/**
*
* 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.util;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Throwables;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
import edu.umd.cs.findbugs.annotations.CheckForNull;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.EOFException;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Vector;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hbase.ClusterId;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HDFSBlocksDistribution;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.io.HFileLink;
import org.apache.hadoop.hbase.master.HMaster;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.StoreFileInfo;
import org.apache.hadoop.hbase.security.AccessDeniedException;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.FSProtos;
import org.apache.hadoop.hbase.util.HBaseFsck.ErrorReporter;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.DFSHedgedReadMetrics;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.Progressable;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.StringUtils;
import static org.apache.hadoop.hbase.HConstants.HBASE_DIR;
/**
* Utility methods for interacting with the underlying file system.
*/
@InterfaceAudience.Private
public abstract class FSUtils {
private static final Log LOG = LogFactory.getLog(FSUtils.class);
/** Full access permissions (starting point for a umask) */
public static final String FULL_RWX_PERMISSIONS = "777";
private static final String THREAD_POOLSIZE = "hbase.client.localityCheck.threadPoolSize";
private static final int DEFAULT_THREAD_POOLSIZE = 2;
/** Set to true on Windows platforms */
public static final boolean WINDOWS = System.getProperty("os.name").startsWith("Windows");
protected FSUtils() {
super();
}
/**
* Sets storage policy for given path according to config setting.
* If the passed path is a directory, we'll set the storage policy for all files
* created in the future in said directory. Note that this change in storage
* policy takes place at the HDFS level; it will persist beyond this RS's lifecycle.
* If we're running on a version of HDFS that doesn't support the given storage policy
* (or storage policies at all), then we'll issue a log message and continue.
*
* See http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html
*
* @param fs We only do anything if an instance of DistributedFileSystem
* @param conf used to look up storage policy with given key; not modified.
* @param path the Path whose storage policy is to be set
* @param policyKey Key to use pulling a policy from Configuration:
* e.g. HConstants.WAL_STORAGE_POLICY (hbase.wal.storage.policy).
* @param defaultPolicy usually should be the policy NONE to delegate to HDFS
*/
public static void setStoragePolicy(final FileSystem fs, final Configuration conf,
final Path path, final String policyKey, final String defaultPolicy) {
String storagePolicy = conf.get(policyKey, defaultPolicy).toUpperCase(Locale.ROOT);
if (storagePolicy.equals(defaultPolicy)) {
if (LOG.isTraceEnabled()) {
LOG.trace("default policy of " + defaultPolicy + " requested, exiting early.");
}
return;
}
setStoragePolicy(fs, path, storagePolicy);
}
private static final Map<FileSystem, Boolean> warningMap =
new ConcurrentHashMap<FileSystem, Boolean>();
/**
* Sets storage policy for given path.
* If the passed path is a directory, we'll set the storage policy for all files
* created in the future in said directory. Note that this change in storage
* policy takes place at the HDFS level; it will persist beyond this RS's lifecycle.
* If we're running on a version of HDFS that doesn't support the given storage policy
* (or storage policies at all), then we'll issue a log message and continue.
*
* See http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html
*
* @param fs We only do anything if an instance of DistributedFileSystem
* @param path the Path whose storage policy is to be set
* @param storagePolicy Policy to set on <code>path</code>; see hadoop 2.6+
* org.apache.hadoop.hdfs.protocol.HdfsConstants for possible list e.g
* 'COLD', 'WARM', 'HOT', 'ONE_SSD', 'ALL_SSD', 'LAZY_PERSIST'.
*/
public static void setStoragePolicy(final FileSystem fs, final Path path,
final String storagePolicy) {
if (storagePolicy == null) {
if (LOG.isTraceEnabled()) {
LOG.trace("We were passed a null storagePolicy, exiting early.");
}
return;
}
final String trimmedStoragePolicy = storagePolicy.trim();
if (trimmedStoragePolicy.isEmpty()) {
if (LOG.isTraceEnabled()) {
LOG.trace("We were passed an empty storagePolicy, exiting early.");
}
return;
}
boolean distributed = false;
try {
distributed = isDistributedFileSystem(fs);
} catch (IOException ioe) {
if (!warningMap.containsKey(fs)) {
warningMap.put(fs, true);
LOG.warn("FileSystem isn't an instance of DistributedFileSystem; presuming it doesn't "
+ "support setStoragePolicy. Unable to set storagePolicy=" + trimmedStoragePolicy
+ " on path=" + path);
} else if (LOG.isDebugEnabled()) {
LOG.debug("FileSystem isn't an instance of DistributedFileSystem; presuming it doesn't "
+ "support setStoragePolicy. Unable to set storagePolicy=" + trimmedStoragePolicy
+ " on path=" + path);
}
return;
}
if (distributed) {
invokeSetStoragePolicy(fs, path, trimmedStoragePolicy);
}
}
/*
* All args have been checked and are good. Run the setStoragePolicy invocation.
*/
private static void invokeSetStoragePolicy(final FileSystem fs, final Path path,
final String storagePolicy) {
Method m = null;
try {
m = fs.getClass().getDeclaredMethod("setStoragePolicy",
new Class<?>[] { Path.class, String.class });
m.setAccessible(true);
} catch (NoSuchMethodException e) {
final String msg = "FileSystem doesn't support setStoragePolicy; HDFS-6584 not available";
if (!warningMap.containsKey(fs)) {
warningMap.put(fs, true);
LOG.warn(msg, e);
} else if (LOG.isDebugEnabled()) {
LOG.debug(msg, e);
}
m = null;
} catch (SecurityException e) {
final String msg = "No access to setStoragePolicy on FileSystem; HDFS-6584 not available";
if (!warningMap.containsKey(fs)) {
warningMap.put(fs, true);
LOG.warn(msg, e);
} else if (LOG.isDebugEnabled()) {
LOG.debug(msg, e);
}
m = null; // could happen on setAccessible()
}
if (m != null) {
try {
m.invoke(fs, path, storagePolicy);
if (LOG.isDebugEnabled()) {
LOG.debug("Set storagePolicy=" + storagePolicy + " for path=" + path);
}
} catch (Exception e) {
// This swallows FNFE, should we be throwing it? seems more likely to indicate dev
// misuse than a runtime problem with HDFS.
if (!warningMap.containsKey(fs)) {
warningMap.put(fs, true);
LOG.warn("Unable to set storagePolicy=" + storagePolicy + " for path=" + path, e);
} else if (LOG.isDebugEnabled()) {
LOG.debug("Unable to set storagePolicy=" + storagePolicy + " for path=" + path, e);
}
// check for lack of HDFS-7228
if (e instanceof InvocationTargetException) {
final Throwable exception = e.getCause();
if (exception instanceof RemoteException &&
HadoopIllegalArgumentException.class.getName().equals(
((RemoteException)exception).getClassName())) {
if (LOG.isDebugEnabled()) {
LOG.debug("Given storage policy, '" +storagePolicy +"', was rejected and probably " +
"isn't a valid policy for the version of Hadoop you're running. I.e. if you're " +
"trying to use SSD related policies then you're likely missing HDFS-7228. For " +
"more information see the 'ArchivalStorage' docs for your Hadoop release.");
}
}
}
}
}
}
/**
* @return True is <code>fs</code> is instance of DistributedFileSystem
* @throws IOException
*/
public static boolean isDistributedFileSystem(final FileSystem fs) throws IOException {
FileSystem fileSystem = fs;
// If passed an instance of HFileSystem, it fails instanceof DistributedFileSystem.
// Check its backing fs for dfs-ness.
if (fs instanceof HFileSystem) {
fileSystem = ((HFileSystem)fs).getBackingFs();
}
return fileSystem instanceof DistributedFileSystem;
}
/**
* Compare of path component. Does not consider schema; i.e. if schemas
* different but <code>path</code> starts with <code>rootPath</code>,
* then the function returns true
* @param rootPath
* @param path
* @return True if <code>path</code> starts with <code>rootPath</code>
*/
public static boolean isStartingWithPath(final Path rootPath, final String path) {
String uriRootPath = rootPath.toUri().getPath();
String tailUriPath = (new Path(path)).toUri().getPath();
return tailUriPath.startsWith(uriRootPath);
}
/**
* Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the
* '/a/b/c' part. Does not consider schema; i.e. if schemas different but path or subpath matches,
* the two will equate.
* @param pathToSearch Path we will be trying to match.
* @param pathTail
* @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code>
*/
public static boolean isMatchingTail(final Path pathToSearch, String pathTail) {
return isMatchingTail(pathToSearch, new Path(pathTail));
}
/**
* Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the
* '/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. Does not consider
* schema; i.e. if schemas different but path or subpath matches, the two will equate.
* @param pathToSearch Path we will be trying to match.
* @param pathTail
* @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code>
*/
public static boolean isMatchingTail(final Path pathToSearch, final Path pathTail) {
if (pathToSearch.depth() != pathTail.depth()) return false;
Path tailPath = pathTail;
String tailName;
Path toSearch = pathToSearch;
String toSearchName;
boolean result = false;
do {
tailName = tailPath.getName();
if (tailName == null || tailName.length() <= 0) {
result = true;
break;
}
toSearchName = toSearch.getName();
if (toSearchName == null || toSearchName.length() <= 0) break;
// Move up a parent on each path for next go around. Path doesn't let us go off the end.
tailPath = tailPath.getParent();
toSearch = toSearch.getParent();
} while(tailName.equals(toSearchName));
return result;
}
public static FSUtils getInstance(FileSystem fs, Configuration conf) {
String scheme = fs.getUri().getScheme();
if (scheme == null) {
LOG.warn("Could not find scheme for uri " +
fs.getUri() + ", default to hdfs");
scheme = "hdfs";
}
Class<?> fsUtilsClass = conf.getClass("hbase.fsutil." +
scheme + ".impl", FSHDFSUtils.class); // Default to HDFS impl
FSUtils fsUtils = (FSUtils)ReflectionUtils.newInstance(fsUtilsClass, conf);
return fsUtils;
}
/**
* Delete if exists.
