/*
*
* 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.client;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.net.SocketTimeoutException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.Waiter;
import org.apache.hadoop.hbase.client.ConnectionManager.HConnectionImplementation;
import org.apache.hadoop.hbase.coprocessor.BaseRegionObserver;
import org.apache.hadoop.hbase.coprocessor.ObserverContext;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.exceptions.RegionMovedException;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterBase;
import org.apache.hadoop.hbase.ipc.RpcClient;
import org.apache.hadoop.hbase.master.HMaster;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.JVMClusterUtil;
import org.apache.hadoop.hbase.util.ManualEnvironmentEdge;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.jboss.netty.util.internal.DetectionUtil;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import com.google.common.collect.Lists;
/**
* This class is for testing HBaseConnectionManager features
*/
@Category(MediumTests.class)
public class TestHCM {
private static final Log LOG = LogFactory.getLog(TestHCM.class);
private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
private static final TableName TABLE_NAME =
TableName.valueOf("test");
private static final TableName TABLE_NAME1 =
TableName.valueOf("test1");
private static final TableName TABLE_NAME2 =
TableName.valueOf("test2");
private static final TableName TABLE_NAME3 =
TableName.valueOf("test3");
private static final TableName TABLE_NAME4 =
TableName.valueOf("test4");
private static final byte[] FAM_NAM = Bytes.toBytes("f");
private static final byte[] ROW = Bytes.toBytes("bbb");
private static final byte[] ROW_X = Bytes.toBytes("xxx");
private static Random _randy = new Random();
private static boolean isJavaOk = DetectionUtil.javaVersion() > 6;
/**
* This copro sleeps 20 second. The first call it fails. The second time, it works.
*/
public static class SleepAndFailFirstTime extends BaseRegionObserver {
static final AtomicLong ct = new AtomicLong(0);
public SleepAndFailFirstTime() {
}
@Override
public void preGetOp(final ObserverContext<RegionCoprocessorEnvironment> e,
final Get get, final List<Cell> results) throws IOException {
Threads.sleep(20000);
if (ct.incrementAndGet() == 1){
throw new IOException("first call I fail");
}
}
}
@BeforeClass
public static void setUpBeforeClass() throws Exception {
TEST_UTIL.getConfiguration().setBoolean(HConstants.STATUS_PUBLISHED,
HConstants.STATUS_PUBLISHED_DEFAULT);
if (isJavaOk) {
TEST_UTIL.getConfiguration().setBoolean(HConstants.STATUS_PUBLISHED, true);
}
TEST_UTIL.startMiniCluster(2);
}
@AfterClass public static void tearDownAfterClass() throws Exception {
TEST_UTIL.shutdownMiniCluster();
}
private static int getHConnectionManagerCacheSize(){
return HConnectionTestingUtility.getConnectionCount();
}
@Test
public void testClusterConnection() throws IOException {
ThreadPoolExecutor otherPool = new ThreadPoolExecutor(1, 1,
5, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>(),
Threads.newDaemonThreadFactory("test-hcm"));
HConnection con1 = HConnectionManager.createConnection(TEST_UTIL.getConfiguration());
HConnection con2 = HConnectionManager.createConnection(TEST_UTIL.getConfiguration(), otherPool);
// make sure the internally created ExecutorService is the one passed
assertTrue(otherPool == ((HConnectionImplementation)con2).getCurrentBatchPool());
String tableName = "testClusterConnection";
TEST_UTIL.createTable(tableName.getBytes(), FAM_NAM).close();
HTable t = (HTable)con1.getTable(tableName, otherPool);
// make sure passing a pool to the getTable does not trigger creation of an internal pool
assertNull("Internal Thread pool should be null", ((HConnectionImplementation)con1).getCurrentBatchPool());
// table should use the pool passed
assertTrue(otherPool == t.getPool());
t.close();
t = (HTable)con2.getTable(tableName);
// table should use the connectin's internal pool
assertTrue(otherPool == t.getPool());
t.close();
t = (HTable)con2.getTable(Bytes.toBytes(tableName));
// try other API too
assertTrue(otherPool == t.getPool());
t.close();
t = (HTable)con2.getTable(TableName.valueOf(tableName));
// try other API too
assertTrue(otherPool == t.getPool());
t.close();
t = (HTable)con1.getTable(tableName);
ExecutorService pool = ((HConnectionImplementation)con1).getCurrentBatchPool();
// make sure an internal pool was created
assertNotNull("An internal Thread pool should have been created", pool);
// and that the table is using it
assertTrue(t.getPool() == pool);
t.close();
t = (HTable)con1.getTable(tableName);
// still using the *same* internal pool
assertTrue(t.getPool() == pool);
t.close();
con1.close();
// if the pool was created on demand it should be closed upon connection close
assertTrue(pool.isShutdown());
con2.close();
// if the pool is passed, it is not closed
assertFalse(otherPool.isShutdown());
otherPool.shutdownNow();
}
/**
* Naive test to check that HConnection#getAdmin returns a properly constructed HBaseAdmin object
* @throws IOException Unable to construct admin
*/
@Test
public void testAdminFactory() throws IOException {
Connection con1 = ConnectionFactory.createConnection(TEST_UTIL.getConfiguration());
Admin admin = con1.getAdmin();
assertTrue(admin.getConnection() == con1);
assertTrue(admin.getConfiguration() == TEST_UTIL.getConfiguration());
con1.close();
}
// Fails too often! Needs work. HBASE-12558
@Ignore @Test(expected = RegionServerStoppedException.class)
public void testClusterStatus() throws Exception {
if (!isJavaOk){
// This test requires jdk 1.7+
throw new RegionServerStoppedException("as expected by the test...");
}
TableName tn =
TableName.valueOf("testClusterStatus");
byte[] cf = "cf".getBytes();
byte[] rk = "rk1".getBytes();
JVMClusterUtil.RegionServerThread rs = TEST_UTIL.getHBaseCluster().startRegionServer();
rs.waitForServerOnline();
final ServerName sn = rs.getRegionServer().getServerName();
HTable t = TEST_UTIL.createTable(tn, cf);
TEST_UTIL.waitTableAvailable(tn);
while(TEST_UTIL.getHBaseCluster().getMaster().getAssignmentManager().
