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HBASE-11906: Meta data loss with distributed log replay

This commit is contained in:
Jeffrey Zhong 2014-09-19 18:00:07 -07:00
parent 560e055813
commit 1c127220f0
4 changed files with 103 additions and 2 deletions
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5
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
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@ -145,8 +145,10 @@ import org.apache.hadoop.hbase.util.HashedBytes;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.zookeeper.ZKSplitLog;
import org.apache.hadoop.io.MultipleIOException;
import org.apache.hadoop.util.StringUtils;
import org.apache.zookeeper.KeeperException;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
@ -763,7 +765,8 @@ public class HRegion implements HeapSize { // , Writable{
// In distributedLogReplay mode, we don't know the last change sequence number because region
// is opened before recovery completes. So we add a safety bumper to avoid new sequence number
// overlaps used sequence numbers
nextSeqid += this.flushPerChanges + 10000000; // add another extra 10million
nextSeqid = HLogUtil.writeRegionOpenSequenceIdFile(this.fs.getFileSystem(),
this.fs.getRegionDir(), nextSeqid, (this.flushPerChanges + 10000000));
}
LOG.info("Onlined " + this.getRegionInfo().getShortNameToLog() +

1
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
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@ -72,6 +72,7 @@ public interface HLog {
// TODO: Implementation detail. Why in here?
Pattern EDITFILES_NAME_PATTERN = Pattern.compile("-?[0-9]+");
String RECOVERED_LOG_TMPFILE_SUFFIX = ".temp";
String SEQUENCE_ID_FILE_SUFFIX = "_seqid";
/**
* WAL Reader Interface

63
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogUtil.java
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@ -20,6 +20,8 @@
package org.apache.hadoop.hbase.regionserver.wal;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.NavigableSet;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicLong;
@ -92,7 +94,7 @@ public class HLogUtil {
public static Path getRegionDirRecoveredEditsDir(final Path regiondir) {
return new Path(regiondir, HConstants.RECOVERED_EDITS_DIR);
}
/**
* Move aside a bad edits file.
*
@ -303,4 +305,63 @@ public class HLogUtil {
}
return trx;
}
/**
* Create a file with name as region open sequence id
*
* @param fs
* @param regiondir
* @param newSeqId
* @param saftyBumper
* @return long new sequence Id value
* @throws IOException
*/
public static long writeRegionOpenSequenceIdFile(final FileSystem fs, final Path regiondir,
long newSeqId, long saftyBumper) throws IOException {
Path editsdir = HLogUtil.getRegionDirRecoveredEditsDir(regiondir);
long maxSeqId = 0;
FileStatus[] files = null;
if (fs.exists(editsdir)) {
files = FSUtils.listStatus(fs, editsdir, new PathFilter() {
@Override
public boolean accept(Path p) {
if (p.getName().endsWith(HLog.SEQUENCE_ID_FILE_SUFFIX)) {
return true;
}
return false;
}
});
if (files != null) {
for (FileStatus status : files) {
String fileName = status.getPath().getName();
try {
Long tmpSeqId = Long.parseLong(fileName.substring(0, fileName.length()
- HLog.SEQUENCE_ID_FILE_SUFFIX.length()));
maxSeqId = Math.max(tmpSeqId, maxSeqId);
} catch (NumberFormatException ex) {
LOG.warn("Invalid SeqId File Name=" + fileName);
}
}
}
}
if (maxSeqId > newSeqId) {
newSeqId = maxSeqId;
}
newSeqId += saftyBumper; // bump up SeqId
// write a new seqId file
Path newSeqIdFile = new Path(editsdir, newSeqId + HLog.SEQUENCE_ID_FILE_SUFFIX);
if (!fs.createNewFile(newSeqIdFile)) {
throw new IOException("Failed to create SeqId file:" + newSeqIdFile);
}
// remove old ones
if(files != null) {
for (FileStatus status : files) {
fs.delete(status.getPath(), false);
}
}
return newSeqId;
}
}

36
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestDistributedLogSplitting.java
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@ -53,6 +53,7 @@ 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.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
@ -1367,6 +1368,41 @@ public class TestDistributedLogSplitting {
ht.close();
}
@Test(timeout = 300000)
public void testReadWriteSeqIdFiles() throws Exception {
LOG.info("testReadWriteSeqIdFiles");
startCluster(2);
final ZooKeeperWatcher zkw = new ZooKeeperWatcher(conf, "table-creation", null);
HTable ht = installTable(zkw, "table", "family", 10);
FileSystem fs = master.getMasterFileSystem().getFileSystem();
Path tableDir = FSUtils.getTableDir(FSUtils.getRootDir(conf), TableName.valueOf("table"));
List<Path> regionDirs = FSUtils.getRegionDirs(fs, tableDir);
HLogUtil.writeRegionOpenSequenceIdFile(fs, regionDirs.get(0) , 1L, 1000L);
// current SeqId file has seqid=1001
HLogUtil.writeRegionOpenSequenceIdFile(fs, regionDirs.get(0) , 1L, 1000L);
// current SeqId file has seqid=2001
assertEquals(3001, HLogUtil.writeRegionOpenSequenceIdFile(fs, regionDirs.get(0) , 3L, 1000L));
Path editsdir = HLogUtil.getRegionDirRecoveredEditsDir(regionDirs.get(0));
FileStatus[] files = FSUtils.listStatus(fs, editsdir, new PathFilter() {
@Override
public boolean accept(Path p) {
if (p.getName().endsWith(HLog.SEQUENCE_ID_FILE_SUFFIX)) {
return true;
}
return false;
}
});
// only one seqid file should exist
assertEquals(1, files.length);
// verify all seqId files aren't treated as recovered.edits files
NavigableSet<Path> recoveredEdits = HLogUtil.getSplitEditFilesSorted(fs, regionDirs.get(0));
assertEquals(0, recoveredEdits.size());
ht.close();
}
HTable installTable(ZooKeeperWatcher zkw, String tname, String fname, int nrs) throws Exception {
return installTable(zkw, tname, fname, nrs, 0);
}