* @param fs filesystem object
* @param dir directory to delete
* @return True if deleted <code>dir</code>
* @throws IOException e
*/
public static boolean deleteDirectory(final FileSystem fs, final Path dir)
throws IOException {
return fs.exists(dir) && fs.delete(dir, true);
}
/**
* Delete the region directory if exists.
* @param conf
* @param hri
* @return True if deleted the region directory.
* @throws IOException
*/
public static boolean deleteRegionDir(final Configuration conf, final HRegionInfo hri)
throws IOException {
Path rootDir = getRootDir(conf);
FileSystem fs = rootDir.getFileSystem(conf);
return deleteDirectory(fs,
new Path(getTableDir(rootDir, hri.getTable()), hri.getEncodedName()));
}
/**
* Return the number of bytes that large input files should be optimally
* be split into to minimize i/o time.
*
* use reflection to search for getDefaultBlockSize(Path f)
* if the method doesn't exist, fall back to using getDefaultBlockSize()
*
* @param fs filesystem object
* @return the default block size for the path's filesystem
* @throws IOException e
*/
public static long getDefaultBlockSize(final FileSystem fs, final Path path) throws IOException {
Method m = null;
Class<? extends FileSystem> cls = fs.getClass();
try {
m = cls.getMethod("getDefaultBlockSize", new Class<?>[] { Path.class });
} catch (NoSuchMethodException e) {
LOG.info("FileSystem doesn't support getDefaultBlockSize");
} catch (SecurityException e) {
LOG.info("Doesn't have access to getDefaultBlockSize on FileSystems", e);
m = null; // could happen on setAccessible()
}
if (m == null) {
return fs.getDefaultBlockSize(path);
} else {
try {
Object ret = m.invoke(fs, path);
return ((Long)ret).longValue();
} catch (Exception e) {
throw new IOException(e);
}
}
}
/*
* Get the default replication.
*
* use reflection to search for getDefaultReplication(Path f)
* if the method doesn't exist, fall back to using getDefaultReplication()
*
* @param fs filesystem object
* @param f path of file
* @return default replication for the path's filesystem
* @throws IOException e
*/
public static short getDefaultReplication(final FileSystem fs, final Path path) throws IOException {
Method m = null;
Class<? extends FileSystem> cls = fs.getClass();
try {
m = cls.getMethod("getDefaultReplication", new Class<?>[] { Path.class });
} catch (NoSuchMethodException e) {
LOG.info("FileSystem doesn't support getDefaultReplication");
} catch (SecurityException e) {
LOG.info("Doesn't have access to getDefaultReplication on FileSystems", e);
m = null; // could happen on setAccessible()
}
if (m == null) {
return fs.getDefaultReplication(path);
} else {
try {
Object ret = m.invoke(fs, path);
return ((Number)ret).shortValue();
} catch (Exception e) {
throw new IOException(e);
}
}
}
/**
* Returns the default buffer size to use during writes.
*
* The size of the buffer should probably be a multiple of hardware
* page size (4096 on Intel x86), and it determines how much data is
* buffered during read and write operations.
*
* @param fs filesystem object
* @return default buffer size to use during writes
*/
public static int getDefaultBufferSize(final FileSystem fs) {
return fs.getConf().getInt("io.file.buffer.size", 4096);
}
/**
* Create the specified file on the filesystem. By default, this will:
* <ol>
* <li>overwrite the file if it exists</li>
* <li>apply the umask in the configuration (if it is enabled)</li>
* <li>use the fs configured buffer size (or 4096 if not set)</li>
* <li>use the configured column family replication or default replication if
* {@link HColumnDescriptor#DEFAULT_DFS_REPLICATION}</li>
* <li>use the default block size</li>
* <li>not track progress</li>
* </ol>
* @param conf configurations
* @param fs {@link FileSystem} on which to write the file
* @param path {@link Path} to the file to write
* @param perm permissions
* @param favoredNodes
* @return output stream to the created file
* @throws IOException if the file cannot be created
*/
public static FSDataOutputStream create(Configuration conf, FileSystem fs, Path path,
FsPermission perm, InetSocketAddress[] favoredNodes) throws IOException {
if (fs instanceof HFileSystem) {
FileSystem backingFs = ((HFileSystem)fs).getBackingFs();
if (backingFs instanceof DistributedFileSystem) {
// Try to use the favoredNodes version via reflection to allow backwards-
// compatibility.
short replication = Short.parseShort(conf.get(HColumnDescriptor.DFS_REPLICATION,
String.valueOf(HColumnDescriptor.DEFAULT_DFS_REPLICATION)));
try {
return (FSDataOutputStream) (DistributedFileSystem.class.getDeclaredMethod("create",
Path.class, FsPermission.class, boolean.class, int.class, short.class, long.class,
Progressable.class, InetSocketAddress[].class).invoke(backingFs, path, perm, true,
getDefaultBufferSize(backingFs),
replication > 0 ? replication : getDefaultReplication(backingFs, path),
getDefaultBlockSize(backingFs, path), null, favoredNodes));
} catch (InvocationTargetException ite) {
// Function was properly called, but threw it's own exception.
throw new IOException(ite.getCause());
} catch (NoSuchMethodException e) {
LOG.debug("DFS Client does not support most favored nodes create; using default create");
if (LOG.isTraceEnabled()) LOG.trace("Ignoring; use default create", e);
} catch (IllegalArgumentException e) {
LOG.debug("Ignoring (most likely Reflection related exception) " + e);
} catch (SecurityException e) {
LOG.debug("Ignoring (most likely Reflection related exception) " + e);
} catch (IllegalAccessException e) {
LOG.debug("Ignoring (most likely Reflection related exception) " + e);
}
}
}
return create(fs, path, perm, true);
}
/**
* Create the specified file on the filesystem. By default, this will:
* <ol>
* <li>apply the umask in the configuration (if it is enabled)</li>
* <li>use the fs configured buffer size (or 4096 if not set)</li>
* <li>use the default replication</li>
* <li>use the default block size</li>
* <li>not track progress</li>
* </ol>
*
* @param fs {@link FileSystem} on which to write the file
* @param path {@link Path} to the file to write
* @param perm
* @param overwrite Whether or not the created file should be overwritten.
* @return output stream to the created file
* @throws IOException if the file cannot be created
*/
public static FSDataOutputStream create(FileSystem fs, Path path,
FsPermission perm, boolean overwrite) throws IOException {
if (LOG.isTraceEnabled()) {
LOG.trace("Creating file=" + path + " with permission=" + perm + ", overwrite=" + overwrite);
}
return fs.create(path, perm, overwrite, getDefaultBufferSize(fs),
getDefaultReplication(fs, path), getDefaultBlockSize(fs, path), null);
}
/**
* Get the file permissions specified in the configuration, if they are
* enabled.
*
* @param fs filesystem that the file will be created on.
* @param conf configuration to read for determining if permissions are
* enabled and which to use
* @param permssionConfKey property key in the configuration to use when
* finding the permission
* @return the permission to use when creating a new file on the fs. If
* special permissions are not specified in the configuration, then
* the default permissions on the the fs will be returned.
*/
public static FsPermission getFilePermissions(final FileSystem fs,
final Configuration conf, final String permssionConfKey) {
boolean enablePermissions = conf.getBoolean(
HConstants.ENABLE_DATA_FILE_UMASK, false);
if (enablePermissions) {
try {
FsPermission perm = new FsPermission(FULL_RWX_PERMISSIONS);
// make sure that we have a mask, if not, go default.
String mask = conf.get(permssionConfKey);
if (mask == null)
return FsPermission.getFileDefault();
// appy the umask
FsPermission umask = new FsPermission(mask);
return perm.applyUMask(umask);
} catch (IllegalArgumentException e) {
LOG.warn(
"Incorrect umask attempted to be created: "
+ conf.get(permssionConfKey)
+ ", using default file permissions.", e);
return FsPermission.getFileDefault();
}
}
return FsPermission.getFileDefault();
}
/**
* Checks to see if the specified file system is available
*
* @param fs filesystem
* @throws IOException e
*/
public static void checkFileSystemAvailable(final FileSystem fs)
throws IOException {
if (!(fs instanceof DistributedFileSystem)) {
return;
}
IOException exception = null;
DistributedFileSystem dfs = (DistributedFileSystem) fs;
try {
if (dfs.exists(new Path("/"))) {
return;
}
} catch (IOException e) {
exception = e instanceof RemoteException ?
