which regions are most loaded. (Right now, we're just grabbing
* the first N regions being served regardless of load.)
*/
protected HRegionInfo[] getMostLoadedRegions() {
ArrayList<HRegionInfo> regions = new ArrayList<HRegionInfo>();
synchronized (onlineRegions) {
for (HRegion r : onlineRegions.values()) {
if (r.isClosed() || r.isClosing()) {
continue;
}
if (regions.size() < numRegionsToReport) {
regions.add(r.getRegionInfo());
} else {
break;
}
}
}
return regions.toArray(new HRegionInfo[regions.size()]);
}
/**
* Called to verify that this server is up and running.
*
* @throws IOException
*/
protected void checkOpen() throws IOException {
if (this.stopped || this.abortRequested) {
throw new IOException("Server not running"
+ (this.abortRequested ? ", aborting" : ""));
}
if (!fsOk) {
throw new IOException("File system not available");
}
}
/**
* @return Returns list of non-closed regions hosted on this server. If no
* regions to check, returns an empty list.
*/
protected Set<HRegion> getRegionsToCheck() {
HashSet<HRegion> regionsToCheck = new HashSet<HRegion>();
// TODO: is this locking necessary?
lock.readLock().lock();
try {
synchronized (this.onlineRegions) {
regionsToCheck.addAll(this.onlineRegions.values());
}
} finally {
lock.readLock().unlock();
}
// Purge closed regions.
for (final Iterator<HRegion> i = regionsToCheck.iterator(); i.hasNext();) {
HRegion r = i.next();
if (r.isClosed()) {
i.remove();
}
}
return regionsToCheck;
}
public long getProtocolVersion(final String protocol, final long clientVersion)
throws IOException {
if (protocol.equals(HRegionInterface.class.getName())) {
return HBaseRPCProtocolVersion.versionID;
}
throw new IOException("Unknown protocol to name node: " + protocol);
}
/**
* @return Queue to which you can add outbound messages.
*/
protected LinkedBlockingQueue<HMsg> getOutboundMsgs() {
return this.outboundMsgs;
}
/**
* Return the total size of all memstores in every region.
*
* @return memstore size in bytes
*/
public long getGlobalMemStoreSize() {
long total = 0;
synchronized (onlineRegions) {
for (HRegion region : onlineRegions.values()) {
total += region.memstoreSize.get();
}
}
return total;
}
/**
* @return Return the leases.
*/
protected Leases getLeases() {
return leases;
}
/**
* @return Return the rootDir.
*/
protected Path getRootDir() {
return rootDir;
}
/**
* @return Return the fs.
*/
protected FileSystem getFileSystem() {
return fs;
}
/**
* @return Info on port this server has bound to, etc.
*/
public HServerInfo getServerInfo() {
return this.serverInfo;
}
@Override
public Result increment(byte[] regionName, Increment increment)
throws IOException {
checkOpen();
if (regionName == null) {
throw new IOException("Invalid arguments to increment " +
"regionName is null");
}
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
return region.increment(increment, getLockFromId(increment.getLockId()),
increment.getWriteToWAL());
} catch (IOException e) {
checkFileSystem();
throw e;
}
}
/** {@inheritDoc} */
public long incrementColumnValue(byte[] regionName, byte[] row,
byte[] family, byte[] qualifier, long amount, boolean writeToWAL)
throws IOException {
checkOpen();
if (regionName == null) {
throw new IOException("Invalid arguments to incrementColumnValue "
+ "regionName is null");
}
requestCount.incrementAndGet();
try {
HRegion region = getRegion(regionName);
long retval = region.incrementColumnValue(row, family, qualifier, amount,
writeToWAL);
return retval;
} catch (IOException e) {
checkFileSystem();
throw e;
}
}
public HRegionInfo[] getRegionsAssignment() throws IOException {
synchronized (this.onlineRegions) {
HRegionInfo [] regions = new HRegionInfo[getNumberOfOnlineRegions()];
Iterator<HRegion> ite = onlineRegions.values().iterator();
for (int i = 0; ite.hasNext(); i++) {
regions[i] = ite.next().getRegionInfo();
}
return regions;
}
}
/** {@inheritDoc} */
public HServerInfo getHServerInfo() throws IOException {
return serverInfo;
}
@SuppressWarnings("unchecked")
@Override
public MultiResponse multi(MultiAction multi) throws IOException {
MultiResponse response = new MultiResponse();
for (Map.Entry<byte[], List<Action>> e : multi.actions.entrySet()) {
byte[] regionName = e.getKey();
List<Action> actionsForRegion = e.getValue();
// sort based on the row id - this helps in the case where we reach the
// end of a region, so that we don't have to try the rest of the
// actions in the list.
Collections.sort(actionsForRegion);
Row action;
List<Action> puts = new ArrayList<Action>();
for (Action a : actionsForRegion) {
action = a.getAction();
int originalIndex = a.getOriginalIndex();
try {
if (action instanceof Delete) {
delete(regionName, (Delete) action);
response.add(regionName, originalIndex, new Result());
} else if (action instanceof Get) {
response.add(regionName, originalIndex, get(regionName, (Get) action));
} else if (action instanceof Put) {
puts.add(a); // wont throw.
