org.apache.hadoop.hbase.wal

Class WALSplitUtil

java.lang.Object

org.apache.hadoop.hbase.wal.WALSplitUtil

@InterfaceAudience.Private
public final class WALSplitUtil
extends Object

This class provides static methods to support WAL splitting related works

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WALSplitUtil.MutationReplay A struct used by getMutationsFromWALEntry

Field Summary

Fields

Modifier and Type	Field and Description
private static Pattern	EDITFILES_NAME_PATTERN
private static org.slf4j.Logger	LOG
private static String	OLD_SEQUENCE_ID_FILE_SUFFIX
private static String	RECOVERED_LOG_TMPFILE_SUFFIX
private static String	SEQUENCE_ID_FILE_SUFFIX
private static int	SEQUENCE_ID_FILE_SUFFIX_LENGTH

Constructor Summary

Constructors

Modifier	Constructor and Description
private	WALSplitUtil()

Method Summary

Modifier and Type	Method and Description
private static void	archiveWALs(List<org.apache.hadoop.fs.Path> corruptedWALs, List<org.apache.hadoop.fs.Path> processedWALs, org.apache.hadoop.fs.Path oldWALDir, org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.conf.Configuration conf) 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
(package private) static void	finishSplitLogFile(org.apache.hadoop.fs.Path walDir, org.apache.hadoop.fs.Path oldWALDir, org.apache.hadoop.fs.Path walPath, org.apache.hadoop.conf.Configuration conf)
static void	finishSplitLogFile(String logfile, org.apache.hadoop.conf.Configuration conf) Completes the work done by splitLogFile by archiving logs
(package private) static String	formatRecoveredEditsFileName(long seqid)
(package private) static org.apache.hadoop.fs.Path	getCompletedRecoveredEditsFilePath(org.apache.hadoop.fs.Path srcPath, long maximumEditWALSeqNum) Get the completed recovered edits file path, renaming it to be by last edit in the file from its first edit.
static long	getMaxRegionSequenceId(org.apache.hadoop.conf.Configuration conf, RegionInfo region, ConcurrentMapUtils.IOExceptionSupplier<org.apache.hadoop.fs.FileSystem> rootFsSupplier, ConcurrentMapUtils.IOExceptionSupplier<org.apache.hadoop.fs.FileSystem> walFsSupplier) Deprecated. Only for compatibility, will be removed in 4.0.0.
static long	getMaxRegionSequenceId(org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.fs.Path regionDir) Get the max sequence id which is stored in the region directory.
private static long	getMaxSequenceId(org.apache.hadoop.fs.FileStatus[] files)
static List<WALSplitUtil.MutationReplay>	getMutationsFromWALEntry(org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.WALEntry entry, CellScanner cells, Pair<WALKey,WALEdit> logEntry, Durability durability) This function is used to construct mutations from a WALEntry.
static org.apache.hadoop.fs.Path	getRegionDirRecoveredEditsDir(org.apache.hadoop.fs.Path regionDir)
(package private) static org.apache.hadoop.fs.Path	getRegionSplitEditsPath(WAL.Entry walEntry, String fileNameBeingSplit, String tmpDirName, org.apache.hadoop.conf.Configuration conf) 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.
private static org.apache.hadoop.fs.FileStatus[]	getSequenceIdFiles(org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.fs.Path regionDir)
static NavigableSet<org.apache.hadoop.fs.Path>	getSplitEditFilesSorted(org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.fs.Path regionDir) Returns sorted set of edit files made by splitter, excluding files with '.temp' suffix.
private static String	getTmpRecoveredEditsFileName(String fileName)
static boolean	hasRecoveredEdits(org.apache.hadoop.conf.Configuration conf, RegionInfo regionInfo) Check whether there is recovered.edits in the region dir
static boolean	isSequenceIdFile(org.apache.hadoop.fs.Path file) Is the given file a region open sequence id file.
static org.apache.hadoop.fs.Path	moveAsideBadEditsFile(org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.fs.Path edits) Move aside a bad edits file.
static void	writeRegionSequenceIdFile(org.apache.hadoop.fs.FileSystem walFS, org.apache.hadoop.fs.Path regionDir, long newMaxSeqId) Create a file with name as region's max sequence id

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

private static final org.slf4j.Logger LOG

EDITFILES_NAME_PATTERN

private static final Pattern EDITFILES_NAME_PATTERN

RECOVERED_LOG_TMPFILE_SUFFIX

private static final String RECOVERED_LOG_TMPFILE_SUFFIX

See Also:

Constant Field Values

SEQUENCE_ID_FILE_SUFFIX

private static final String SEQUENCE_ID_FILE_SUFFIX

See Also:

Constant Field Values

OLD_SEQUENCE_ID_FILE_SUFFIX

private static final String OLD_SEQUENCE_ID_FILE_SUFFIX

See Also:

Constant Field Values

SEQUENCE_ID_FILE_SUFFIX_LENGTH

private static final int SEQUENCE_ID_FILE_SUFFIX_LENGTH

Constructor Detail

WALSplitUtil

private WALSplitUtil()

Method Detail

finishSplitLogFile

public static void finishSplitLogFile(String logfile,
                                      org.apache.hadoop.conf.Configuration conf)
                               throws IOException

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.