getRegionStates().isRegionsInTransition()){
Thread.sleep(1);
}
final HConnectionImplementation hci = (HConnectionImplementation)t.getConnection();
while (t.getRegionLocation(rk).getPort() != sn.getPort()){
TEST_UTIL.getHBaseAdmin().move(t.getRegionLocation(rk).getRegionInfo().
getEncodedNameAsBytes(), Bytes.toBytes(sn.toString()));
while(TEST_UTIL.getHBaseCluster().getMaster().getAssignmentManager().
getRegionStates().isRegionsInTransition()){
Thread.sleep(1);
}
hci.clearRegionCache(tn);
}
Assert.assertNotNull(hci.clusterStatusListener);
TEST_UTIL.assertRegionOnServer(t.getRegionLocation(rk).getRegionInfo(), sn, 20000);
Put p1 = new Put(rk);
p1.add(cf, "qual".getBytes(), "val".getBytes());
t.put(p1);
rs.getRegionServer().abort("I'm dead");
// We want the status to be updated. That's a least 10 second
TEST_UTIL.waitFor(40000, 1000, true, new Waiter.Predicate<Exception>() {
@Override
public boolean evaluate() throws Exception {
return TEST_UTIL.getHBaseCluster().getMaster().getServerManager().
getDeadServers().isDeadServer(sn);
}
});
TEST_UTIL.waitFor(40000, 1000, true, new Waiter.Predicate<Exception>() {
@Override
public boolean evaluate() throws Exception {
return hci.clusterStatusListener.isDeadServer(sn);
}
});
t.close();
hci.getClient(sn); // will throw an exception: RegionServerStoppedException
}
/**
* Test that we can handle connection close: it will trigger a retry, but the calls will
* finish.
*/
@Test
public void testConnectionCloseAllowsInterrupt() throws Exception {
testConnectionClose(true);
}
@Test
public void testConnectionNotAllowsInterrupt() throws Exception {
testConnectionClose(false);
}
/**
* Test that an operation can fail if we read the global operation timeout, even if the
* individual timeout is fine. We do that with:
* - client side: an operation timeout of 30 seconds
* - server side: we sleep 20 second at each attempt. The first work fails, the second one
* succeeds. But the client won't wait that much, because 20 + 20 > 30, so the client
* timeouted when the server answers.
*/
@Test
public void testOperationTimeout() throws Exception {
HTableDescriptor hdt = TEST_UTIL.createTableDescriptor("HCM-testOperationTimeout");
hdt.addCoprocessor(SleepAndFailFirstTime.class.getName());
HTable table = TEST_UTIL.createTable(hdt, new byte[][]{FAM_NAM}, TEST_UTIL.getConfiguration());
// Check that it works if the timeout is big enough
table.setOperationTimeout(120 * 1000);
table.get(new Get(FAM_NAM));
// Resetting and retrying. Will fail this time, not enough time for the second try
SleepAndFailFirstTime.ct.set(0);
try {
table.setOperationTimeout(30 * 1000);
table.get(new Get(FAM_NAM));
Assert.fail("We expect an exception here");
} catch (SocketTimeoutException e) {
// The client has a CallTimeout class, but it's not shared.We're not very clean today,
// in the general case you can expect the call to stop, but the exception may vary.
// In this test however, we're sure that it will be a socket timeout.
LOG.info("We received an exception, as expected ", e);
} catch (IOException e) {
Assert.fail("Wrong exception:" + e.getMessage());
} finally {
table.close();
}
}
private void testConnectionClose(boolean allowsInterrupt) throws Exception {
TableName tableName = TableName.valueOf("HCM-testConnectionClose" + allowsInterrupt);
TEST_UTIL.createTable(tableName, FAM_NAM).close();
boolean previousBalance = TEST_UTIL.getHBaseAdmin().setBalancerRunning(false, true);
Configuration c2 = new Configuration(TEST_UTIL.getConfiguration());
// We want to work on a separate connection.
c2.set(HConstants.HBASE_CLIENT_INSTANCE_ID, String.valueOf(-1));
c2.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 100); // retry a lot
c2.setInt(HConstants.HBASE_CLIENT_PAUSE, 0); // don't wait between retries.
c2.setInt(RpcClient.FAILED_SERVER_EXPIRY_KEY, 0); // Server do not really expire
c2.setBoolean(RpcClient.SPECIFIC_WRITE_THREAD, allowsInterrupt);
final HTable table = new HTable(c2, tableName);
Put put = new Put(ROW);
put.add(FAM_NAM, ROW, ROW);
table.put(put);
// 4 steps: ready=0; doGets=1; mustStop=2; stopped=3
final AtomicInteger step = new AtomicInteger(0);
final AtomicReference<Throwable> failed = new AtomicReference<Throwable>(null);
Thread t = new Thread("testConnectionCloseThread") {
@Override
public void run() {
int done = 0;
try {
step.set(1);
while (step.get() == 1) {
Get get = new Get(ROW);
table.get(get);
done++;
if (done % 100 == 0)
LOG.info("done=" + done);
}
} catch (Throwable t) {
failed.set(t);
LOG.error(t);
}
step.set(3);
}
};
t.start();
TEST_UTIL.waitFor(20000, new Waiter.Predicate<Exception>() {
@Override
public boolean evaluate() throws Exception {
return step.get() == 1;
}
});
ServerName sn = table.getRegionLocation(ROW).getServerName();
ConnectionManager.HConnectionImplementation conn =
(ConnectionManager.HConnectionImplementation) table.getConnection();
RpcClient rpcClient = conn.getRpcClient();
LOG.info("Going to cancel connections. connection=" + conn.toString() + ", sn=" + sn);
for (int i = 0; i < 5000; i++) {
rpcClient.cancelConnections(sn);
Thread.sleep(5);
}
step.compareAndSet(1, 2);
// The test may fail here if the thread doing the gets is stuck. The way to find
// out what's happening is to look for the thread named 'testConnectionCloseThread'
TEST_UTIL.waitFor(40000, new Waiter.Predicate<Exception>() {
@Override
public boolean evaluate() throws Exception {
return step.get() == 3;
}
});
table.close();
Assert.assertTrue("Unexpected exception is " + failed.get(), failed.get() == null);
TEST_UTIL.getHBaseAdmin().setBalancerRunning(previousBalance, true);
}
/**
* Test that connection can become idle without breaking everything.