((RemoteException)e).unwrapRemoteException() : e;
}
try {
fs.close();
} catch (Exception e) {
LOG.error("file system close failed: ", e);
}
IOException io = new IOException("File system is not available");
io.initCause(exception);
throw io;
}
/**
* We use reflection because {@link DistributedFileSystem#setSafeMode(
* HdfsConstants.SafeModeAction action, boolean isChecked)} is not in hadoop 1.1
*
* @param dfs
* @return whether we're in safe mode
* @throws IOException
*/
private static boolean isInSafeMode(DistributedFileSystem dfs) throws IOException {
boolean inSafeMode = false;
try {
Method m = DistributedFileSystem.class.getMethod("setSafeMode", new Class<?> []{
org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.class, boolean.class});
inSafeMode = (Boolean) m.invoke(dfs,
org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.SAFEMODE_GET, true);
} catch (Exception e) {
if (e instanceof IOException) throw (IOException) e;
// Check whether dfs is on safemode.
inSafeMode = dfs.setSafeMode(
org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.SAFEMODE_GET);
}
return inSafeMode;
}
/**
* Check whether dfs is in safemode.
* @param conf
* @throws IOException
*/
public static void checkDfsSafeMode(final Configuration conf)
throws IOException {
boolean isInSafeMode = false;
FileSystem fs = FileSystem.get(conf);
if (fs instanceof DistributedFileSystem) {
DistributedFileSystem dfs = (DistributedFileSystem)fs;
isInSafeMode = isInSafeMode(dfs);
}
if (isInSafeMode) {
throw new IOException("File system is in safemode, it can't be written now");
}
}
/**
* Verifies current version of file system
*
* @param fs filesystem object
* @param rootdir root hbase directory
* @return null if no version file exists, version string otherwise.
* @throws IOException e
* @throws org.apache.hadoop.hbase.exceptions.DeserializationException
*/
public static String getVersion(FileSystem fs, Path rootdir)
throws IOException, DeserializationException {
Path versionFile = new Path(rootdir, HConstants.VERSION_FILE_NAME);
FileStatus[] status = null;
try {
// hadoop 2.0 throws FNFE if directory does not exist.
// hadoop 1.0 returns null if directory does not exist.
status = fs.listStatus(versionFile);
} catch (FileNotFoundException fnfe) {
return null;
}
if (status == null || status.length == 0) return null;
String version = null;
byte [] content = new byte [(int)status[0].getLen()];
FSDataInputStream s = fs.open(versionFile);
try {
IOUtils.readFully(s, content, 0, content.length);
if (ProtobufUtil.isPBMagicPrefix(content)) {
version = parseVersionFrom(content);
} else {
// Presume it pre-pb format.
InputStream is = new ByteArrayInputStream(content);
DataInputStream dis = new DataInputStream(is);
try {
version = dis.readUTF();
} finally {
dis.close();
}
}
} catch (EOFException eof) {
LOG.warn("Version file was empty, odd, will try to set it.");
} finally {
s.close();
}
return version;
}
/**
* Parse the content of the ${HBASE_ROOTDIR}/hbase.version file.
* @param bytes The byte content of the hbase.version file.
* @return The version found in the file as a String.
* @throws DeserializationException
*/
static String parseVersionFrom(final byte [] bytes)
throws DeserializationException {
ProtobufUtil.expectPBMagicPrefix(bytes);
int pblen = ProtobufUtil.lengthOfPBMagic();
FSProtos.HBaseVersionFileContent.Builder builder =
FSProtos.HBaseVersionFileContent.newBuilder();
try {
ProtobufUtil.mergeFrom(builder, bytes, pblen, bytes.length - pblen);
return builder.getVersion();
} catch (IOException e) {
// Convert
throw new DeserializationException(e);
}
}
/**
* Create the content to write into the ${HBASE_ROOTDIR}/hbase.version file.
* @param version Version to persist
* @return Serialized protobuf with <code>version</code> content and a bit of pb magic for a prefix.
*/
static byte [] toVersionByteArray(final String version) {
FSProtos.HBaseVersionFileContent.Builder builder =
FSProtos.HBaseVersionFileContent.newBuilder();
return ProtobufUtil.prependPBMagic(builder.setVersion(version).build().toByteArray());
}
/**
* Verifies current version of file system
*
* @param fs file system
* @param rootdir root directory of HBase installation
* @param message if true, issues a message on System.out
*
* @throws IOException e
* @throws DeserializationException
*/
public static void checkVersion(FileSystem fs, Path rootdir, boolean message)
throws IOException, DeserializationException {
checkVersion(fs, rootdir, message, 0, HConstants.DEFAULT_VERSION_FILE_WRITE_ATTEMPTS);
}
/**
* Verifies current version of file system
*
* @param fs file system
* @param rootdir root directory of HBase installation
* @param message if true, issues a message on System.out
* @param wait wait interval
* @param retries number of times to retry
*
* @throws IOException e
* @throws DeserializationException
*/
public static void checkVersion(FileSystem fs, Path rootdir,
boolean message, int wait, int retries)
throws IOException, DeserializationException {
String version = getVersion(fs, rootdir);
if (version == null) {
if (!metaRegionExists(fs, rootdir)) {
// rootDir is empty (no version file and no root region)
// just create new version file (HBASE-1195)
setVersion(fs, rootdir, wait, retries);
return;
}
} else if (version.compareTo(HConstants.FILE_SYSTEM_VERSION) == 0) return;
// version is deprecated require migration
// Output on stdout so user sees it in terminal.
String msg = "HBase file layout needs to be upgraded."
+ " You have version " + version
+ " and I want version " + HConstants.FILE_SYSTEM_VERSION
+ ". Consult http://hbase.apache.org/book.html for further information about upgrading HBase."
+ " Is your hbase.rootdir valid? If so, you may need to run "
+ "'hbase hbck -fixVersionFile'.";
if (message) {
System.out.println("WARNING! " + msg);
}
throw new FileSystemVersionException(msg);
}
/**
* Sets version of file system
*
* @param fs filesystem object
* @param rootdir hbase root
* @throws IOException e
*/
public static void setVersion(FileSystem fs, Path rootdir)
throws IOException {
setVersion(fs, rootdir, HConstants.FILE_SYSTEM_VERSION, 0,
HConstants.DEFAULT_VERSION_FILE_WRITE_ATTEMPTS);
}
/**
* Sets version of file system
*
* @param fs filesystem object
* @param rootdir hbase root
* @param wait time to wait for retry
* @param retries number of times to retry before failing
* @throws IOException e
*/
public static void setVersion(FileSystem fs, Path rootdir, int wait, int retries)
throws IOException {
setVersion(fs, rootdir, HConstants.FILE_SYSTEM_VERSION, wait, retries);
}
/**
* Sets version of file system
*
* @param fs filesystem object
* @param rootdir hbase root directory
* @param version version to set
* @param wait time to wait for retry
* @param retries number of times to retry before throwing an IOException
* @throws IOException e
*/
public static void setVersion(FileSystem fs, Path rootdir, String version,
int wait, int retries) throws IOException {
Path versionFile = new Path(rootdir, HConstants.VERSION_FILE_NAME);
Path tempVersionFile = new Path(rootdir, HConstants.HBASE_TEMP_DIRECTORY + Path.SEPARATOR +
HConstants.VERSION_FILE_NAME);
while (true) {
try {
// Write the version to a temporary file
FSDataOutputStream s = fs.create(tempVersionFile);
try {
s.write(toVersionByteArray(version));
s.close();
s = null;
// Move the temp version file to its normal location. Returns false
// if the rename failed. Throw an IOE in that case.
if (!fs.rename(tempVersionFile, versionFile)) {
throw new IOException("Unable to move temp version file to " + versionFile);
}
} finally {
// Cleaning up the temporary if the rename failed would be trying
// too hard. We'll unconditionally create it again the next time
// through anyway, files are overwritten by default by create().
// Attempt to close the stream on the way out if it is still open.
try {
if (s != null) s.close();
} catch (IOException ignore) { }
}
LOG.info("Created version file at " + rootdir.toString() + " with version=" + version);
return;
} catch (IOException e) {
if (retries > 0) {
LOG.debug("Unable to create version file at " + rootdir.toString() + ", retrying", e);
fs.delete(versionFile, false);
try {
if (wait > 0) {
Thread.sleep(wait);
}
} catch (InterruptedException ie) {
throw (InterruptedIOException)new InterruptedIOException().initCause(ie);
}
retries--;
} else {
throw e;
}
}
}
}
/**
* Checks that a cluster ID file exists in the HBase root directory
* @param fs the root directory FileSystem
* @param rootdir the HBase root directory in HDFS
* @param wait how long to wait between retries
* @return <code>true</code> if the file exists, otherwise <code>false</code>
* @throws IOException if checking the FileSystem fails
*/
public static boolean checkClusterIdExists(FileSystem fs, Path rootdir,
int wait) throws IOException {
while (true) {
try {
Path filePath = new Path(rootdir, HConstants.CLUSTER_ID_FILE_NAME);
return fs.exists(filePath);
} catch (IOException ioe) {
if (wait > 0) {
LOG.warn("Unable to check cluster ID file in " + rootdir.toString() +
", retrying in "+wait+"msec: "+StringUtils.stringifyException(ioe));
try {
Thread.sleep(wait);
} catch (InterruptedException e) {
throw (InterruptedIOException)new InterruptedIOException().initCause(e);
}
} else {
throw ioe;
}
}
}
}
/**
* Returns the value of the unique cluster ID stored for this HBase instance.