} else {
LOG.debug("Error: invalid Action, row must be a Get, Delete or Put.");
throw new DoNotRetryIOException("Invalid Action, row must be a Get, Delete or Put.");
}
} catch (IOException ex) {
response.add(regionName, originalIndex, ex);
}
}
// We do the puts with result.put so we can get the batching efficiency
// we so need. All this data munging doesn't seem great, but at least
// we arent copying bytes or anything.
if (!puts.isEmpty()) {
try {
HRegion region = getRegion(regionName);
if (!region.getRegionInfo().isMetaTable()) {
this.cacheFlusher.reclaimMemStoreMemory();
}
List<Pair<Put,Integer>> putsWithLocks =
Lists.newArrayListWithCapacity(puts.size());
for (Action a : puts) {
Put p = (Put) a.getAction();
Integer lock;
try {
lock = getLockFromId(p.getLockId());
} catch (UnknownRowLockException ex) {
response.add(regionName, a.getOriginalIndex(), ex);
continue;
}
putsWithLocks.add(new Pair<Put, Integer>(p, lock));
}
this.requestCount.addAndGet(puts.size());
OperationStatusCode[] codes =
region.put(putsWithLocks.toArray(new Pair[]{}));
for( int i = 0 ; i < codes.length ; i++) {
OperationStatusCode code = codes[i];
Action theAction = puts.get(i);
Object result = null;
if (code == OperationStatusCode.SUCCESS) {
result = new Result();
} else if (code == OperationStatusCode.BAD_FAMILY) {
result = new NoSuchColumnFamilyException();
}
// FAILURE && NOT_RUN becomes null, aka: need to run again.
response.add(regionName, theAction.getOriginalIndex(), result);
}
} catch (IOException ioe) {
// fail all the puts with the ioe in question.
for (Action a: puts) {
response.add(regionName, a.getOriginalIndex(), ioe);
}
}
}
}
return response;
}
/**
* @deprecated Use HRegionServer.multi( MultiAction action) instead
*/
@Override
public MultiPutResponse multiPut(MultiPut puts) throws IOException {
MultiPutResponse resp = new MultiPutResponse();
// do each region as it's own.
for (Map.Entry<byte[], List<Put>> e : puts.puts.entrySet()) {
int result = put(e.getKey(), e.getValue());
resp.addResult(e.getKey(), result);
e.getValue().clear(); // clear some RAM
}
return resp;
}
public String toString() {
return this.serverInfo.toString();
}
/**
* Interval at which threads should run
*
* @return the interval
*/
public int getThreadWakeFrequency() {
return threadWakeFrequency;
}
@Override
public ZooKeeperWatcher getZooKeeper() {
return zooKeeper;
}
@Override
public String getServerName() {
return serverInfo.getServerName();
}
@Override
public CompactionRequestor getCompactionRequester() {
return this.compactSplitThread;
}
//
// Main program and support routines
//
/**
* @param hrs
* @return Thread the RegionServer is running in correctly named.
* @throws IOException
*/
public static Thread startRegionServer(final HRegionServer hrs)
throws IOException {
return startRegionServer(hrs, "regionserver"
+ hrs.getServerInfo().getServerAddress().getPort());
}
/**
* @param hrs
* @param name
* @return Thread the RegionServer is running in correctly named.
* @throws IOException
*/
public static Thread startRegionServer(final HRegionServer hrs,
final String name) throws IOException {
Thread t = new Thread(hrs);
t.setName(name);
t.start();
// Install shutdown hook that will catch signals and run an orderly shutdown
// of the hrs.
ShutdownHook.install(hrs.getConfiguration(), FileSystem.get(hrs
.getConfiguration()), hrs, t);
return t;
}
/**
* Utility for constructing an instance of the passed HRegionServer class.
*
* @param regionServerClass
* @param conf2
* @return HRegionServer instance.
*/
public static HRegionServer constructRegionServer(
Class<? extends HRegionServer> regionServerClass,
final Configuration conf2) {
try {
Constructor<? extends HRegionServer> c = regionServerClass
.getConstructor(Configuration.class);
return c.newInstance(conf2);
} catch (Exception e) {
throw new RuntimeException("Failed construction of " + "Regionserver: "
+ regionServerClass.toString(), e);
}
}
@Override
public void replicateLogEntries(final HLog.Entry[] entries)
throws IOException {
if (this.replicationHandler == null) return;
this.replicationHandler.replicateLogEntries(entries);
}
/**
* @see org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine
*/
public static void main(String[] args) throws Exception {
Configuration conf = HBaseConfiguration.create();
@SuppressWarnings("unchecked")
Class<? extends HRegionServer> regionServerClass = (Class<? extends HRegionServer>) conf
.getClass(HConstants.REGION_SERVER_IMPL, HRegionServer.class);
new HRegionServerCommandLine(regionServerClass).doMain(args);
}
}