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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.wal;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.NavigableSet;
import java.util.TreeSet;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileAlreadyExistsException;
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.hbase.Cell;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.CommonFSUtils;
import org.apache.hadoop.hbase.util.ConcurrentMapUtils.IOExceptionSupplier;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.zookeeper.ZKSplitLog;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;
/**
* This class provides static methods to support WAL splitting related works
*/
@InterfaceAudience.Private
public final class WALSplitUtil {
private static final Logger LOG = LoggerFactory.getLogger(WALSplitUtil.class);
private static final Pattern EDITFILES_NAME_PATTERN = Pattern.compile("-?[0-9]+");
private static final String RECOVERED_LOG_TMPFILE_SUFFIX = ".temp";
private static final String SEQUENCE_ID_FILE_SUFFIX = ".seqid";
private static final String OLD_SEQUENCE_ID_FILE_SUFFIX = "_seqid";
private static final int SEQUENCE_ID_FILE_SUFFIX_LENGTH = SEQUENCE_ID_FILE_SUFFIX.length();
private WALSplitUtil() {
}
/**
* Completes the work done by splitLogFile by archiving logs
*
* It is invoked by SplitLogManager once it knows that one of the SplitLogWorkers have completed
* the splitLogFile() part. If the master crashes then this function might get called multiple
* times.
*
*/
public static void finishSplitLogFile(String logfile, Configuration conf) throws IOException {
Path walDir = CommonFSUtils.getWALRootDir(conf);
Path oldLogDir = new Path(walDir, HConstants.HREGION_OLDLOGDIR_NAME);
Path walPath;
if (CommonFSUtils.isStartingWithPath(walDir, logfile)) {
walPath = new Path(logfile);
} else {
walPath = new Path(walDir, logfile);
}
FileSystem walFS = walDir.getFileSystem(conf);
boolean corrupt = ZKSplitLog.isCorrupted(walDir, walPath.getName(), walFS);
archive(walPath, corrupt, oldLogDir, walFS, conf);
Path stagingDir = ZKSplitLog.getSplitLogDir(walDir, walPath.getName());
walFS.delete(stagingDir, true);
}
/**
* Moves processed logs to a oldLogDir after successful processing Moves corrupted logs (any log
* that couldn't be successfully parsed to corruptDir (.corrupt) for later investigation
*/
static void archive(final Path wal, final boolean corrupt, final Path oldWALDir,
final FileSystem walFS, final Configuration conf) throws IOException {
Path dir;
Path target;
if (corrupt) {
dir = new Path(CommonFSUtils.getWALRootDir(conf), HConstants.CORRUPT_DIR_NAME);
if (conf.get("hbase.regionserver.hlog.splitlog.corrupt.dir") != null) {
LOG.warn("hbase.regionserver.hlog.splitlog.corrupt.dir is deprecated. Default to {}", dir);
}
target = new Path(dir, wal.getName());
} else {
dir = oldWALDir;
target = AbstractFSWAL.getWALArchivePath(oldWALDir, wal);
}
mkdir(walFS, dir);
moveWAL(walFS, wal, target);
}
private static void mkdir(FileSystem fs, Path dir) throws IOException {
if (!fs.mkdirs(dir)) {
LOG.warn("Failed mkdir {}", dir);
}
}
/**
* Move WAL. Used to move processed WALs to archive or bad WALs to corrupt WAL dir. WAL may have
* already been moved; makes allowance.
*/
public static void moveWAL(FileSystem fs, Path p, Path targetDir) throws IOException {
if (fs.exists(p)) {
if (!CommonFSUtils.renameAndSetModifyTime(fs, p, targetDir)) {
LOG.warn("Failed move of {} to {}", p, targetDir);
} else {
LOG.info("Moved {} to {}", p, targetDir);
}
}
}
/**
* Path to a file under RECOVERED_EDITS_DIR directory of the region found in logEntry
* named for the sequenceid in the passed logEntry: e.g.
* /hbase/some_table/2323432434/recovered.edits/2332. This method also ensures existence of
* RECOVERED_EDITS_DIR under the region creating it if necessary. And also set storage policy for
* RECOVERED_EDITS_DIR if WAL_STORAGE_POLICY is configured.
* @param tableName the table name
* @param encodedRegionName the encoded region name
* @param seqId the sequence id which used to generate file name
* @param fileNameBeingSplit the file being split currently. Used to generate tmp file name.