*/
@Test
public void testConnectionIdle() throws Exception {
TableName tableName = TableName.valueOf("HCM-testConnectionIdle");
TEST_UTIL.createTable(tableName, FAM_NAM).close();
int idleTime = 20000;
boolean previousBalance = TEST_UTIL.getHBaseAdmin().setBalancerRunning(false, true);
Configuration c2 = new Configuration(TEST_UTIL.getConfiguration());
// We want to work on a separate connection.
c2.set(HConstants.HBASE_CLIENT_INSTANCE_ID, String.valueOf(-1));
c2.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1); // Don't retry: retry = test failed
c2.setInt(RpcClient.IDLE_TIME, idleTime);
final Table table = new HTable(c2, tableName);
Put put = new Put(ROW);
put.add(FAM_NAM, ROW, ROW);
table.put(put);
ManualEnvironmentEdge mee = new ManualEnvironmentEdge();
mee.setValue(System.currentTimeMillis());
EnvironmentEdgeManager.injectEdge(mee);
LOG.info("first get");
table.get(new Get(ROW));
LOG.info("first get - changing the time & sleeping");
mee.incValue(idleTime + 1000);
Thread.sleep(1500); // we need to wait a little for the connection to be seen as idle.
// 1500 = sleep time in RpcClient#waitForWork + a margin
LOG.info("second get - connection has been marked idle in the middle");
// To check that the connection actually became idle would need to read some private
// fields of RpcClient.
table.get(new Get(ROW));
mee.incValue(idleTime + 1000);
LOG.info("third get - connection is idle, but the reader doesn't know yet");
// We're testing here a special case:
// time limit reached BUT connection not yet reclaimed AND a new call.
// in this situation, we don't close the connection, instead we use it immediately.
// If we're very unlucky we can have a race condition in the test: the connection is already
// under closing when we do the get, so we have an exception, and we don't retry as the
// retry number is 1. The probability is very very low, and seems acceptable for now. It's
// a test issue only.
table.get(new Get(ROW));
LOG.info("we're done - time will change back");
table.close();
EnvironmentEdgeManager.reset();
TEST_UTIL.getHBaseAdmin().setBalancerRunning(previousBalance, true);
}
/**
* Test that the connection to the dead server is cut immediately when we receive the
* notification.
* @throws Exception
*/
@Test
public void testConnectionCut() throws Exception {
if (!isJavaOk){
// This test requires jdk 1.7+
return;
}
TableName tableName = TableName.valueOf("HCM-testConnectionCut");
TEST_UTIL.createTable(tableName, FAM_NAM).close();
boolean previousBalance = TEST_UTIL.getHBaseAdmin().setBalancerRunning(false, true);
Configuration c2 = new Configuration(TEST_UTIL.getConfiguration());
// We want to work on a separate connection.
c2.set(HConstants.HBASE_CLIENT_INSTANCE_ID, String.valueOf(-1));
c2.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
c2.setInt(HConstants.HBASE_RPC_TIMEOUT_KEY, 30 * 1000);
HTable table = new HTable(c2, tableName);
Put p = new Put(FAM_NAM);
p.add(FAM_NAM, FAM_NAM, FAM_NAM);
table.put(p);
final HConnectionImplementation hci = (HConnectionImplementation)table.getConnection();
final HRegionLocation loc = table.getRegionLocation(FAM_NAM);
Get get = new Get(FAM_NAM);
Assert.assertNotNull(table.get(get));
get = new Get(FAM_NAM);
get.setFilter(new BlockingFilter());
// This thread will mark the server as dead while we're waiting during a get.
Thread t = new Thread() {
@Override
public void run() {
synchronized (syncBlockingFilter) {
try {
syncBlockingFilter.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
hci.clusterStatusListener.deadServerHandler.newDead(loc.getServerName());
}
};
t.start();
try {
table.get(get);
Assert.fail();
} catch (IOException expected) {
LOG.debug("Received: " + expected);
Assert.assertFalse(expected instanceof SocketTimeoutException);
Assert.assertFalse(syncBlockingFilter.get());
} finally {
syncBlockingFilter.set(true);
t.join();
HConnectionManager.getConnection(c2).close();
TEST_UTIL.getHBaseAdmin().setBalancerRunning(previousBalance, true);
}
table.close();
}
protected static final AtomicBoolean syncBlockingFilter = new AtomicBoolean(false);
public static class BlockingFilter extends FilterBase {
@Override
public boolean filterRowKey(byte[] buffer, int offset, int length) throws IOException {
int i = 0;
while (i++ < 1000 && !syncBlockingFilter.get()) {
synchronized (syncBlockingFilter) {
syncBlockingFilter.notifyAll();
}
Threads.sleep(100);
}
syncBlockingFilter.set(true);
return false;
}
@Override
public ReturnCode filterKeyValue(Cell ignored) throws IOException {
return ReturnCode.INCLUDE;
}
public static Filter parseFrom(final byte [] pbBytes) throws DeserializationException{
return new BlockingFilter();
}
}
@Test
public void abortingHConnectionRemovesItselfFromHCM() throws Exception {
// Save off current HConnections
Map<HConnectionKey, HConnectionImplementation> oldHBaseInstances =
new HashMap<HConnectionKey, HConnectionImplementation>();
oldHBaseInstances.putAll(ConnectionManager.CONNECTION_INSTANCES);
ConnectionManager.CONNECTION_INSTANCES.clear();
try {
HConnection connection = HConnectionManager.getConnection(TEST_UTIL.getConfiguration());
connection.abort("test abortingHConnectionRemovesItselfFromHCM", new Exception(
"test abortingHConnectionRemovesItselfFromHCM"));
Assert.assertNotSame(connection,
HConnectionManager.getConnection(TEST_UTIL.getConfiguration()));
} finally {
// Put original HConnections back
ConnectionManager.CONNECTION_INSTANCES.clear();
ConnectionManager.CONNECTION_INSTANCES.putAll(oldHBaseInstances);
}
}
/**
* Test that when we delete a location using the first row of a region
* that we really delete it.