* @param fs the root directory FileSystem
* @param rootdir the path to the HBase root directory
* @return the unique cluster identifier
* @throws IOException if reading the cluster ID file fails
*/
public static ClusterId getClusterId(FileSystem fs, Path rootdir)
throws IOException {
Path idPath = new Path(rootdir, HConstants.CLUSTER_ID_FILE_NAME);
ClusterId clusterId = null;
FileStatus status = fs.exists(idPath)? fs.getFileStatus(idPath): null;
if (status != null) {
int len = Ints.checkedCast(status.getLen());
byte [] content = new byte[len];
FSDataInputStream in = fs.open(idPath);
try {
in.readFully(content);
} catch (EOFException eof) {
LOG.warn("Cluster ID file " + idPath.toString() + " was empty");
} finally{
in.close();
}
try {
clusterId = ClusterId.parseFrom(content);
} catch (DeserializationException e) {
throw new IOException("content=" + Bytes.toString(content), e);
}
// If not pb'd, make it so.
if (!ProtobufUtil.isPBMagicPrefix(content)) {
String cid = null;
in = fs.open(idPath);
try {
cid = in.readUTF();
clusterId = new ClusterId(cid);
} catch (EOFException eof) {
LOG.warn("Cluster ID file " + idPath.toString() + " was empty");
} finally {
in.close();
}
rewriteAsPb(fs, rootdir, idPath, clusterId);
}
return clusterId;
} else {
LOG.warn("Cluster ID file does not exist at " + idPath.toString());
}
return clusterId;
}
/**
* @param cid
* @throws IOException
*/
private static void rewriteAsPb(final FileSystem fs, final Path rootdir, final Path p,
final ClusterId cid)
throws IOException {
// Rewrite the file as pb. Move aside the old one first, write new
// then delete the moved-aside file.
Path movedAsideName = new Path(p + "." + System.currentTimeMillis());
if (!fs.rename(p, movedAsideName)) throw new IOException("Failed rename of " + p);
setClusterId(fs, rootdir, cid, 100);
if (!fs.delete(movedAsideName, false)) {
throw new IOException("Failed delete of " + movedAsideName);
}
LOG.debug("Rewrote the hbase.id file as pb");
}
/**
* Writes a new unique identifier for this cluster to the "hbase.id" file
* in the HBase root directory
* @param fs the root directory FileSystem
* @param rootdir the path to the HBase root directory
* @param clusterId the unique identifier to store
* @param wait how long (in milliseconds) to wait between retries
* @throws IOException if writing to the FileSystem fails and no wait value
*/
public static void setClusterId(FileSystem fs, Path rootdir, ClusterId clusterId,
int wait) throws IOException {
while (true) {
try {
Path idFile = new Path(rootdir, HConstants.CLUSTER_ID_FILE_NAME);
Path tempIdFile = new Path(rootdir, HConstants.HBASE_TEMP_DIRECTORY +
Path.SEPARATOR + HConstants.CLUSTER_ID_FILE_NAME);
// Write the id file to a temporary location
FSDataOutputStream s = fs.create(tempIdFile);
try {
s.write(clusterId.toByteArray());
s.close();
s = null;
// Move the temporary file to its normal location. Throw an IOE if
// the rename failed
if (!fs.rename(tempIdFile, idFile)) {
throw new IOException("Unable to move temp version file to " + idFile);
}
} finally {
// Attempt to close the stream if still open on the way out
try {
if (s != null) s.close();
} catch (IOException ignore) { }
}
if (LOG.isDebugEnabled()) {
LOG.debug("Created cluster ID file at " + idFile.toString() + " with ID: " + clusterId);
}
return;
} catch (IOException ioe) {
if (wait > 0) {
LOG.warn("Unable to create cluster ID file in " + rootdir.toString() +
", retrying in " + wait + "msec: " + StringUtils.stringifyException(ioe));
try {
Thread.sleep(wait);
} catch (InterruptedException e) {
throw (InterruptedIOException)new InterruptedIOException().initCause(e);
}
} else {
throw ioe;
}
}
}
}
/**
* Verifies root directory path is a valid URI with a scheme
*
* @param root root directory path
* @return Passed <code>root</code> argument.
* @throws IOException if not a valid URI with a scheme
*/
public static Path validateRootPath(Path root) throws IOException {
try {
URI rootURI = new URI(root.toString());
String scheme = rootURI.getScheme();
if (scheme == null) {
throw new IOException("Root directory does not have a scheme");
}
return root;
} catch (URISyntaxException e) {
IOException io = new IOException("Root directory path is not a valid " +
"URI -- check your " + HBASE_DIR + " configuration");
io.initCause(e);
throw io;
}
}
/**
* Checks for the presence of the WAL log root path (using the provided conf object) in the given path. If
* it exists, this method removes it and returns the String representation of remaining relative path.
* @param path
* @param conf
* @return String representation of the remaining relative path
* @throws IOException
*/
public static String removeWALRootPath(Path path, final Configuration conf) throws IOException {
Path root = getWALRootDir(conf);
String pathStr = path.toString();
// check that the path is absolute... it has the root path in it.
if (!pathStr.startsWith(root.toString())) return pathStr;
// if not, return as it is.
return pathStr.substring(root.toString().length() + 1);// remove the "/" too.
}
/**
* If DFS, check safe mode and if so, wait until we clear it.
* @param conf configuration
* @param wait Sleep between retries
* @throws IOException e
*/
public static void waitOnSafeMode(final Configuration conf,
final long wait)
throws IOException {
FileSystem fs = FileSystem.get(conf);
if (!(fs instanceof DistributedFileSystem)) return;
DistributedFileSystem dfs = (DistributedFileSystem)fs;
// Make sure dfs is not in safe mode
while (isInSafeMode(dfs)) {
LOG.info("Waiting for dfs to exit safe mode...");
try {
Thread.sleep(wait);
} catch (InterruptedException e) {
throw (InterruptedIOException)new InterruptedIOException().initCause(e);
}
}
}
/**
* Return the 'path' component of a Path. In Hadoop, Path is an URI. This
* method returns the 'path' component of a Path's URI: e.g. If a Path is
* <code>hdfs://example.org:9000/hbase_trunk/TestTable/compaction.dir</code>,
* this method returns <code>/hbase_trunk/TestTable/compaction.dir</code>.
* This method is useful if you want to print out a Path without qualifying
* Filesystem instance.
* @param p Filesystem Path whose 'path' component we are to return.
* @return Path portion of the Filesystem
*/
public static String getPath(Path p) {
return p.toUri().getPath();
}
/**
* @param c configuration
* @return {@link Path} to hbase root directory: i.e. {@value org.apache.hadoop.hbase.HConstants#HBASE_DIR} from
* configuration as a qualified Path.
* @throws IOException e
*/
public static Path getRootDir(final Configuration c) throws IOException {
Path p = new Path(c.get(HBASE_DIR));
FileSystem fs = p.getFileSystem(c);
return p.makeQualified(fs);
}
public static void setRootDir(final Configuration c, final Path root) throws IOException {
c.set(HBASE_DIR, root.toString());
}
public static void setFsDefault(final Configuration c, final Path root) throws IOException {
c.set("fs.defaultFS", root.toString()); // for hadoop 0.21+
}
public static FileSystem getRootDirFileSystem(final Configuration c) throws IOException {
Path p = getRootDir(c);
return p.getFileSystem(c);
}
/**
* @param c configuration
* @return {@link Path} to hbase log root directory: i.e. {@value org.apache.hadoop.hbase.fs.HFileSystem#HBASE_WAL_DIR} from
* configuration as a qualified Path. Defaults to {@value org.apache.hadoop.hbase.HConstants#HBASE_DIR}
* @throws IOException e
*/
public static Path getWALRootDir(final Configuration c) throws IOException {
Path p = new Path(c.get(HFileSystem.HBASE_WAL_DIR, c.get(HBASE_DIR)));
if (!isValidWALRootDir(p, c)) {
return FSUtils.getRootDir(c);
}
FileSystem fs = p.getFileSystem(c);
return p.makeQualified(fs);
}
@VisibleForTesting
public static void setWALRootDir(final Configuration c, final Path root) throws IOException {
c.set(HFileSystem.HBASE_WAL_DIR, root.toString());
}
public static FileSystem getWALFileSystem(final Configuration c) throws IOException {
Path p = getWALRootDir(c);
return p.getFileSystem(c);
}
private static boolean isValidWALRootDir(Path walDir, final Configuration c) throws IOException {
Path rootDir = FSUtils.getRootDir(c);
if (walDir != rootDir) {
if (walDir.toString().startsWith(rootDir.toString() + "/")) {
throw new IllegalStateException("Illegal WAL directory specified. " +
"WAL directories are not permitted to be under the root directory if set.");
}
}
return true;
}
/**
* Checks if meta region exists
*
* @param fs file system
* @param rootdir root directory of HBase installation
* @return true if exists
* @throws IOException e
*/
@SuppressWarnings("deprecation")
public static boolean metaRegionExists(FileSystem fs, Path rootdir)
throws IOException {
Path metaRegionDir =
HRegion.getRegionDir(rootdir, HRegionInfo.FIRST_META_REGIONINFO);
return fs.exists(metaRegionDir);
}
/**
* Compute HDFS blocks distribution of a given file, or a portion of the file
* @param fs file system
* @param status file status of the file
* @param start start position of the portion
* @param length length of the portion
* @return The HDFS blocks distribution
*/
static public HDFSBlocksDistribution computeHDFSBlocksDistribution(
final FileSystem fs, FileStatus status, long start, long length)
throws IOException {
HDFSBlocksDistribution blocksDistribution = new HDFSBlocksDistribution();
BlockLocation [] blockLocations =
fs.getFileBlockLocations(status, start, length);
for(BlockLocation bl : blockLocations) {
String [] hosts = bl.getHosts();
long len = bl.getLength();
blocksDistribution.addHostsAndBlockWeight(hosts, len);
}
return blocksDistribution;
}
/**
* Update blocksDistribution with blockLocations
* @param blocksDistribution the hdfs blocks distribution
* @param blockLocations an array containing block location
*/
static public void addToHDFSBlocksDistribution(
HDFSBlocksDistribution blocksDistribution, BlockLocation[] blockLocations)
throws IOException {
for (BlockLocation bl : blockLocations) {
String[] hosts = bl.getHosts();
long len = bl.getLength();
blocksDistribution.addHostsAndBlockWeight(hosts, len);
}
}
// TODO move this method OUT of FSUtils. No dependencies to HMaster
/**
* Returns the total overall fragmentation percentage. Includes hbase:meta and
* -ROOT- as well.