* @param tmpDirName of the directory used to sideline old recovered edits file
* @param conf configuration
* @return Path to file into which to dump split log edits.
*/
@SuppressWarnings("deprecation")
static Path getRegionSplitEditsPath(TableName tableName, byte[] encodedRegionName, long seqId,
String fileNameBeingSplit, String tmpDirName, Configuration conf) throws IOException {
FileSystem walFS = CommonFSUtils.getWALFileSystem(conf);
Path tableDir = CommonFSUtils.getWALTableDir(conf, tableName);
String encodedRegionNameStr = Bytes.toString(encodedRegionName);
Path regionDir = HRegion.getRegionDir(tableDir, encodedRegionNameStr);
Path dir = getRegionDirRecoveredEditsDir(regionDir);
if (walFS.exists(dir) && walFS.isFile(dir)) {
Path tmp = new Path(tmpDirName);
if (!walFS.exists(tmp)) {
walFS.mkdirs(tmp);
}
tmp = new Path(tmp, HConstants.RECOVERED_EDITS_DIR + "_" + encodedRegionNameStr);
LOG.warn("Found existing old file: {}. It could be some "
+ "leftover of an old installation. It should be a folder instead. " + "So moving it to {}",
dir, tmp);
if (!walFS.rename(dir, tmp)) {
LOG.warn("Failed to sideline old file {}", dir);
}
}
if (!walFS.exists(dir) && !walFS.mkdirs(dir)) {
LOG.warn("mkdir failed on {}", dir);
} else {
String storagePolicy =
conf.get(HConstants.WAL_STORAGE_POLICY, HConstants.DEFAULT_WAL_STORAGE_POLICY);
CommonFSUtils.setStoragePolicy(walFS, dir, storagePolicy);
}
// Append fileBeingSplit to prevent name conflict since we may have duplicate wal entries now.
// Append file name ends with RECOVERED_LOG_TMPFILE_SUFFIX to ensure
// region's replayRecoveredEdits will not delete it
String fileName = formatRecoveredEditsFileName(seqId);
fileName = getTmpRecoveredEditsFileName(fileName + "-" + fileNameBeingSplit);
return new Path(dir, fileName);
}
private static String getTmpRecoveredEditsFileName(String fileName) {
return fileName + RECOVERED_LOG_TMPFILE_SUFFIX;
}
/**
* Get the completed recovered edits file path, renaming it to be by last edit in the file from
* its first edit. Then we could use the name to skip recovered edits when doing
* HRegion#replayRecoveredEditsIfAny(Map, CancelableProgressable, MonitoredTask).
* @return dstPath take file's last edit log seq num as the name
*/
static Path getCompletedRecoveredEditsFilePath(Path srcPath, long maximumEditWALSeqNum) {
String fileName = formatRecoveredEditsFileName(maximumEditWALSeqNum);
return new Path(srcPath.getParent(), fileName);
}
static String formatRecoveredEditsFileName(final long seqid) {
return String.format("%019d", seqid);
}
/**
* @param regionDir This regions directory in the filesystem.
* @return The directory that holds recovered edits files for the region regionDir
*/
public static Path getRegionDirRecoveredEditsDir(final Path regionDir) {
return new Path(regionDir, HConstants.RECOVERED_EDITS_DIR);
}
/**
* Check whether there is recovered.edits in the region dir
* @param conf conf
* @param regionInfo the region to check
* @return true if recovered.edits exist in the region dir
*/
public static boolean hasRecoveredEdits(final Configuration conf, final RegionInfo regionInfo)
throws IOException {
// No recovered.edits for non default replica regions
if (regionInfo.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {
return false;
}
// Only default replica region can reach here, so we can use regioninfo
// directly without converting it to default replica's regioninfo.
Path regionWALDir =
CommonFSUtils.getWALRegionDir(conf, regionInfo.getTable(), regionInfo.getEncodedName());
Path regionDir = FSUtils.getRegionDirFromRootDir(CommonFSUtils.getRootDir(conf), regionInfo);
Path wrongRegionWALDir =
CommonFSUtils.getWrongWALRegionDir(conf, regionInfo.getTable(), regionInfo.getEncodedName());
FileSystem walFs = CommonFSUtils.getWALFileSystem(conf);
FileSystem rootFs = CommonFSUtils.getRootDirFileSystem(conf);
NavigableSet files = getSplitEditFilesSorted(walFs, regionWALDir);
if (!files.isEmpty()) {
return true;
}
files = getSplitEditFilesSorted(rootFs, regionDir);
if (!files.isEmpty()) {
return true;
}
files = getSplitEditFilesSorted(walFs, wrongRegionWALDir);
return !files.isEmpty();
}
/**
* This method will check 3 places for finding the max sequence id file. One is the expected
* place, another is the old place under the region directory, and the last one is the wrong one
* we introduced in HBASE-20734. See HBASE-22617 for more details.