* @throws Exception
*/
@Test
public void testRegionCaching() throws Exception{
TEST_UTIL.createTable(TABLE_NAME, FAM_NAM).close();
Configuration conf = new Configuration(TEST_UTIL.getConfiguration());
conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
HTable table = new HTable(conf, TABLE_NAME);
TEST_UTIL.createMultiRegions(table, FAM_NAM);
TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
Put put = new Put(ROW);
put.add(FAM_NAM, ROW, ROW);
table.put(put);
ConnectionManager.HConnectionImplementation conn =
(ConnectionManager.HConnectionImplementation)table.getConnection();
assertNotNull(conn.getCachedLocation(TABLE_NAME, ROW));
final int nextPort = conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation().getPort() + 1;
HRegionLocation loc = conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation();
conn.updateCachedLocation(loc.getRegionInfo(), loc.getServerName(),
ServerName.valueOf("127.0.0.1", nextPort,
HConstants.LATEST_TIMESTAMP), HConstants.LATEST_TIMESTAMP);
Assert.assertEquals(conn.getCachedLocation(TABLE_NAME, ROW)
.getRegionLocation().getPort(), nextPort);
conn.clearRegionCache(TABLE_NAME, ROW.clone());
RegionLocations rl = conn.getCachedLocation(TABLE_NAME, ROW);
assertNull("What is this location?? " + rl, rl);
// We're now going to move the region and check that it works for the client
// First a new put to add the location in the cache
conn.clearRegionCache(TABLE_NAME);
Assert.assertEquals(0, conn.getNumberOfCachedRegionLocations(TABLE_NAME));
Put put2 = new Put(ROW);
put2.add(FAM_NAM, ROW, ROW);
table.put(put2);
assertNotNull(conn.getCachedLocation(TABLE_NAME, ROW));
assertNotNull(conn.getCachedLocation(TableName.valueOf(TABLE_NAME.getName()), ROW.clone()));
TEST_UTIL.getHBaseAdmin().setBalancerRunning(false, false);
HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster();
// We can wait for all regions to be online, that makes log reading easier when debugging
while (master.getAssignmentManager().getRegionStates().isRegionsInTransition()) {
Thread.sleep(1);
}
// Now moving the region to the second server
HRegionLocation toMove = conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation();
byte[] regionName = toMove.getRegionInfo().getRegionName();
byte[] encodedRegionNameBytes = toMove.getRegionInfo().getEncodedNameAsBytes();
// Choose the other server.
int curServerId = TEST_UTIL.getHBaseCluster().getServerWith(regionName);
int destServerId = (curServerId == 0 ? 1 : 0);
HRegionServer curServer = TEST_UTIL.getHBaseCluster().getRegionServer(curServerId);
HRegionServer destServer = TEST_UTIL.getHBaseCluster().getRegionServer(destServerId);
ServerName destServerName = destServer.getServerName();
// Check that we are in the expected state
Assert.assertTrue(curServer != destServer);
Assert.assertFalse(curServer.getServerName().equals(destServer.getServerName()));
Assert.assertFalse( toMove.getPort() == destServerName.getPort());
Assert.assertNotNull(curServer.getOnlineRegion(regionName));
Assert.assertNull(destServer.getOnlineRegion(regionName));
Assert.assertFalse(TEST_UTIL.getMiniHBaseCluster().getMaster().
getAssignmentManager().getRegionStates().isRegionsInTransition());
// Moving. It's possible that we don't have all the regions online at this point, so
// the test must depends only on the region we're looking at.
LOG.info("Move starting region="+toMove.getRegionInfo().getRegionNameAsString());
TEST_UTIL.getHBaseAdmin().move(
toMove.getRegionInfo().getEncodedNameAsBytes(),
destServerName.getServerName().getBytes()
);
while (destServer.getOnlineRegion(regionName) == null ||
destServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
curServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
master.getAssignmentManager().getRegionStates().isRegionsInTransition()) {
// wait for the move to be finished
Thread.sleep(1);
}
LOG.info("Move finished for region="+toMove.getRegionInfo().getRegionNameAsString());
// Check our new state.
Assert.assertNull(curServer.getOnlineRegion(regionName));
Assert.assertNotNull(destServer.getOnlineRegion(regionName));
Assert.assertFalse(destServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes));
Assert.assertFalse(curServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes));
// Cache was NOT updated and points to the wrong server
Assert.assertFalse(
conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation()
.getPort() == destServerName.getPort());
// This part relies on a number of tries equals to 1.