*
* @param master The master defining the HBase root and file system.
* @return A map for each table and its percentage.
* @throws IOException When scanning the directory fails.
*/
public static int getTotalTableFragmentation(final HMaster master)
throws IOException {
Map<String, Integer> map = getTableFragmentation(master);
return map != null && map.size() > 0 ? map.get("-TOTAL-") : -1;
}
/**
* Runs through the HBase rootdir and checks how many stores for each table
* have more than one file in them. Checks -ROOT- and hbase:meta too. The total
* percentage across all tables is stored under the special key "-TOTAL-".
*
* @param master The master defining the HBase root and file system.
* @return A map for each table and its percentage.
*
* @throws IOException When scanning the directory fails.
*/
public static Map<String, Integer> getTableFragmentation(
final HMaster master)
throws IOException {
Path path = getRootDir(master.getConfiguration());
// since HMaster.getFileSystem() is package private
FileSystem fs = path.getFileSystem(master.getConfiguration());
return getTableFragmentation(fs, path);
}
/**
* Runs through the HBase rootdir and checks how many stores for each table
* have more than one file in them. Checks -ROOT- and hbase:meta too. The total
* percentage across all tables is stored under the special key "-TOTAL-".
*
* @param fs The file system to use.
* @param hbaseRootDir The root directory to scan.
* @return A map for each table and its percentage.
* @throws IOException When scanning the directory fails.
*/
public static Map<String, Integer> getTableFragmentation(
final FileSystem fs, final Path hbaseRootDir)
throws IOException {
Map<String, Integer> frags = new HashMap<>();
int cfCountTotal = 0;
int cfFragTotal = 0;
PathFilter regionFilter = new RegionDirFilter(fs);
PathFilter familyFilter = new FamilyDirFilter(fs);
List<Path> tableDirs = getTableDirs(fs, hbaseRootDir);
for (Path d : tableDirs) {
int cfCount = 0;
int cfFrag = 0;
FileStatus[] regionDirs = fs.listStatus(d, regionFilter);
for (FileStatus regionDir : regionDirs) {
Path dd = regionDir.getPath();
// else its a region name, now look in region for families
FileStatus[] familyDirs = fs.listStatus(dd, familyFilter);
for (FileStatus familyDir : familyDirs) {
cfCount++;
cfCountTotal++;
Path family = familyDir.getPath();
// now in family make sure only one file
FileStatus[] familyStatus = fs.listStatus(family);
if (familyStatus.length > 1) {
cfFrag++;
cfFragTotal++;
}
}
}
// compute percentage per table and store in result list
frags.put(FSUtils.getTableName(d).getNameAsString(),
cfCount == 0? 0: Math.round((float) cfFrag / cfCount * 100));
}
// set overall percentage for all tables
frags.put("-TOTAL-",
cfCountTotal == 0? 0: Math.round((float) cfFragTotal / cfCountTotal * 100));
return frags;
}
/**
* Returns the {@link org.apache.hadoop.fs.Path} object representing the table directory under
* path rootdir
*
* @param rootdir qualified path of HBase root directory
* @param tableName name of table
* @return {@link org.apache.hadoop.fs.Path} for table
*/
public static Path getTableDir(Path rootdir, final TableName tableName) {
return new Path(getNamespaceDir(rootdir, tableName.getNamespaceAsString()),
tableName.getQualifierAsString());
}
/**
* Returns the {@link org.apache.hadoop.hbase.TableName} object representing
* the table directory under
* path rootdir
*
* @param tablePath path of table
* @return {@link org.apache.hadoop.fs.Path} for table
*/
public static TableName getTableName(Path tablePath) {
return TableName.valueOf(tablePath.getParent().getName(), tablePath.getName());
}
/**
* Returns the {@link org.apache.hadoop.fs.Path} object representing
* the namespace directory under path rootdir
*
* @param rootdir qualified path of HBase root directory
* @param namespace namespace name
* @return {@link org.apache.hadoop.fs.Path} for table
*/
public static Path getNamespaceDir(Path rootdir, final String namespace) {
return new Path(rootdir, new Path(HConstants.BASE_NAMESPACE_DIR,
new Path(namespace)));
}
/**
* A {@link PathFilter} that returns only regular files.
*/
static class FileFilter extends AbstractFileStatusFilter {
private final FileSystem fs;
public FileFilter(final FileSystem fs) {
this.fs = fs;
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
try {
return isFile(fs, isDir, p);
} catch (IOException e) {
LOG.warn("unable to verify if path=" + p + " is a regular file", e);
return false;
}
}
}
/**
* Directory filter that doesn't include any of the directories in the specified blacklist
*/
public static class BlackListDirFilter extends AbstractFileStatusFilter {
private final FileSystem fs;
private List<String> blacklist;
/**
* Create a filter on the givem filesystem with the specified blacklist
* @param fs filesystem to filter
* @param directoryNameBlackList list of the names of the directories to filter. If
* <tt>null</tt>, all directories are returned
*/
@SuppressWarnings("unchecked")
public BlackListDirFilter(final FileSystem fs, final List<String> directoryNameBlackList) {
this.fs = fs;
blacklist =
(List<String>) (directoryNameBlackList == null ? Collections.emptyList()
: directoryNameBlackList);
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
if (!isValidName(p.getName())) {
return false;
}
try {
return isDirectory(fs, isDir, p);
} catch (IOException e) {
LOG.warn("An error occurred while verifying if [" + p.toString()
+ "] is a valid directory. Returning 'not valid' and continuing.", e);
return false;
}
}
protected boolean isValidName(final String name) {
return !blacklist.contains(name);
}
}
/**
* A {@link PathFilter} that only allows directories.
*/
public static class DirFilter extends BlackListDirFilter {
public DirFilter(FileSystem fs) {
super(fs, null);
}
}
/**
* A {@link PathFilter} that returns usertable directories. To get all directories use the
* {@link BlackListDirFilter} with a <tt>null</tt> blacklist
*/
public static class UserTableDirFilter extends BlackListDirFilter {
public UserTableDirFilter(FileSystem fs) {
super(fs, HConstants.HBASE_NON_TABLE_DIRS);
}
@Override
protected boolean isValidName(final String name) {
if (!super.isValidName(name))
return false;
try {
TableName.isLegalTableQualifierName(Bytes.toBytes(name));
} catch (IllegalArgumentException e) {
LOG.info("INVALID NAME " + name);
return false;
}
return true;
}
}
/**
* @param conf
* @return True if this filesystem whose scheme is 'hdfs'.
* @throws IOException
*/
public static boolean isHDFS(final Configuration conf) throws IOException {
FileSystem fs = FileSystem.get(conf);
String scheme = fs.getUri().getScheme();
return scheme.equalsIgnoreCase("hdfs");
}
/**
* Recover file lease. Used when a file might be suspect
* to be had been left open by another process.
* @param fs FileSystem handle
* @param p Path of file to recover lease
* @param conf Configuration handle
* @throws IOException
*/
public abstract void recoverFileLease(final FileSystem fs, final Path p,
Configuration conf, CancelableProgressable reporter) throws IOException;
public static List<Path> getTableDirs(final FileSystem fs, final Path rootdir)
throws IOException {
List<Path> tableDirs = new LinkedList<>();
for(FileStatus status :
fs.globStatus(new Path(rootdir,
new Path(HConstants.BASE_NAMESPACE_DIR, "*")))) {
tableDirs.addAll(FSUtils.getLocalTableDirs(fs, status.getPath()));
}
return tableDirs;
}
/**
* @param fs
* @param rootdir
* @return All the table directories under <code>rootdir</code>. Ignore non table hbase folders such as
* .logs, .oldlogs, .corrupt folders.
* @throws IOException
*/
public static List<Path> getLocalTableDirs(final FileSystem fs, final Path rootdir)
throws IOException {
// presumes any directory under hbase.rootdir is a table
FileStatus[] dirs = fs.listStatus(rootdir, new UserTableDirFilter(fs));
List<Path> tabledirs = new ArrayList<>(dirs.length);
for (FileStatus dir: dirs) {
tabledirs.add(dir.getPath());
}
return tabledirs;
}
/**
* Checks if the given path is the one with 'recovered.edits' dir.
* @param path
* @return True if we recovered edits
*/
public static boolean isRecoveredEdits(Path path) {
return path.toString().contains(HConstants.RECOVERED_EDITS_DIR);
}
/**
* Filter for all dirs that don't start with '.'
*/
public static class RegionDirFilter extends AbstractFileStatusFilter {
// This pattern will accept 0.90+ style hex region dirs and older numeric region dir names.
final public static Pattern regionDirPattern = Pattern.compile("^[0-9a-f]*$");
final FileSystem fs;
public RegionDirFilter(FileSystem fs) {
this.fs = fs;
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
if (!regionDirPattern.matcher(p.getName()).matches()) {
return false;
}
try {
return isDirectory(fs, isDir, p);
} catch (IOException ioe) {
// Maybe the file was moved or the fs was disconnected.