*
* Notice that, you should always call this method instead of
* {@link #getMaxRegionSequenceId(FileSystem, Path)} until 4.0.0 release.
* @deprecated Only for compatibility, will be removed in 4.0.0.
*/
@Deprecated
public static long getMaxRegionSequenceId(Configuration conf, RegionInfo region,
IOExceptionSupplier rootFsSupplier, IOExceptionSupplier walFsSupplier)
throws IOException {
FileSystem rootFs = rootFsSupplier.get();
FileSystem walFs = walFsSupplier.get();
Path regionWALDir =
CommonFSUtils.getWALRegionDir(conf, region.getTable(), region.getEncodedName());
// This is the old place where we store max sequence id file
Path regionDir = FSUtils.getRegionDirFromRootDir(CommonFSUtils.getRootDir(conf), region);
// This is for HBASE-20734, where we use a wrong directory, see HBASE-22617 for more details.
Path wrongRegionWALDir =
CommonFSUtils.getWrongWALRegionDir(conf, region.getTable(), region.getEncodedName());
long maxSeqId = getMaxRegionSequenceId(walFs, regionWALDir);
maxSeqId = Math.max(maxSeqId, getMaxRegionSequenceId(rootFs, regionDir));
maxSeqId = Math.max(maxSeqId, getMaxRegionSequenceId(walFs, wrongRegionWALDir));
return maxSeqId;
}
/**
* Returns sorted set of edit files made by splitter, excluding files with '.temp' suffix.
* @param walFS WAL FileSystem used to retrieving split edits files.
* @param regionDir WAL region dir to look for recovered edits files under.
* @return Files in passed regionDir as a sorted set.
*/
public static NavigableSet getSplitEditFilesSorted(final FileSystem walFS,
final Path regionDir) throws IOException {
NavigableSet filesSorted = new TreeSet<>();
Path editsdir = getRegionDirRecoveredEditsDir(regionDir);
if (!walFS.exists(editsdir)) {
return filesSorted;
}
FileStatus[] files = CommonFSUtils.listStatus(walFS, editsdir, new PathFilter() {
@Override
public boolean accept(Path p) {
boolean result = false;
try {
// Return files and only files that match the editfile names pattern.
// There can be other files in this directory other than edit files.
// In particular, on error, we'll move aside the bad edit file giving
// it a timestamp suffix. See moveAsideBadEditsFile.
Matcher m = EDITFILES_NAME_PATTERN.matcher(p.getName());
result = walFS.isFile(p) && m.matches();
// Skip the file whose name ends with RECOVERED_LOG_TMPFILE_SUFFIX,
// because it means splitwal thread is writting this file.
if (p.getName().endsWith(RECOVERED_LOG_TMPFILE_SUFFIX)) {
result = false;
}
// Skip SeqId Files
if (isSequenceIdFile(p)) {
result = false;
}
} catch (IOException e) {
LOG.warn("Failed isFile check on {}", p, e);
}
return result;
}
});
if (ArrayUtils.isNotEmpty(files)) {
Arrays.asList(files).forEach(status -> filesSorted.add(status.getPath()));
}
return filesSorted;
}
/**
* Move aside a bad edits file.
* @param fs the file system used to rename bad edits file.
* @param edits Edits file to move aside.
* @return The name of the moved aside file.
*/
public static Path moveAsideBadEditsFile(final FileSystem fs, final Path edits)
throws IOException {
Path moveAsideName =
new Path(edits.getParent(), edits.getName() + "." + EnvironmentEdgeManager.currentTime());
if (!fs.rename(edits, moveAsideName)) {
LOG.warn("Rename failed from {} to {}", edits, moveAsideName);
}
return moveAsideName;
}
/**
* Is the given file a region open sequence id file.
*/
public static boolean isSequenceIdFile(final Path file) {
return file.getName().endsWith(SEQUENCE_ID_FILE_SUFFIX)
|| file.getName().endsWith(OLD_SEQUENCE_ID_FILE_SUFFIX);
}
private static FileStatus[] getSequenceIdFiles(FileSystem walFS, Path regionDir)
throws IOException {
// TODO: Why are we using a method in here as part of our normal region open where
// there is no splitting involved? Fix. St.Ack 01/20/2017.
