/*
* Write some entries in the log file.
* 7 different tables with name "testtb-%d"
* 10 region per table with name "tableName-region-%d"
* 50 entry with row key "row-%d"
*/
private void writeTestLog(final Path logFile) throws IOException {
fs.mkdirs(logFile.getParent());
HLog.Writer writer = HLog.createWriter(fs, logFile, conf);
try {
for (int i = 0; i < 7; ++i) {
byte[] tableName = getTableName(i);
for (int j = 0; j < 10; ++j) {
byte[] regionName = getRegionName(tableName, j);
for (int k = 0; k < 50; ++k) {
byte[] rowkey = Bytes.toBytes("row-" + k);
HLogKey key =
new HLogKey(
regionName,
tableName,
(long) k,
System.currentTimeMillis(),
HConstants.DEFAULT_CLUSTER_ID);
WALEdit edit = new WALEdit();
edit.add(new KeyValue(rowkey, TEST_FAMILY, TEST_QUALIFIER, rowkey));
writer.append(new HLog.Entry(key, edit));
}
}
}
} finally {
writer.close();
}
}
@Override
protected void chore() {
try {
FileStatus[] files = this.fs.listStatus(this.oldLogDir);
int nbDeletedLog = 0;
FILE:
for (FileStatus file : files) {
Path filePath = file.getPath();
if (HLog.validateHLogFilename(filePath.getName())) {
for (LogCleanerDelegate logCleaner : logCleanersChain) {
if (!logCleaner.isLogDeletable(filePath)) {
// this log is not deletable, continue to process next log file
continue FILE;
}
}
// delete this log file if it passes all the log cleaners
this.fs.delete(filePath, true);
nbDeletedLog++;
} else {
LOG.warn("Found a wrongly formated file: " + file.getPath().getName());
this.fs.delete(filePath, true);
nbDeletedLog++;
}
if (nbDeletedLog >= maxDeletedLogs) {
break;
}
}
} catch (IOException e) {
e = RemoteExceptionHandler.checkIOException(e);
LOG.warn("Error while cleaning the logs", e);
}
}
/*
* Verify that every logs in the table directory has just the specified table and regions.
*/
private void verifyRecoverEdits(
final Path tableDir, final byte[] tableName, final Map<byte[], byte[]> regionsMap)
throws IOException {
for (FileStatus regionStatus : FSUtils.listStatus(fs, tableDir)) {
assertTrue(regionStatus.getPath().getName().startsWith(Bytes.toString(tableName)));
Path regionEdits = HLog.getRegionDirRecoveredEditsDir(regionStatus.getPath());
byte[] regionName = Bytes.toBytes(regionStatus.getPath().getName());
assertFalse(regionsMap.containsKey(regionName));
for (FileStatus logStatus : FSUtils.listStatus(fs, regionEdits)) {
HLog.Reader reader = HLog.getReader(fs, logStatus.getPath(), conf);
try {
HLog.Entry entry;
while ((entry = reader.next()) != null) {
HLogKey key = entry.getKey();
assertArrayEquals(tableName, key.getTablename());
assertArrayEquals(regionName, key.getEncodedRegionName());
}
} finally {
reader.close();
}
}
}
}
void process() throws IOException {
try {
for (HRegionInfo[] regionsToMerge = next();
regionsToMerge != null;
regionsToMerge = next()) {
if (!merge(regionsToMerge)) {
return;
}
}
} finally {
try {
hlog.closeAndDelete();
} catch (IOException e) {
LOG.error(e);
}
}
}
@After
public void tearDown() throws IOException {
IOException ex = null;
try {
region.close();
} catch (IOException e) {
LOG.warn("Caught Exception", e);
ex = e;
}
try {
hlog.closeAndDelete();
} catch (IOException e) {
LOG.warn("Caught Exception", e);
ex = e;
}
if (ex != null) {
throw ex;
}
}
@After
public void tearDown() throws Exception {
HLog hlog = region.getLog();
region.close();
hlog.closeAndDelete();
}
public void splitLog(final List<ServerName> serverNames) throws IOException {
long splitTime = 0, splitLogSize = 0;
List<Path> logDirs = new ArrayList<Path>();
for(ServerName serverName: serverNames){
Path logDir = new Path(this.rootdir,
HLog.getHLogDirectoryName(serverName.toString()));
Path splitDir = logDir.suffix(HLog.SPLITTING_EXT);
// rename the directory so a rogue RS doesn't create more HLogs
if (fs.exists(logDir)) {
if (!this.fs.rename(logDir, splitDir)) {
throw new IOException("Failed fs.rename for log split: " + logDir);
}
logDir = splitDir;
LOG.debug("Renamed region directory: " + splitDir);
} else if (!fs.exists(splitDir)) {
LOG.info("Log dir for server " + serverName + " does not exist");
continue;
}
logDirs.add(splitDir);
}
if (logDirs.isEmpty()) {
LOG.info("No logs to split");
return;
}
if (distributedLogSplitting) {
splitLogManager.handleDeadWorkers(serverNames);
splitTime = EnvironmentEdgeManager.currentTimeMillis();
splitLogSize = splitLogManager.splitLogDistributed(logDirs);
splitTime = EnvironmentEdgeManager.currentTimeMillis() - splitTime;
} else {
for(Path logDir: logDirs){
// splitLogLock ensures that dead region servers' logs are processed
// one at a time
this.splitLogLock.lock();
try {
HLogSplitter splitter = HLogSplitter.createLogSplitter(
conf, rootdir, logDir, oldLogDir, this.fs);
try {
// If FS is in safe mode, just wait till out of it.
FSUtils.waitOnSafeMode(conf, conf.getInt(HConstants.THREAD_WAKE_FREQUENCY, 1000));
splitter.splitLog();
} catch (OrphanHLogAfterSplitException e) {
LOG.warn("Retrying splitting because of:", e);
//An HLogSplitter instance can only be used once. Get new instance.
splitter = HLogSplitter.createLogSplitter(conf, rootdir, logDir,
oldLogDir, this.fs);
splitter.splitLog();
}
splitTime = splitter.getTime();
splitLogSize = splitter.getSize();
} finally {
this.splitLogLock.unlock();
}
}
}
if (this.metrics != null) {
this.metrics.addSplit(splitTime, splitLogSize);
}
}