// We do a put and expect the cache to be updated, even if we don't retry
LOG.info("Put starting");
Put put3 = new Put(ROW);
put3.add(FAM_NAM, ROW, ROW);
try {
table.put(put3);
Assert.fail("Unreachable point");
} catch (RetriesExhaustedWithDetailsException e){
LOG.info("Put done, exception caught: " + e.getClass());
Assert.assertEquals(1, e.getNumExceptions());
Assert.assertEquals(1, e.getCauses().size());
Assert.assertArrayEquals(e.getRow(0).getRow(), ROW);
// Check that we unserialized the exception as expected
Throwable cause = ConnectionManager.findException(e.getCause(0));
Assert.assertNotNull(cause);
Assert.assertTrue(cause instanceof RegionMovedException);
}
Assert.assertNotNull("Cached connection is null", conn.getCachedLocation(TABLE_NAME, ROW));
Assert.assertEquals(
"Previous server was " + curServer.getServerName().getHostAndPort(),
destServerName.getPort(),
conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation().getPort());
Assert.assertFalse(destServer.getRegionsInTransitionInRS()
.containsKey(encodedRegionNameBytes));
Assert.assertFalse(curServer.getRegionsInTransitionInRS()
.containsKey(encodedRegionNameBytes));
// We move it back to do another test with a scan
LOG.info("Move starting region=" + toMove.getRegionInfo().getRegionNameAsString());
TEST_UTIL.getHBaseAdmin().move(
toMove.getRegionInfo().getEncodedNameAsBytes(),
curServer.getServerName().getServerName().getBytes()
);
while (curServer.getOnlineRegion(regionName) == null ||
destServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
curServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
master.getAssignmentManager().getRegionStates().isRegionsInTransition()) {
// wait for the move to be finished
Thread.sleep(1);
}
// Check our new state.
Assert.assertNotNull(curServer.getOnlineRegion(regionName));
Assert.assertNull(destServer.getOnlineRegion(regionName));
LOG.info("Move finished for region=" + toMove.getRegionInfo().getRegionNameAsString());
// Cache was NOT updated and points to the wrong server
Assert.assertFalse(conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation().getPort() ==
curServer.getServerName().getPort());
Scan sc = new Scan();
sc.setStopRow(ROW);
sc.setStartRow(ROW);
// The scanner takes the max retries from the connection configuration, not the table as
// the put.
TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
try {
ResultScanner rs = table.getScanner(sc);
while (rs.next() != null) {
}
Assert.fail("Unreachable point");
} catch (RetriesExhaustedException e) {
LOG.info("Scan done, expected exception caught: " + e.getClass());
}
// Cache is updated with the right value.
Assert.assertNotNull(conn.getCachedLocation(TABLE_NAME, ROW));
Assert.assertEquals(
"Previous server was "+destServer.getServerName().getHostAndPort(),
curServer.getServerName().getPort(),
conn.getCachedLocation(TABLE_NAME, ROW).getRegionLocation().getPort());
TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER);
table.close();
}
/**
* Test that Connection or Pool are not closed when managed externally
* @throws Exception
*/
@Test
public void testConnectionManagement() throws Exception{
Table table0 = TEST_UTIL.createTable(TABLE_NAME1, FAM_NAM);
Connection conn = ConnectionFactory.createConnection(TEST_UTIL.getConfiguration());
HTable table = (HTable) conn.getTable(TABLE_NAME1);
table.close();
assertFalse(conn.isClosed());
assertFalse(table.getPool().isShutdown());
table = (HTable) conn.getTable(TABLE_NAME1);
table.close();
assertFalse(table.getPool().isShutdown());
conn.close();
assertTrue(table.getPool().isShutdown());
table0.close();
}
/**
* Test that stale cache updates don't override newer cached values.
*/
@Test(timeout = 60000)
public void testCacheSeqNums() throws Exception{
HTable table = TEST_UTIL.createTable(TABLE_NAME2, FAM_NAM);
TEST_UTIL.createMultiRegions(table, FAM_NAM);
Put put = new Put(ROW);
put.add(FAM_NAM, ROW, ROW);
table.put(put);
ConnectionManager.HConnectionImplementation conn =
(ConnectionManager.HConnectionImplementation)table.getConnection();
HRegionLocation location = conn.getCachedLocation(TABLE_NAME2, ROW).getRegionLocation();
assertNotNull(location);
ServerName anySource = ServerName.valueOf(location.getHostname(), location.getPort() - 1, 0L);
// Same server as already in cache reporting - overwrites any value despite seqNum.
int nextPort = location.getPort() + 1;
conn.updateCachedLocation(location.getRegionInfo(), location.getServerName(),
ServerName.valueOf("127.0.0.1", nextPort, 0), location.getSeqNum() - 1);
location = conn.getCachedLocation(TABLE_NAME2, ROW).getRegionLocation();
Assert.assertEquals(nextPort, location.getPort());
// No source specified - same.
nextPort = location.getPort() + 1;
conn.updateCachedLocation(location.getRegionInfo(), location.getServerName(),
ServerName.valueOf("127.0.0.1", nextPort, 0), location.getSeqNum() - 1);
location = conn.getCachedLocation(TABLE_NAME2, ROW).getRegionLocation();
Assert.assertEquals(nextPort, location.getPort());
// Higher seqNum - overwrites lower seqNum.
nextPort = location.getPort() + 1;
conn.updateCachedLocation(location.getRegionInfo(), anySource,
ServerName.valueOf("127.0.0.1", nextPort, 0), location.getSeqNum() + 1);
location = conn.getCachedLocation(TABLE_NAME2, ROW).getRegionLocation();
Assert.assertEquals(nextPort, location.getPort());
// Lower seqNum - does not overwrite higher seqNum.
nextPort = location.getPort() + 1;
conn.updateCachedLocation(location.getRegionInfo(), anySource,
ServerName.valueOf("127.0.0.1", nextPort, 0), location.getSeqNum() - 1);
location = conn.getCachedLocation(TABLE_NAME2, ROW).getRegionLocation();
Assert.assertEquals(nextPort - 1, location.getPort());
table.close();
}
/**
* Make sure that {@link Configuration} instances that are essentially the
* same map to the same {@link HConnection} instance.