LOG.warn("Skipping file " + p +" due to IOException", ioe);
return false;
}
}
}
/**
* Given a particular table dir, return all the regiondirs inside it, excluding files such as
* .tableinfo
* @param fs A file system for the Path
* @param tableDir Path to a specific table directory <hbase.rootdir>/<tabledir>
* @return List of paths to valid region directories in table dir.
* @throws IOException
*/
public static List<Path> getRegionDirs(final FileSystem fs, final Path tableDir) throws IOException {
// assumes we are in a table dir.
List<FileStatus> rds = listStatusWithStatusFilter(fs, tableDir, new RegionDirFilter(fs));
if (rds == null) {
return new ArrayList<>();
}
List<Path> regionDirs = new ArrayList<>(rds.size());
for (FileStatus rdfs: rds) {
Path rdPath = rdfs.getPath();
regionDirs.add(rdPath);
}
return regionDirs;
}
/**
* Filter for all dirs that are legal column family names. This is generally used for colfam
* dirs <hbase.rootdir>/<tabledir>/<regiondir>/<colfamdir>.
*/
public static class FamilyDirFilter extends AbstractFileStatusFilter {
final FileSystem fs;
public FamilyDirFilter(FileSystem fs) {
this.fs = fs;
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
try {
// throws IAE if invalid
HColumnDescriptor.isLegalFamilyName(Bytes.toBytes(p.getName()));
} catch (IllegalArgumentException iae) {
// path name is an invalid family name and thus is excluded.
return false;
}
try {
return isDirectory(fs, isDir, p);
} catch (IOException ioe) {
// Maybe the file was moved or the fs was disconnected.
LOG.warn("Skipping file " + p +" due to IOException", ioe);
return false;
}
}
}
/**
* Given a particular region dir, return all the familydirs inside it
*
* @param fs A file system for the Path
* @param regionDir Path to a specific region directory
* @return List of paths to valid family directories in region dir.
* @throws IOException
*/
public static List<Path> getFamilyDirs(final FileSystem fs, final Path regionDir) throws IOException {
// assumes we are in a region dir.
FileStatus[] fds = fs.listStatus(regionDir, new FamilyDirFilter(fs));
List<Path> familyDirs = new ArrayList<>(fds.length);
for (FileStatus fdfs: fds) {
Path fdPath = fdfs.getPath();
familyDirs.add(fdPath);
}
return familyDirs;
}
public static List<Path> getReferenceFilePaths(final FileSystem fs, final Path familyDir) throws IOException {
List<FileStatus> fds = listStatusWithStatusFilter(fs, familyDir, new ReferenceFileFilter(fs));
if (fds == null) {
return new ArrayList<>();
}
List<Path> referenceFiles = new ArrayList<>(fds.size());
for (FileStatus fdfs: fds) {
Path fdPath = fdfs.getPath();
referenceFiles.add(fdPath);
}
return referenceFiles;
}
/**
* Filter for HFiles that excludes reference files.
*/
public static class HFileFilter extends AbstractFileStatusFilter {
final FileSystem fs;
public HFileFilter(FileSystem fs) {
this.fs = fs;
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
if (!StoreFileInfo.isHFile(p)) {
return false;
}
try {
return isFile(fs, isDir, p);
} catch (IOException ioe) {
// Maybe the file was moved or the fs was disconnected.
LOG.warn("Skipping file " + p +" due to IOException", ioe);
return false;
}
}
}
/**
* Filter for HFileLinks (StoreFiles and HFiles not included).
* the filter itself does not consider if a link is file or not.
*/
public static class HFileLinkFilter implements PathFilter {
@Override
public boolean accept(Path p) {
return HFileLink.isHFileLink(p);
}
}
public static class ReferenceFileFilter extends AbstractFileStatusFilter {
private final FileSystem fs;
public ReferenceFileFilter(FileSystem fs) {
this.fs = fs;
}
@Override
protected boolean accept(Path p, @CheckForNull Boolean isDir) {
if (!StoreFileInfo.isReference(p)) {
return false;
}
try {
// only files can be references.
return isFile(fs, isDir, p);
} catch (IOException ioe) {
// Maybe the file was moved or the fs was disconnected.
LOG.warn("Skipping file " + p +" due to IOException", ioe);
return false;
}
}
}
/**
* @param conf
* @return Returns the filesystem of the hbase rootdir.
* @throws IOException
*/
public static FileSystem getCurrentFileSystem(Configuration conf)
throws IOException {
return getRootDir(conf).getFileSystem(conf);
}
/**
* Runs through the HBase rootdir/tablename and creates a reverse lookup map for
* table StoreFile names to the full Path.
* <br>
* Example...<br>
* Key = 3944417774205889744 <br>
* Value = hdfs://localhost:51169/user/userid/-ROOT-/70236052/info/3944417774205889744
*
* @param map map to add values. If null, this method will create and populate one to return
* @param fs The file system to use.
* @param hbaseRootDir The root directory to scan.
* @param tableName name of the table to scan.
* @return Map keyed by StoreFile name with a value of the full Path.
* @throws IOException When scanning the directory fails.
* @throws InterruptedException
*/
public static Map<String, Path> getTableStoreFilePathMap(Map<String, Path> map,
final FileSystem fs, final Path hbaseRootDir, TableName tableName)
throws IOException, InterruptedException {
return getTableStoreFilePathMap(map, fs, hbaseRootDir, tableName, null, null, null);
}
/**
* Runs through the HBase rootdir/tablename and creates a reverse lookup map for
* table StoreFile names to the full Path. Note that because this method can be called
* on a 'live' HBase system that we will skip files that no longer exist by the time
* we traverse them and similarly the user of the result needs to consider that some
* entries in this map may not exist by the time this call completes.
* <br>
* Example...<br>
* Key = 3944417774205889744 <br>
* Value = hdfs://localhost:51169/user/userid/-ROOT-/70236052/info/3944417774205889744
*
* @param resultMap map to add values. If null, this method will create and populate one to return
* @param fs The file system to use.
* @param hbaseRootDir The root directory to scan.
* @param tableName name of the table to scan.
* @param sfFilter optional path filter to apply to store files
* @param executor optional executor service to parallelize this operation
* @param errors ErrorReporter instance or null
* @return Map keyed by StoreFile name with a value of the full Path.
* @throws IOException When scanning the directory fails.
* @throws InterruptedException
*/
public static Map<String, Path> getTableStoreFilePathMap(
Map<String, Path> resultMap,
final FileSystem fs, final Path hbaseRootDir, TableName tableName, final PathFilter sfFilter,
ExecutorService executor, final ErrorReporter errors) throws IOException, InterruptedException {
final Map<String, Path> finalResultMap =
resultMap == null ? new ConcurrentHashMap<>(128, 0.75f, 32) : resultMap;
// only include the directory paths to tables
Path tableDir = FSUtils.getTableDir(hbaseRootDir, tableName);
// Inside a table, there are compaction.dir directories to skip. Otherwise, all else
// should be regions.
final FamilyDirFilter familyFilter = new FamilyDirFilter(fs);
final Vector<Exception> exceptions = new Vector<>();
try {
List<FileStatus> regionDirs = FSUtils.listStatusWithStatusFilter(fs, tableDir, new RegionDirFilter(fs));
if (regionDirs == null) {
return finalResultMap;
}
final List<Future<?>> futures = new ArrayList<>(regionDirs.size());
for (FileStatus regionDir : regionDirs) {
if (null != errors) {
errors.progress();
}
final Path dd = regionDir.getPath();
if (!exceptions.isEmpty()) {
break;
}
Runnable getRegionStoreFileMapCall = new Runnable() {
@Override
public void run() {
try {
HashMap<String,Path> regionStoreFileMap = new HashMap<>();
List<FileStatus> familyDirs = FSUtils.listStatusWithStatusFilter(fs, dd, familyFilter);
if (familyDirs == null) {
if (!fs.exists(dd)) {
LOG.warn("Skipping region because it no longer exists: " + dd);
} else {
LOG.warn("Skipping region because it has no family dirs: " + dd);
}
return;
}
for (FileStatus familyDir : familyDirs) {
if (null != errors) {
errors.progress();
}
Path family = familyDir.getPath();
if (family.getName().equals(HConstants.RECOVERED_EDITS_DIR)) {
continue;
}
// now in family, iterate over the StoreFiles and
// put in map
FileStatus[] familyStatus = fs.listStatus(family);
for (FileStatus sfStatus : familyStatus) {
if (null != errors) {
errors.progress();
}
Path sf = sfStatus.getPath();
if (sfFilter == null || sfFilter.accept(sf)) {
regionStoreFileMap.put( sf.getName(), sf);
}
}
}
finalResultMap.putAll(regionStoreFileMap);
} catch (Exception e) {
LOG.error("Could not get region store file map for region: " + dd, e);
exceptions.add(e);
}
}
};
// If executor is available, submit async tasks to exec concurrently, otherwise
// just do serial sync execution
if (executor != null) {
Future<?> future = executor.submit(getRegionStoreFileMapCall);
futures.add(future);
} else {
FutureTask<?> future = new FutureTask<>(getRegionStoreFileMapCall, null);
future.run();
futures.add(future);
}
}
// Ensure all pending tasks are complete (or that we run into an exception)
for (Future<?> f : futures) {
if (!exceptions.isEmpty()) {
break;
}
try {
f.get();
} catch (ExecutionException e) {
LOG.error("Unexpected exec exception! Should've been caught already. (Bug?)", e);
// Shouldn't happen, we already logged/caught any exceptions in the Runnable
}
}
} catch (IOException e) {
LOG.error("Cannot execute getTableStoreFilePathMap for " + tableName, e);
exceptions.add(e);
} finally {
if (!exceptions.isEmpty()) {
// Just throw the first exception as an indication something bad happened
// Don't need to propagate all the exceptions, we already logged them all anyway
Throwables.propagateIfInstanceOf(exceptions.firstElement(), IOException.class);
throw Throwables.propagate(exceptions.firstElement());
}
}
return finalResultMap;
}
public static int getRegionReferenceFileCount(final FileSystem fs, final Path p) {
int result = 0;
try {
for (Path familyDir:getFamilyDirs(fs, p)){
result += getReferenceFilePaths(fs, familyDir).size();
}
} catch (IOException e) {
LOG.warn("Error Counting reference files.", e);
}
return result;
}
/**
* Runs through the HBase rootdir and creates a reverse lookup map for
* table StoreFile names to the full Path.
