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/**
*
* 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 org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
import org.apache.hbase.thirdparty.com.google.common.base.Throwables;
import org.apache.hbase.thirdparty.com.google.common.collect.Iterators;
import org.apache.hbase.thirdparty.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.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.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.Path;
import org.apache.hadoop.fs.PathFilter;
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.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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;
/**
* Utility methods for interacting with the underlying file system.
*/
@InterfaceAudience.Private
public abstract class FSUtils extends CommonFSUtils {
private static final Logger LOG = LoggerFactory.getLogger(FSUtils.class);
private static final String THREAD_POOLSIZE = "hbase.client.localityCheck.threadPoolSize";
private static final int DEFAULT_THREAD_POOLSIZE = 2;
/** Set to true on Windows platforms */
@VisibleForTesting // currently only used in testing. TODO refactor into a test class
public static final boolean WINDOWS = System.getProperty("os.name").startsWith("Windows");
protected FSUtils() {
super();
}
/**
* @return True is fs 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 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 pathTail is tail on the path of pathToSearch
*/
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 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()));
}
/**
* Create the specified file on the filesystem. By default, this will:
*
* - overwrite the file if it exists
* - apply the umask in the configuration (if it is enabled)
* - use the fs configured buffer size (or 4096 if not set)
* - use the configured column family replication or default replication if
* {@link HColumnDescriptor#DEFAULT_DFS_REPLICATION}
* - use the default block size
* - not track progress
*
* @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);
}
/**
* 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 version 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 true if the file exists, otherwise false
* @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;
}
}
}
}
/**
* 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);
}
}
}
/**
* 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 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 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 getTableFragmentation(
final FileSystem fs, final Path hbaseRootDir)
throws IOException {
Map frags = new HashMap<>();
int cfCountTotal = 0;
int cfFragTotal = 0;
PathFilter regionFilter = new RegionDirFilter(fs);
PathFilter familyFilter = new FamilyDirFilter(fs);
List 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;
}
/**
* 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 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
* null, all directories are returned
*/
@SuppressWarnings("unchecked")
public BlackListDirFilter(final FileSystem fs, final List directoryNameBlackList) {
this.fs = fs;
blacklist =
(List) (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 null 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;
}
}
/**
* 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 getTableDirs(final FileSystem fs, final Path rootdir)
throws IOException {
List 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 rootdir. Ignore non table hbase folders such as
* .logs, .oldlogs, .corrupt folders.
* @throws IOException
*/
public static List 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 tabledirs = new ArrayList<>(dirs.length);
for (FileStatus dir: dirs) {
tabledirs.add(dir.getPath());
}
return tabledirs;
}
/**
* 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 getRegionDirs(final FileSystem fs, final Path tableDir) throws IOException {
// assumes we are in a table dir.
List rds = listStatusWithStatusFilter(fs, tableDir, new RegionDirFilter(fs));
if (rds == null) {
return new ArrayList<>();
}
List 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 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 familyDirs = new ArrayList<>(fds.length);
for (FileStatus fdfs: fds) {
Path fdPath = fdfs.getPath();
familyDirs.add(fdPath);
}
return familyDirs;
}
public static List getReferenceFilePaths(final FileSystem fs, final Path familyDir) throws IOException {
List fds = listStatusWithStatusFilter(fs, familyDir, new ReferenceFileFilter(fs));
if (fds == null) {
return new ArrayList<>();
}
List 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;
}
}
}
/**
* Runs through the HBase rootdir/tablename and creates a reverse lookup map for
* table StoreFile names to the full Path.
*
* Example...
* Key = 3944417774205889744
* 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 getTableStoreFilePathMap(Map 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.
*
* Example...
* Key = 3944417774205889744
* 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 getTableStoreFilePathMap(
Map resultMap,
final FileSystem fs, final Path hbaseRootDir, TableName tableName, final PathFilter sfFilter,
ExecutorService executor, final ErrorReporter errors) throws IOException, InterruptedException {
final Map 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 exceptions = new Vector<>();
try {
List regionDirs = FSUtils.listStatusWithStatusFilter(fs, tableDir, new RegionDirFilter(fs));
if (regionDirs == null) {
return finalResultMap;
}
final List> 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 regionStoreFileMap = new HashMap<>();
List 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.
*
* Example...
* Key = 3944417774205889744
* 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 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.
*
* Example...
* Key = 3944417774205889744
* 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 getTableStoreFilePathMap(
final FileSystem fs, final Path hbaseRootDir, PathFilter sfFilter,
ExecutorService executor, ErrorReporter errors)
throws IOException, InterruptedException {
ConcurrentHashMap 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 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 filterFileStatuses(Iterator input,
FileStatusFilter filter) {
if (input == null) return null;
ArrayList 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 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 status2 = filterFileStatuses(status, filter);
if (status2 == null || status2.isEmpty()) {
return null;
} else {
return status2;
}
}
}
/**
* 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;
}
/**
* 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> 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> getRegionDegreeLocalityMappingFromFS(
final Configuration conf, final String desiredTable, int threadPoolSize)
throws IOException {
Map> 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 regionToBestLocalityRSMapping,
Map> 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///*
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;
}
}
}
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