*/
@Test
public void testConnectionSameness() throws Exception {
Connection previousConnection = null;
for (int i = 0; i < 2; i++) {
// set random key to differentiate the connection from previous ones
Configuration configuration = TEST_UTIL.getConfiguration();
configuration.set("some_key", String.valueOf(_randy.nextInt()));
LOG.info("The hash code of the current configuration is: "
+ configuration.hashCode());
Connection currentConnection = HConnectionManager
.getConnection(configuration);
if (previousConnection != null) {
assertTrue(
"Did not get the same connection even though its key didn't change",
previousConnection == currentConnection);
}
previousConnection = currentConnection;
// change the configuration, so that it is no longer reachable from the
// client's perspective. However, since its part of the LRU doubly linked
// list, it will eventually get thrown out, at which time it should also
// close the corresponding {@link HConnection}.
configuration.set("other_key", String.valueOf(_randy.nextInt()));
}
}
/**
* Makes sure that there is no leaking of
* {@link ConnectionManager.HConnectionImplementation} in the {@link HConnectionManager}
* class.
* @deprecated Tests deprecated functionality. Remove in 1.0.
*/
@Deprecated
@Test
public void testConnectionUniqueness() throws Exception {
int zkmaxconnections = TEST_UTIL.getConfiguration().
getInt(HConstants.ZOOKEEPER_MAX_CLIENT_CNXNS,
HConstants.DEFAULT_ZOOKEPER_MAX_CLIENT_CNXNS);
// Test up to a max that is < the maximum number of zk connections. If we
// go above zk connections, we just fall into cycle where we are failing
// to set up a session and test runs for a long time.
int maxConnections = Math.min(zkmaxconnections - 1, 20);
List<HConnection> connections = new ArrayList<HConnection>(maxConnections);
Connection previousConnection = null;
try {
for (int i = 0; i < maxConnections; i++) {
// set random key to differentiate the connection from previous ones
Configuration configuration = new Configuration(TEST_UTIL.getConfiguration());
configuration.set("some_key", String.valueOf(_randy.nextInt()));
configuration.set(HConstants.HBASE_CLIENT_INSTANCE_ID,
String.valueOf(_randy.nextInt()));
LOG.info("The hash code of the current configuration is: "
+ configuration.hashCode());
HConnection currentConnection =
HConnectionManager.getConnection(configuration);
if (previousConnection != null) {
assertTrue("Got the same connection even though its key changed!",
previousConnection != currentConnection);
}
// change the configuration, so that it is no longer reachable from the
// client's perspective. However, since its part of the LRU doubly linked
// list, it will eventually get thrown out, at which time it should also
// close the corresponding {@link HConnection}.
configuration.set("other_key", String.valueOf(_randy.nextInt()));
previousConnection = currentConnection;
LOG.info("The current HConnectionManager#HBASE_INSTANCES cache size is: "
+ getHConnectionManagerCacheSize());
Thread.sleep(50);
connections.add(currentConnection);
}
} finally {
for (Connection c: connections) {
// Clean up connections made so we don't interfere w/ subsequent tests.
HConnectionManager.deleteConnection(c.getConfiguration());
}
}
}
@Test
public void testClosing() throws Exception {
Configuration configuration =
new Configuration(TEST_UTIL.getConfiguration());
configuration.set(HConstants.HBASE_CLIENT_INSTANCE_ID,
String.valueOf(_randy.nextInt()));
Connection c1 = ConnectionFactory.createConnection(configuration);
// We create two connections with the same key.
Connection c2 = ConnectionFactory.createConnection(configuration);
Connection c3 = HConnectionManager.getConnection(configuration);
Connection c4 = HConnectionManager.getConnection(configuration);
assertTrue(c3 == c4);
c1.close();
assertTrue(c1.isClosed());
assertFalse(c2.isClosed());
assertFalse(c3.isClosed());
c3.close();
// still a reference left
assertFalse(c3.isClosed());
c3.close();
assertTrue(c3.isClosed());
// c3 was removed from the cache
Connection c5 = HConnectionManager.getConnection(configuration);
assertTrue(c5 != c3);
assertFalse(c2.isClosed());
c2.close();
assertTrue(c2.isClosed());
c5.close();
assertTrue(c5.isClosed());
}
/**
* Trivial test to verify that nobody messes with
* {@link HConnectionManager#createConnection(Configuration)}
*/
@Test
public void testCreateConnection() throws Exception {
Configuration configuration = TEST_UTIL.getConfiguration();
Connection c1 = ConnectionFactory.createConnection(configuration);
Connection c2 = ConnectionFactory.createConnection(configuration);
// created from the same configuration, yet they are different
assertTrue(c1 != c2);
assertTrue(c1.getConfiguration() == c2.getConfiguration());
// make sure these were not cached
Connection c3 = HConnectionManager.getConnection(configuration);
assertTrue(c1 != c3);
assertTrue(c2 != c3);
}
/**
* This test checks that one can connect to the cluster with only the
* ZooKeeper quorum set. Other stuff like master address will be read
* from ZK by the client.
*/
@Test(timeout = 60000)
public void testConnection() throws Exception{
// We create an empty config and add the ZK address.