Parameters:

logfile -

conf -

Throws:

IOException

finishSplitLogFile

static void finishSplitLogFile(org.apache.hadoop.fs.Path walDir,
                               org.apache.hadoop.fs.Path oldWALDir,
                               org.apache.hadoop.fs.Path walPath,
                               org.apache.hadoop.conf.Configuration conf)
                        throws IOException

Throws:

IOException

archiveWALs

private static void archiveWALs(List<org.apache.hadoop.fs.Path> corruptedWALs,
                                List<org.apache.hadoop.fs.Path> processedWALs,
                                org.apache.hadoop.fs.Path oldWALDir,
                                org.apache.hadoop.fs.FileSystem walFS,
                                org.apache.hadoop.conf.Configuration conf)
                         throws IOException

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

Throws:

IOException

getRegionSplitEditsPath

static org.apache.hadoop.fs.Path getRegionSplitEditsPath(WAL.Entry walEntry,
                                                         String fileNameBeingSplit,
                                                         String tmpDirName,
                                                         org.apache.hadoop.conf.Configuration conf)
                                                  throws IOException

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.

Parameters:

walEntry - walEntry to recover

fileNameBeingSplit - the file being split currently. Used to generate tmp file name.

tmpDirName - of the directory used to sideline old recovered edits file

conf - configuration

Returns:

Path to file into which to dump split log edits.

Throws:

IOException

getTmpRecoveredEditsFileName

private static String getTmpRecoveredEditsFileName(String fileName)

getCompletedRecoveredEditsFilePath

static org.apache.hadoop.fs.Path getCompletedRecoveredEditsFilePath(org.apache.hadoop.fs.Path srcPath,
                                                                    long maximumEditWALSeqNum)

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(java.util.Map<byte[], java.lang.Long>, org.apache.hadoop.hbase.util.CancelableProgressable, org.apache.hadoop.hbase.monitoring.MonitoredTask).

Returns:

dstPath take file's last edit log seq num as the name

formatRecoveredEditsFileName

static String formatRecoveredEditsFileName(long seqid)

getRegionDirRecoveredEditsDir

public static org.apache.hadoop.fs.Path getRegionDirRecoveredEditsDir(org.apache.hadoop.fs.Path regionDir)

Parameters:

regionDir - This regions directory in the filesystem.

Returns:

The directory that holds recovered edits files for the region regionDir

hasRecoveredEdits

public static boolean hasRecoveredEdits(org.apache.hadoop.conf.Configuration conf,
                                        RegionInfo regionInfo)
                                 throws IOException

Check whether there is recovered.edits in the region dir

Parameters:

conf - conf

regionInfo - the region to check

Returns:

true if recovered.edits exist in the region dir

Throws:

IOException

getMaxRegionSequenceId

@Deprecated
public static long getMaxRegionSequenceId(org.apache.hadoop.conf.Configuration conf,
                                                      RegionInfo region,
                                                      ConcurrentMapUtils.IOExceptionSupplier<org.apache.hadoop.fs.FileSystem> rootFsSupplier,
                                                      ConcurrentMapUtils.IOExceptionSupplier<org.apache.hadoop.fs.FileSystem> walFsSupplier)
                                               throws IOException

Deprecated. Only for compatibility, will be removed in 4.0.0.

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 getMaxRegionSequenceId(FileSystem, Path) until 4.0.0 release.

Throws:

IOException

getSplitEditFilesSorted

public static NavigableSet<org.apache.hadoop.fs.Path> getSplitEditFilesSorted(org.apache.hadoop.fs.FileSystem walFS,
                                                                              org.apache.hadoop.fs.Path regionDir)
                                                                       throws IOException

Returns sorted set of edit files made by splitter, excluding files with '.temp' suffix.

Parameters:

walFS - WAL FileSystem used to retrieving split edits files.

regionDir - WAL region dir to look for recovered edits files under.

Returns:

Files in passed regionDir as a sorted set.

Throws:

IOException

moveAsideBadEditsFile

public static org.apache.hadoop.fs.Path moveAsideBadEditsFile(org.apache.hadoop.fs.FileSystem walFS,
                                                              org.apache.hadoop.fs.Path edits)
                                                       throws IOException

Move aside a bad edits file.

Parameters:

walFS - WAL FileSystem used to rename bad edits file.

edits - Edits file to move aside.

Returns:

The name of the moved aside file.

Throws:

IOException

isSequenceIdFile

public static boolean isSequenceIdFile(org.apache.hadoop.fs.Path file)

Is the given file a region open sequence id file.

getSequenceIdFiles

private static org.apache.hadoop.fs.FileStatus[] getSequenceIdFiles(org.apache.hadoop.fs.FileSystem walFS,
                                                                    org.apache.hadoop.fs.Path regionDir)
                                                             throws IOException

Throws:

IOException

getMaxSequenceId

private static long getMaxSequenceId(org.apache.hadoop.fs.FileStatus[] files)

getMaxRegionSequenceId

public static long getMaxRegionSequenceId(org.apache.hadoop.fs.FileSystem walFS,
                                          org.apache.hadoop.fs.Path regionDir)
                                   throws IOException

Get the max sequence id which is stored in the region directory. -1 if none.

Throws:

IOException

writeRegionSequenceIdFile

public static void writeRegionSequenceIdFile(org.apache.hadoop.fs.FileSystem walFS,
                                             org.apache.hadoop.fs.Path regionDir,
                                             long newMaxSeqId)
                                      throws IOException

Create a file with name as region's max sequence id

Throws:

IOException

getMutationsFromWALEntry

public static List<WALSplitUtil.MutationReplay> getMutationsFromWALEntry(org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.WALEntry entry,
                                                                         CellScanner cells,
                                                                         Pair<WALKey,WALEdit> logEntry,
                                                                         Durability durability)
                                                                  throws IOException

This function is used to construct mutations from a WALEntry. It also reconstructs WALKey & WALEdit from the passed in WALEntry

Parameters:

entry -

cells -

logEntry - pair of WALKey and WALEdit instance stores WALKey and WALEdit instances extracted from the passed in WALEntry.

Returns:

list of Pair<MutationType, Mutation> to be replayed

Throws:

IOException