Path editsDir = getRegionDirRecoveredEditsDir(regionDir);
try {
FileStatus[] files = walFS.listStatus(editsDir, WALSplitUtil::isSequenceIdFile);
return files != null ? files : new FileStatus[0];
} catch (FileNotFoundException e) {
return new FileStatus[0];
}
}
private static long getMaxSequenceId(FileStatus[] files) {
long maxSeqId = -1L;
for (FileStatus file : files) {
String fileName = file.getPath().getName();
try {
maxSeqId = Math.max(maxSeqId, Long
.parseLong(fileName.substring(0, fileName.length() - SEQUENCE_ID_FILE_SUFFIX_LENGTH)));
} catch (NumberFormatException ex) {
LOG.warn("Invalid SeqId File Name={}", fileName);
}
}
return maxSeqId;
}
/**
* Get the max sequence id which is stored in the region directory. -1 if none.
*/
public static long getMaxRegionSequenceId(FileSystem walFS, Path regionDir) throws IOException {
return getMaxSequenceId(getSequenceIdFiles(walFS, regionDir));
}
/**
* Create a file with name as region's max sequence id
*/
public static void writeRegionSequenceIdFile(FileSystem walFS, Path regionDir, long newMaxSeqId)
throws IOException {
FileStatus[] files = getSequenceIdFiles(walFS, regionDir);
long maxSeqId = getMaxSequenceId(files);
if (maxSeqId > newMaxSeqId) {
throw new IOException("The new max sequence id " + newMaxSeqId
+ " is less than the old max sequence id " + maxSeqId);
}
// write a new seqId file
Path newSeqIdFile =
new Path(getRegionDirRecoveredEditsDir(regionDir), newMaxSeqId + SEQUENCE_ID_FILE_SUFFIX);
if (newMaxSeqId != maxSeqId) {
try {
if (!walFS.createNewFile(newSeqIdFile) && !walFS.exists(newSeqIdFile)) {
throw new IOException("Failed to create SeqId file:" + newSeqIdFile);
}
LOG.debug("Wrote file={}, newMaxSeqId={}, maxSeqId={}", newSeqIdFile, newMaxSeqId,
maxSeqId);
} catch (FileAlreadyExistsException ignored) {
// latest hdfs throws this exception. it's all right if newSeqIdFile already exists
}
}
// remove old ones
for (FileStatus status : files) {
if (!newSeqIdFile.equals(status.getPath())) {
walFS.delete(status.getPath(), false);
}
}
}
/** A struct used by getMutationsFromWALEntry */
public static class MutationReplay implements Comparable {
public MutationReplay(ClientProtos.MutationProto.MutationType type, Mutation mutation,
long nonceGroup, long nonce) {
this.type = type;
this.mutation = mutation;
if (this.mutation.getDurability() != Durability.SKIP_WAL) {
// using ASYNC_WAL for relay
this.mutation.setDurability(Durability.ASYNC_WAL);
}
this.nonceGroup = nonceGroup;
this.nonce = nonce;
}
private final ClientProtos.MutationProto.MutationType type;
@SuppressWarnings("checkstyle:VisibilityModifier")
public final Mutation mutation;
@SuppressWarnings("checkstyle:VisibilityModifier")
public final long nonceGroup;
@SuppressWarnings("checkstyle:VisibilityModifier")
public final long nonce;
@Override
public int compareTo(final MutationReplay d) {
return this.mutation.compareTo(d.mutation);
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof MutationReplay)) {
return false;
} else {
return this.compareTo((MutationReplay) obj) == 0;
}
}
@Override
public int hashCode() {
return this.mutation.hashCode();
}
public ClientProtos.MutationProto.MutationType getType() {
return type;
}
}
/**
* This function is used to construct mutations from a WALEntry. It also reconstructs WALKey &
* WALEdit from the passed in WALEntry
* @param logEntry pair of WALKey and WALEdit instance stores WALKey and WALEdit instances
* extracted from the passed in WALEntry.