Configuration c = new Configuration();
c.set(HConstants.ZOOKEEPER_QUORUM,
TEST_UTIL.getConfiguration().get(HConstants.ZOOKEEPER_QUORUM));
c.set(HConstants.ZOOKEEPER_CLIENT_PORT ,
TEST_UTIL.getConfiguration().get(HConstants.ZOOKEEPER_CLIENT_PORT));
// This should be enough to connect
HConnection conn = HConnectionManager.getConnection(c);
assertTrue( conn.isMasterRunning() );
conn.close();
}
private int setNumTries(HConnectionImplementation hci, int newVal) throws Exception {
Field numTries = hci.getClass().getDeclaredField("numTries");
numTries.setAccessible(true);
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(numTries, numTries.getModifiers() & ~Modifier.FINAL);
final int prevNumRetriesVal = (Integer)numTries.get(hci);
numTries.set(hci, newVal);
return prevNumRetriesVal;
}
@Test (timeout=30000)
public void testMulti() throws Exception {
HTable table = TEST_UTIL.createTable(TABLE_NAME3, FAM_NAM);
try {
TEST_UTIL.createMultiRegions(table, FAM_NAM);
ConnectionManager.HConnectionImplementation conn =
( ConnectionManager.HConnectionImplementation)table.getConnection();
// We're now going to move the region and check that it works for the client
// First a new put to add the location in the cache
conn.clearRegionCache(TABLE_NAME3);
Assert.assertEquals(0, conn.getNumberOfCachedRegionLocations(TABLE_NAME3));
TEST_UTIL.getHBaseAdmin().setBalancerRunning(false, false);
HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster();
// We can wait for all regions to be online, that makes log reading easier when debugging
while (master.getAssignmentManager().getRegionStates().isRegionsInTransition()) {
Thread.sleep(1);
}
Put put = new Put(ROW_X);
put.add(FAM_NAM, ROW_X, ROW_X);
table.put(put);
// Now moving the region to the second server
HRegionLocation toMove = conn.getCachedLocation(TABLE_NAME3, ROW_X).getRegionLocation();
byte[] regionName = toMove.getRegionInfo().getRegionName();
byte[] encodedRegionNameBytes = toMove.getRegionInfo().getEncodedNameAsBytes();
// Choose the other server.
int curServerId = TEST_UTIL.getHBaseCluster().getServerWith(regionName);
int destServerId = (curServerId == 0 ? 1 : 0);
HRegionServer curServer = TEST_UTIL.getHBaseCluster().getRegionServer(curServerId);
HRegionServer destServer = TEST_UTIL.getHBaseCluster().getRegionServer(destServerId);
ServerName destServerName = destServer.getServerName();
//find another row in the cur server that is less than ROW_X
List<HRegion> regions = curServer.getOnlineRegions(TABLE_NAME3);
byte[] otherRow = null;
for (HRegion region : regions) {
if (!region.getRegionInfo().getEncodedName().equals(toMove.getRegionInfo().getEncodedName())
&& Bytes.BYTES_COMPARATOR.compare(region.getRegionInfo().getStartKey(), ROW_X) < 0) {
otherRow = region.getRegionInfo().getStartKey();
break;
}
}
assertNotNull(otherRow);
// If empty row, set it to first row.-f
if (otherRow.length <= 0) otherRow = Bytes.toBytes("aaa");
Put put2 = new Put(otherRow);
put2.add(FAM_NAM, otherRow, otherRow);
table.put(put2); //cache put2's location
// Check that we are in the expected state
Assert.assertTrue(curServer != destServer);
Assert.assertNotEquals(curServer.getServerName(), destServer.getServerName());
Assert.assertNotEquals(toMove.getPort(), destServerName.getPort());
Assert.assertNotNull(curServer.getOnlineRegion(regionName));
Assert.assertNull(destServer.getOnlineRegion(regionName));
Assert.assertFalse(TEST_UTIL.getMiniHBaseCluster().getMaster().
getAssignmentManager().getRegionStates().isRegionsInTransition());
// Moving. It's possible that we don't have all the regions online at this point, so
// the test must depends only on the region we're looking at.
LOG.info("Move starting region="+toMove.getRegionInfo().getRegionNameAsString());
TEST_UTIL.getHBaseAdmin().move(
toMove.getRegionInfo().getEncodedNameAsBytes(),
destServerName.getServerName().getBytes()
);
while (destServer.getOnlineRegion(regionName) == null ||
destServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
curServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes) ||
master.getAssignmentManager().getRegionStates().isRegionsInTransition()) {
// wait for the move to be finished
Thread.sleep(1);
}
LOG.info("Move finished for region="+toMove.getRegionInfo().getRegionNameAsString());
// Check our new state.
Assert.assertNull(curServer.getOnlineRegion(regionName));
Assert.assertNotNull(destServer.getOnlineRegion(regionName));
Assert.assertFalse(destServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes));
Assert.assertFalse(curServer.getRegionsInTransitionInRS().containsKey(encodedRegionNameBytes));
// Cache was NOT updated and points to the wrong server
Assert.assertFalse(
conn.getCachedLocation(TABLE_NAME3, ROW_X).getRegionLocation()
.getPort() == destServerName.getPort());
// Hijack the number of retry to fail after 2 tries
final int prevNumRetriesVal = setNumTries(conn, 2);
Put put3 = new Put(ROW_X);
put3.add(FAM_NAM, ROW_X, ROW_X);
Put put4 = new Put(otherRow);
put4.add(FAM_NAM, otherRow, otherRow);
// do multi
table.batch(Lists.newArrayList(put4, put3)); // first should be a valid row,
// second we get RegionMovedException.
setNumTries(conn, prevNumRetriesVal);
} finally {
table.close();
}
}
@Ignore ("Test presumes RETRY_BACKOFF will never change; it has") @Test
public void testErrorBackoffTimeCalculation() throws Exception {
// TODO: This test would seem to presume hardcoded RETRY_BACKOFF which it should not.
final long ANY_PAUSE = 100;
ServerName location = ServerName.valueOf("127.0.0.1", 1, 0);
ServerName diffLocation = ServerName.valueOf("127.0.0.1", 2, 0);
ManualEnvironmentEdge timeMachine = new ManualEnvironmentEdge();
EnvironmentEdgeManager.injectEdge(timeMachine);
try {
long timeBase = timeMachine.currentTime();
long largeAmountOfTime = ANY_PAUSE * 1000;
ConnectionManager.ServerErrorTracker tracker =
new ConnectionManager.ServerErrorTracker(largeAmountOfTime, 100);
// The default backoff is 0.
assertEquals(0, tracker.calculateBackoffTime(location, ANY_PAUSE));
// Check some backoff values from HConstants sequence.