* <br>
* Example...<br>
* Key = 3944417774205889744 <br>
* Value = hdfs://localhost:51169/user/userid/-ROOT-/70236052/info/3944417774205889744
*
* @param fs The file system to use.
* @param hbaseRootDir The root directory to scan.
* @return Map keyed by StoreFile name with a value of the full Path.
* @throws IOException When scanning the directory fails.
* @throws InterruptedException
*/
public static Map<String, Path> getTableStoreFilePathMap(
final FileSystem fs, final Path hbaseRootDir)
throws IOException, InterruptedException {
return getTableStoreFilePathMap(fs, hbaseRootDir, null, null, null);
}
/**
* Runs through the HBase rootdir and creates a reverse lookup map for
* table StoreFile names to the full Path.
* <br>
* Example...<br>
* Key = 3944417774205889744 <br>
* Value = hdfs://localhost:51169/user/userid/-ROOT-/70236052/info/3944417774205889744
*
* @param fs The file system to use.
* @param hbaseRootDir The root directory to scan.
* @param sfFilter optional path filter to apply to store files
* @param executor optional executor service to parallelize this operation
* @param errors ErrorReporter instance or null
* @return Map keyed by StoreFile name with a value of the full Path.
* @throws IOException When scanning the directory fails.
* @throws InterruptedException
*/
public static Map<String, Path> getTableStoreFilePathMap(
final FileSystem fs, final Path hbaseRootDir, PathFilter sfFilter,
ExecutorService executor, ErrorReporter errors)
throws IOException, InterruptedException {
ConcurrentHashMap<String, Path> map = new ConcurrentHashMap<>(1024, 0.75f, 32);
// if this method looks similar to 'getTableFragmentation' that is because
// it was borrowed from it.
// only include the directory paths to tables
for (Path tableDir : FSUtils.getTableDirs(fs, hbaseRootDir)) {
getTableStoreFilePathMap(map, fs, hbaseRootDir,
FSUtils.getTableName(tableDir), sfFilter, executor, errors);
}
return map;
}
/**
* Filters FileStatuses in an array and returns a list
*
* @param input An array of FileStatuses
* @param filter A required filter to filter the array
* @return A list of FileStatuses
*/
public static List<FileStatus> filterFileStatuses(FileStatus[] input,
FileStatusFilter filter) {
if (input == null) return null;
return filterFileStatuses(Iterators.forArray(input), filter);
}
/**
* Filters FileStatuses in an iterator and returns a list
*
* @param input An iterator of FileStatuses
* @param filter A required filter to filter the array
* @return A list of FileStatuses
*/
public static List<FileStatus> filterFileStatuses(Iterator<FileStatus> input,
FileStatusFilter filter) {
if (input == null) return null;
ArrayList<FileStatus> results = new ArrayList<>();
while (input.hasNext()) {
FileStatus f = input.next();
if (filter.accept(f)) {
results.add(f);
}
}
return results;
}
/**
* Calls fs.listStatus() and treats FileNotFoundException as non-fatal
* This accommodates differences between hadoop versions, where hadoop 1
* does not throw a FileNotFoundException, and return an empty FileStatus[]
* while Hadoop 2 will throw FileNotFoundException.
*
* @param fs file system
* @param dir directory
* @param filter file status filter
* @return null if dir is empty or doesn't exist, otherwise FileStatus list
*/
public static List<FileStatus> listStatusWithStatusFilter(final FileSystem fs,
final Path dir, final FileStatusFilter filter) throws IOException {
FileStatus [] status = null;
try {
status = fs.listStatus(dir);
} catch (FileNotFoundException fnfe) {
// if directory doesn't exist, return null
if (LOG.isTraceEnabled()) {
LOG.trace(dir + " doesn't exist");
}
}
if (status == null || status.length < 1) {
return null;
}
if (filter == null) {
return Arrays.asList(status);
} else {
List<FileStatus> status2 = filterFileStatuses(status, filter);
if (status2 == null || status2.isEmpty()) {
return null;
} else {
return status2;
}
}
}
/**
* Calls fs.listStatus() and treats FileNotFoundException as non-fatal
* This accommodates differences between hadoop versions, where hadoop 1
* does not throw a FileNotFoundException, and return an empty FileStatus[]
* while Hadoop 2 will throw FileNotFoundException.
*
* Where possible, prefer {@link #listStatusWithStatusFilter(FileSystem,
* Path, FileStatusFilter)} instead.
*
* @param fs file system
* @param dir directory
* @param filter path filter
* @return null if dir is empty or doesn't exist, otherwise FileStatus array
*/
public static FileStatus [] listStatus(final FileSystem fs,
final Path dir, final PathFilter filter) throws IOException {
FileStatus [] status = null;
try {
status = filter == null ? fs.listStatus(dir) : fs.listStatus(dir, filter);
} catch (FileNotFoundException fnfe) {
// if directory doesn't exist, return null
if (LOG.isTraceEnabled()) {
LOG.trace(dir + " doesn't exist");
}
}
if (status == null || status.length < 1) return null;
return status;
}
/**
* Calls fs.listStatus() and treats FileNotFoundException as non-fatal
* This would accommodates differences between hadoop versions
*
* @param fs file system
* @param dir directory
* @return null if dir is empty or doesn't exist, otherwise FileStatus array
*/
public static FileStatus[] listStatus(final FileSystem fs, final Path dir) throws IOException {
return listStatus(fs, dir, null);
}
/**
* Calls fs.listFiles() to get FileStatus and BlockLocations together for reducing rpc call
*
* @param fs file system
* @param dir directory
* @return LocatedFileStatus list
*/
public static List<LocatedFileStatus> listLocatedStatus(final FileSystem fs,
final Path dir) throws IOException {
List<LocatedFileStatus> status = null;
try {
RemoteIterator<LocatedFileStatus> locatedFileStatusRemoteIterator = fs
.listFiles(dir, false);
while (locatedFileStatusRemoteIterator.hasNext()) {
if (status == null) {
status = Lists.newArrayList();
}
status.add(locatedFileStatusRemoteIterator.next());
}
} catch (FileNotFoundException fnfe) {
// if directory doesn't exist, return null
if (LOG.isTraceEnabled()) {
LOG.trace(dir + " doesn't exist");
}
}
return status;
}
/**
* Calls fs.delete() and returns the value returned by the fs.delete()
*
* @param fs
* @param path
* @param recursive
* @return the value returned by the fs.delete()
* @throws IOException
*/
public static boolean delete(final FileSystem fs, final Path path, final boolean recursive)
throws IOException {
return fs.delete(path, recursive);
}
/**
* Calls fs.exists(). Checks if the specified path exists
*
* @param fs
* @param path
* @return the value returned by fs.exists()
* @throws IOException
*/
public static boolean isExists(final FileSystem fs, final Path path) throws IOException {
return fs.exists(path);
}
/**
* Throw an exception if an action is not permitted by a user on a file.
*
* @param ugi
* the user
* @param file
* the file
* @param action
* the action
*/
public static void checkAccess(UserGroupInformation ugi, FileStatus file,
FsAction action) throws AccessDeniedException {
if (ugi.getShortUserName().equals(file.getOwner())) {
if (file.getPermission().getUserAction().implies(action)) {
return;
}
} else if (contains(ugi.getGroupNames(), file.getGroup())) {
if (file.getPermission().getGroupAction().implies(action)) {
return;
}
} else if (file.getPermission().getOtherAction().implies(action)) {
return;
}
throw new AccessDeniedException("Permission denied:" + " action=" + action
+ " path=" + file.getPath() + " user=" + ugi.getShortUserName());
}
private static boolean contains(String[] groups, String user) {
for (String group : groups) {
if (group.equals(user)) {
return true;
}
}
return false;
}
/**
* Log the current state of the filesystem from a certain root directory
* @param fs filesystem to investigate
* @param root root file/directory to start logging from
* @param LOG log to output information
* @throws IOException if an unexpected exception occurs
*/
public static void logFileSystemState(final FileSystem fs, final Path root, Log LOG)
throws IOException {
LOG.debug("Current file system:");
logFSTree(LOG, fs, root, "|-");
}
/**
* Recursive helper to log the state of the FS
*
* @see #logFileSystemState(FileSystem, Path, Log)
*/
private static void logFSTree(Log LOG, final FileSystem fs, final Path root, String prefix)
throws IOException {
FileStatus[] files = FSUtils.listStatus(fs, root, null);
if (files == null) return;
for (FileStatus file : files) {
if (file.isDirectory()) {
LOG.debug(prefix + file.getPath().getName() + "/");
logFSTree(LOG, fs, file.getPath(), prefix + "---");
} else {
LOG.debug(prefix + file.getPath().getName());
}
}
}
public static boolean renameAndSetModifyTime(final FileSystem fs, final Path src, final Path dest)
throws IOException {
// set the modify time for TimeToLive Cleaner
fs.setTimes(src, EnvironmentEdgeManager.currentTime(), -1);
return fs.rename(src, dest);
}
/**
* This function is to scan the root path of the file system to get the
* degree of locality for each region on each of the servers having at least
* one block of that region.