* @return list of Pair<MutationType, Mutation> to be replayed
*/
public static List getMutationsFromWALEntry(AdminProtos.WALEntry entry,
CellScanner cells, Pair logEntry, Durability durability) throws IOException {
if (entry == null) {
// return an empty array
return Collections.emptyList();
}
long replaySeqId = (entry.getKey().hasOrigSequenceNumber())
? entry.getKey().getOrigSequenceNumber()
: entry.getKey().getLogSequenceNumber();
int count = entry.getAssociatedCellCount();
List mutations = new ArrayList<>();
Cell previousCell = null;
Mutation m = null;
WALKeyImpl key = null;
WALEdit val = null;
if (logEntry != null) {
val = new WALEdit();
}
for (int i = 0; i < count; i++) {
// Throw index out of bounds if our cell count is off
if (!cells.advance()) {
throw new ArrayIndexOutOfBoundsException("Expected=" + count + ", index=" + i);
}
Cell cell = cells.current();
if (val != null) {
val.add(cell);
}
boolean isNewRowOrType =
previousCell == null || previousCell.getTypeByte() != cell.getTypeByte()
|| !CellUtil.matchingRows(previousCell, cell);
if (isNewRowOrType) {
// Create new mutation
if (CellUtil.isDelete(cell)) {
m = new Delete(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength());
// Deletes don't have nonces.
mutations.add(new MutationReplay(ClientProtos.MutationProto.MutationType.DELETE, m,
HConstants.NO_NONCE, HConstants.NO_NONCE));
} else {
m = new Put(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength());
// Puts might come from increment or append, thus we need nonces.
long nonceGroup =
entry.getKey().hasNonceGroup() ? entry.getKey().getNonceGroup() : HConstants.NO_NONCE;
long nonce = entry.getKey().hasNonce() ? entry.getKey().getNonce() : HConstants.NO_NONCE;
mutations.add(
new MutationReplay(ClientProtos.MutationProto.MutationType.PUT, m, nonceGroup, nonce));
}
}
if (CellUtil.isDelete(cell)) {
((Delete) m).add(cell);
} else {
((Put) m).add(cell);
}
m.setDurability(durability);
previousCell = cell;
}
// reconstruct WALKey
if (logEntry != null) {
org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.WALKey walKeyProto =
entry.getKey();
List clusterIds = new ArrayList<>(walKeyProto.getClusterIdsCount());
for (HBaseProtos.UUID uuid : entry.getKey().getClusterIdsList()) {
clusterIds.add(new UUID(uuid.getMostSigBits(), uuid.getLeastSigBits()));
}
key = new WALKeyImpl(walKeyProto.getEncodedRegionName().toByteArray(),
TableName.valueOf(walKeyProto.getTableName().toByteArray()), replaySeqId,
walKeyProto.getWriteTime(), clusterIds, walKeyProto.getNonceGroup(), walKeyProto.getNonce(),
null);
logEntry.setFirst(key);
logEntry.setSecond(val);
}
return mutations;
}
/**
* Return path to recovered.hfiles directory of the region's column family: e.g.
* /hbase/some_table/2323432434/cf/recovered.hfiles/. This method also ensures existence of
* recovered.hfiles directory under the region's column family, creating it if necessary.
* @param rootFS the root file system
* @param conf configuration
* @param tableName the table name
* @param encodedRegionName the encoded region name
* @param familyName the column family name
* @return Path to recovered.hfiles directory of the region's column family.
*/
static Path tryCreateRecoveredHFilesDir(FileSystem rootFS, Configuration conf,
TableName tableName, String encodedRegionName, String familyName) throws IOException {
Path rootDir = CommonFSUtils.getRootDir(conf);
Path regionDir = FSUtils.getRegionDirFromTableDir(CommonFSUtils.getTableDir(rootDir, tableName),
encodedRegionName);
Path dir = getRecoveredHFilesDir(regionDir, familyName);
if (!rootFS.exists(dir) && !rootFS.mkdirs(dir)) {
LOG.warn("mkdir failed on {}, region {}, column family {}", dir, encodedRegionName,
familyName);
}
return dir;
}
/**
* @param regionDir This regions directory in the filesystem
* @param familyName The column family name
* @return The directory that holds recovered hfiles for the region's column family
*/
private static Path getRecoveredHFilesDir(final Path regionDir, String familyName) {
return new Path(new Path(regionDir, familyName), HConstants.RECOVERED_HFILES_DIR);
}
public static FileStatus[] getRecoveredHFiles(final FileSystem rootFS, final Path regionDir,
String familyName) throws IOException {
Path dir = getRecoveredHFilesDir(regionDir, familyName);
return CommonFSUtils.listStatus(rootFS, dir);
}
}