tracker.reportServerError(location);
assertEqualsWithJitter(ANY_PAUSE, tracker.calculateBackoffTime(location, ANY_PAUSE));
tracker.reportServerError(location);
tracker.reportServerError(location);
tracker.reportServerError(location);
assertEqualsWithJitter(ANY_PAUSE * 5, tracker.calculateBackoffTime(location, ANY_PAUSE));
// All of this shouldn't affect backoff for different location.
assertEquals(0, tracker.calculateBackoffTime(diffLocation, ANY_PAUSE));
tracker.reportServerError(diffLocation);
assertEqualsWithJitter(ANY_PAUSE, tracker.calculateBackoffTime(diffLocation, ANY_PAUSE));
// Check with different base.
assertEqualsWithJitter(ANY_PAUSE * 10,
tracker.calculateBackoffTime(location, ANY_PAUSE * 2));
// See that time from last error is taken into account. Time shift is applied after jitter,
// so pass the original expected backoff as the base for jitter.
long timeShift = (long)(ANY_PAUSE * 0.5);
timeMachine.setValue(timeBase + timeShift);
assertEqualsWithJitter((ANY_PAUSE * 5) - timeShift,
tracker.calculateBackoffTime(location, ANY_PAUSE), ANY_PAUSE * 2);
// However we should not go into negative.
timeMachine.setValue(timeBase + ANY_PAUSE * 100);
assertEquals(0, tracker.calculateBackoffTime(location, ANY_PAUSE));
// We also should not go over the boundary; last retry would be on it.
long timeLeft = (long)(ANY_PAUSE * 0.5);
timeMachine.setValue(timeBase + largeAmountOfTime - timeLeft);
assertTrue(tracker.canRetryMore(1));
tracker.reportServerError(location);
assertEquals(timeLeft, tracker.calculateBackoffTime(location, ANY_PAUSE));
timeMachine.setValue(timeBase + largeAmountOfTime);
assertFalse(tracker.canRetryMore(1));
} finally {
EnvironmentEdgeManager.reset();
}
}
private static void assertEqualsWithJitter(long expected, long actual) {
assertEqualsWithJitter(expected, actual, expected);
}
private static void assertEqualsWithJitter(long expected, long actual, long jitterBase) {
assertTrue("Value not within jitter: " + expected + " vs " + actual,
Math.abs(actual - expected) <= (0.01f * jitterBase));
}
/**
* Tests that a destroyed connection does not have a live zookeeper.
* Below is timing based. We put up a connection to a table and then close the connection while
* having a background thread running that is forcing close of the connection to try and
* provoke a close catastrophe; we are hoping for a car crash so we can see if we are leaking
* zk connections.
* @throws Exception
*/
@Ignore ("Flakey test: See HBASE-8996")@Test
public void testDeleteForZKConnLeak() throws Exception {
TEST_UTIL.createTable(TABLE_NAME4, FAM_NAM);
final Configuration config = HBaseConfiguration.create(TEST_UTIL.getConfiguration());
config.setInt("zookeeper.recovery.retry", 1);
config.setInt("zookeeper.recovery.retry.intervalmill", 1000);
config.setInt("hbase.rpc.timeout", 2000);
config.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
ThreadPoolExecutor pool = new ThreadPoolExecutor(1, 10,
5, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>(),
Threads.newDaemonThreadFactory("test-hcm-delete"));
pool.submit(new Runnable() {
@Override
public void run() {
while (!Thread.interrupted()) {
try {
HConnection conn = HConnectionManager.getConnection(config);
LOG.info("Connection " + conn);
HConnectionManager.deleteStaleConnection(conn);
LOG.info("Connection closed " + conn);
// TODO: This sleep time should be less than the time that it takes to open and close
// a table. Ideally we would do a few runs first to measure. For now this is
// timing based; hopefully we hit the bad condition.
Threads.sleep(10);
} catch (Exception e) {
}
}
}
});
// Use connection multiple times.
for (int i = 0; i < 30; i++) {
Connection c1 = null;
try {
c1 = ConnectionManager.getConnectionInternal(config);
LOG.info("HTable connection " + i + " " + c1);
Table table = new HTable(config, TABLE_NAME4, pool);
table.close();
LOG.info("HTable connection " + i + " closed " + c1);
} catch (Exception e) {
LOG.info("We actually want this to happen!!!! So we can see if we are leaking zk", e);
} finally {
if (c1 != null) {
if (c1.isClosed()) {
// cannot use getZooKeeper as method instantiates watcher if null
Field zkwField = c1.getClass().getDeclaredField("keepAliveZookeeper");
zkwField.setAccessible(true);
Object watcher = zkwField.get(c1);
if (watcher != null) {
if (((ZooKeeperWatcher)watcher).getRecoverableZooKeeper().getState().isAlive()) {
// non-synchronized access to watcher; sleep and check again in case zk connection
// hasn't been cleaned up yet.
Thread.sleep(1000);
if (((ZooKeeperWatcher) watcher).getRecoverableZooKeeper().getState().isAlive()) {
pool.shutdownNow();
fail("Live zookeeper in closed connection");
}
}
}
}
c1.close();
}
}
}
pool.shutdownNow();
}
@Test(timeout = 60000)
public void testConnectionRideOverClusterRestart() throws IOException, InterruptedException {
Configuration config = new Configuration(TEST_UTIL.getConfiguration());
TableName tableName = TableName.valueOf("testConnectionRideOverClusterRestart");
TEST_UTIL.createTable(tableName.getName(), new byte[][] {FAM_NAM}, config).close();
Connection connection = ConnectionFactory.createConnection(config);
Table table = connection.getTable(tableName);
// this will cache the meta location and table's region location
table.get(new Get(Bytes.toBytes("foo")));
// restart HBase
TEST_UTIL.shutdownMiniHBaseCluster();
TEST_UTIL.restartHBaseCluster(2);
// this should be able to discover new locations for meta and table's region
table.get(new Get(Bytes.toBytes("foo")));
TEST_UTIL.deleteTable(tableName);
table.close();
connection.close();
}
}