* This is used by the tool {@link org.apache.hadoop.hbase.master.RegionPlacementMaintainer}
*
* @param conf
* the configuration to use
* @return the mapping from region encoded name to a map of server names to
* locality fraction
* @throws IOException
* in case of file system errors or interrupts
*/
public static Map<String, Map<String, Float>> getRegionDegreeLocalityMappingFromFS(
final Configuration conf) throws IOException {
return getRegionDegreeLocalityMappingFromFS(
conf, null,
conf.getInt(THREAD_POOLSIZE, DEFAULT_THREAD_POOLSIZE));
}
/**
* This function is to scan the root path of the file system to get the
* degree of locality for each region on each of the servers having at least
* one block of that region.
*
* @param conf
* the configuration to use
* @param desiredTable
* the table you wish to scan locality for
* @param threadPoolSize
* the thread pool size to use
* @return the mapping from region encoded name to a map of server names to
* locality fraction
* @throws IOException
* in case of file system errors or interrupts
*/
public static Map<String, Map<String, Float>> getRegionDegreeLocalityMappingFromFS(
final Configuration conf, final String desiredTable, int threadPoolSize)
throws IOException {
Map<String, Map<String, Float>> regionDegreeLocalityMapping = new ConcurrentHashMap<>();
getRegionLocalityMappingFromFS(conf, desiredTable, threadPoolSize, null,
regionDegreeLocalityMapping);
return regionDegreeLocalityMapping;
}
/**
* This function is to scan the root path of the file system to get either the
* mapping between the region name and its best locality region server or the
* degree of locality of each region on each of the servers having at least
* one block of that region. The output map parameters are both optional.
*
* @param conf
* the configuration to use
* @param desiredTable
* the table you wish to scan locality for
* @param threadPoolSize
* the thread pool size to use
* @param regionToBestLocalityRSMapping
* the map into which to put the best locality mapping or null
* @param regionDegreeLocalityMapping
* the map into which to put the locality degree mapping or null,
* must be a thread-safe implementation
* @throws IOException
* in case of file system errors or interrupts
*/
private static void getRegionLocalityMappingFromFS(
final Configuration conf, final String desiredTable,
int threadPoolSize,
Map<String, String> regionToBestLocalityRSMapping,
Map<String, Map<String, Float>> regionDegreeLocalityMapping)
throws IOException {
FileSystem fs = FileSystem.get(conf);
Path rootPath = FSUtils.getRootDir(conf);
long startTime = EnvironmentEdgeManager.currentTime();
Path queryPath;
// The table files are in ${hbase.rootdir}/data/<namespace>/<table>/*
if (null == desiredTable) {
queryPath = new Path(new Path(rootPath, HConstants.BASE_NAMESPACE_DIR).toString() + "/*/*/*/");
} else {
queryPath = new Path(FSUtils.getTableDir(rootPath, TableName.valueOf(desiredTable)).toString() + "/*/");
}
// reject all paths that are not appropriate
PathFilter pathFilter = new PathFilter() {
@Override
public boolean accept(Path path) {
// this is the region name; it may get some noise data
if (null == path) {
return false;
}
// no parent?
Path parent = path.getParent();
if (null == parent) {
return false;
}
String regionName = path.getName();
if (null == regionName) {
return false;
}
if (!regionName.toLowerCase(Locale.ROOT).matches("[0-9a-f]+")) {
return false;
}
return true;
}
};
FileStatus[] statusList = fs.globStatus(queryPath, pathFilter);
if (null == statusList) {
return;
} else {
LOG.debug("Query Path: " + queryPath + " ; # list of files: " +
statusList.length);
}
// lower the number of threads in case we have very few expected regions
threadPoolSize = Math.min(threadPoolSize, statusList.length);
// run in multiple threads
ThreadPoolExecutor tpe = new ThreadPoolExecutor(threadPoolSize,
threadPoolSize, 60, TimeUnit.SECONDS,
new ArrayBlockingQueue<>(statusList.length));
try {
// ignore all file status items that are not of interest
for (FileStatus regionStatus : statusList) {
if (null == regionStatus) {
continue;
}
if (!regionStatus.isDirectory()) {
continue;
}
Path regionPath = regionStatus.getPath();
if (null == regionPath) {
continue;
}
tpe.execute(new FSRegionScanner(fs, regionPath,
regionToBestLocalityRSMapping, regionDegreeLocalityMapping));
}
} finally {
tpe.shutdown();
int threadWakeFrequency = conf.getInt(HConstants.THREAD_WAKE_FREQUENCY,
60 * 1000);
try {
// here we wait until TPE terminates, which is either naturally or by
// exceptions in the execution of the threads
while (!tpe.awaitTermination(threadWakeFrequency,
TimeUnit.MILLISECONDS)) {
// printing out rough estimate, so as to not introduce
// AtomicInteger
LOG.info("Locality checking is underway: { Scanned Regions : "
+ tpe.getCompletedTaskCount() + "/"
+ tpe.getTaskCount() + " }");
}
} catch (InterruptedException e) {
throw (InterruptedIOException)new InterruptedIOException().initCause(e);
}
}
long overhead = EnvironmentEdgeManager.currentTime() - startTime;
String overheadMsg = "Scan DFS for locality info takes " + overhead + " ms";
LOG.info(overheadMsg);
}
/**
* Do our short circuit read setup.
* Checks buffer size to use and whether to do checksumming in hbase or hdfs.
* @param conf
*/
public static void setupShortCircuitRead(final Configuration conf) {
// Check that the user has not set the "dfs.client.read.shortcircuit.skip.checksum" property.
boolean shortCircuitSkipChecksum =
conf.getBoolean("dfs.client.read.shortcircuit.skip.checksum", false);
boolean useHBaseChecksum = conf.getBoolean(HConstants.HBASE_CHECKSUM_VERIFICATION, true);
if (shortCircuitSkipChecksum) {
LOG.warn("Configuration \"dfs.client.read.shortcircuit.skip.checksum\" should not " +
"be set to true." + (useHBaseChecksum ? " HBase checksum doesn't require " +
"it, see https://issues.apache.org/jira/browse/HBASE-6868." : ""));
assert !shortCircuitSkipChecksum; //this will fail if assertions are on
}
checkShortCircuitReadBufferSize(conf);
}
/**
* Check if short circuit read buffer size is set and if not, set it to hbase value.
* @param conf
*/
public static void checkShortCircuitReadBufferSize(final Configuration conf) {
final int defaultSize = HConstants.DEFAULT_BLOCKSIZE * 2;
final int notSet = -1;
// DFSConfigKeys.DFS_CLIENT_READ_SHORTCIRCUIT_BUFFER_SIZE_KEY is only defined in h2
final String dfsKey = "dfs.client.read.shortcircuit.buffer.size";
int size = conf.getInt(dfsKey, notSet);
// If a size is set, return -- we will use it.
if (size != notSet) return;
// But short circuit buffer size is normally not set. Put in place the hbase wanted size.
int hbaseSize = conf.getInt("hbase." + dfsKey, defaultSize);
conf.setIfUnset(dfsKey, Integer.toString(hbaseSize));
}
/**
* @param c
* @return The DFSClient DFSHedgedReadMetrics instance or null if can't be found or not on hdfs.
* @throws IOException
*/
public static DFSHedgedReadMetrics getDFSHedgedReadMetrics(final Configuration c)
throws IOException {
if (!isHDFS(c)) return null;
// getHedgedReadMetrics is package private. Get the DFSClient instance that is internal
// to the DFS FS instance and make the method getHedgedReadMetrics accessible, then invoke it
// to get the singleton instance of DFSHedgedReadMetrics shared by DFSClients.
final String name = "getHedgedReadMetrics";
DFSClient dfsclient = ((DistributedFileSystem)FileSystem.get(c)).getClient();
Method m;
try {
m = dfsclient.getClass().getDeclaredMethod(name);
} catch (NoSuchMethodException e) {
LOG.warn("Failed find method " + name + " in dfsclient; no hedged read metrics: " +
e.getMessage());
return null;
} catch (SecurityException e) {
LOG.warn("Failed find method " + name + " in dfsclient; no hedged read metrics: " +
e.getMessage());
return null;
}
m.setAccessible(true);
try {
return (DFSHedgedReadMetrics)m.invoke(dfsclient);
} catch (IllegalAccessException e) {
LOG.warn("Failed invoking method " + name + " on dfsclient; no hedged read metrics: " +
e.getMessage());
return null;
} catch (IllegalArgumentException e) {
LOG.warn("Failed invoking method " + name + " on dfsclient; no hedged read metrics: " +
e.getMessage());
return null;
} catch (InvocationTargetException e) {
LOG.warn("Failed invoking method " + name + " on dfsclient; no hedged read metrics: " +
e.getMessage());
return null;
}
}
}