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HADOOP-1937 When the master times out a region server's lease, it is too aggressive in reclaiming the server's log. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk/src/contrib/hbase@582165 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jim Kellerman 2007-10-05 09:39:32 +00:00
parent 1acbfbde1f
commit 6e4efdf697
3 changed files with 81 additions and 52 deletions
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2
CHANGES.txt
View File

@ -66,6 +66,8 @@ Trunk (unreleased changes)
HADOOP-1975 HBase tests failing with java.lang.NumberFormatException
HADOOP-1990 Regression test instability affects nightly and patch builds
HADOOP-1996 TestHStoreFile fails on windows if run multiple times
HADOOP-1937 When the master times out a region server's lease, it is too
aggressive in reclaiming the server's log.
IMPROVEMENTS
HADOOP-1737 Make HColumnDescriptor data publically members settable

76
src/java/org/apache/hadoop/hbase/HMaster.java
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@ -35,6 +35,8 @@ import java.util.TimerTask;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Delayed;
import java.util.concurrent.DelayQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
@ -99,8 +101,10 @@ HMasterRegionInterface {
int numRetries;
long maxRegionOpenTime;
DelayQueue<PendingServerShutdown> shutdownQueue;
BlockingQueue<PendingOperation> msgQueue;
int leaseTimeout;
private Leases serverLeases;
private Server server;
private HServerAddress address;
@ -860,11 +864,12 @@ HMasterRegionInterface {
this.numRetries = conf.getInt("hbase.client.retries.number", 2);
this.maxRegionOpenTime =
conf.getLong("hbase.hbasemaster.maxregionopen", 30 * 1000);
this.shutdownQueue = new DelayQueue<PendingServerShutdown>();
this.msgQueue = new LinkedBlockingQueue<PendingOperation>();
this.serverLeases = new Leases(
conf.getInt("hbase.master.lease.period", 30 * 1000),
this.leaseTimeout = conf.getInt("hbase.master.lease.period", 30 * 1000);
this.serverLeases = new Leases(this.leaseTimeout,
conf.getInt("hbase.master.lease.thread.wakefrequency", 15 * 1000));
this.server = RPC.getServer(this, address.getBindAddress(),
@ -966,10 +971,13 @@ HMasterRegionInterface {
*/
try {
for (PendingOperation op = null; !closed.get(); ) {
try {
op = msgQueue.poll(threadWakeFrequency, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
// continue
op = shutdownQueue.poll();
if (op == null ) {
try {
op = msgQueue.poll(threadWakeFrequency, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
// continue
}
}
if (op == null || closed.get()) {
continue;
@ -1117,6 +1125,7 @@ HMasterRegionInterface {
* HMasterRegionInterface
*/
/** {@inheritDoc} */
@SuppressWarnings("unused")
public MapWritable regionServerStartup(HServerInfo serverInfo)
throws IOException {
@ -1140,11 +1149,7 @@ HMasterRegionInterface {
serversToServerInfo.notifyAll();
}
if (storedInfo != null && !closed.get()) {
try {
msgQueue.put(new PendingServerShutdown(storedInfo));
} catch (InterruptedException e) {
throw new RuntimeException("Putting into msgQueue was interrupted.", e);
}
shutdownQueue.put(new PendingServerShutdown(storedInfo));
}
// Either way, record the new server
@ -1683,9 +1688,12 @@ HMasterRegionInterface {
* The region server's log file needs to be split up for each region it was
* serving, and the regions need to get reassigned.
*/
private class PendingServerShutdown extends PendingOperation {
private class PendingServerShutdown extends PendingOperation
implements Delayed {
private long delay;
private HServerAddress deadServer;
private String deadServerName;
private Path oldLogDir;
private transient boolean logSplit;
private transient boolean rootChecked;
private transient boolean rootRescanned;
@ -1706,13 +1714,32 @@ HMasterRegionInterface {
PendingServerShutdown(HServerInfo serverInfo) {
super();
this.delay = leaseTimeout / 2;
this.deadServer = serverInfo.getServerAddress();
this.deadServerName = this.deadServer.toString();
this.logSplit = false;
this.rootChecked = false;
this.rootRescanned = false;
StringBuilder dirName = new StringBuilder("log_");
dirName.append(deadServer.getBindAddress());
dirName.append("_");
dirName.append(serverInfo.getStartCode());
dirName.append("_");
dirName.append(deadServer.getPort());
this.oldLogDir = new Path(dir, dirName.toString());
}
/** {@inheritDoc} */
public long getDelay(TimeUnit unit) {
return unit.convert(delay, TimeUnit.MILLISECONDS);
}
/** {@inheritDoc} */
public int compareTo(Delayed o) {
return Long.valueOf(getDelay(TimeUnit.MILLISECONDS)
- o.getDelay(TimeUnit.MILLISECONDS)).intValue();
}
/** {@inheritDoc} */
@Override
public String toString() {
@ -1875,17 +1902,12 @@ HMasterRegionInterface {
if (!logSplit) {
// Process the old log file
StringBuilder dirName = new StringBuilder("log_");
dirName.append(deadServer.getBindAddress());
dirName.append("_");
dirName.append(deadServer.getPort());
Path logdir = new Path(dir, dirName.toString());
if (fs.exists(logdir)) {
if (fs.exists(oldLogDir)) {
if (!splitLogLock.tryLock()) {
return false;
}
try {
HLog.splitLog(dir, logdir, fs, conf);
HLog.splitLog(dir, oldLogDir, fs, conf);
} finally {
splitLogLock.unlock();
}
@ -2901,16 +2923,8 @@ HMasterRegionInterface {
// NOTE: If the server was serving the root region, we cannot reassign it
// here because the new server will start serving the root region before
// the PendingServerShutdown operation has a chance to split the log file.
try {
if (info != null) {
msgQueue.put(new PendingServerShutdown(info));
}
} catch (InterruptedException e) {
// continue. We used to throw a RuntimeException here but on exit
// this put is often interrupted. For now, just log these iterrupts
// rather than throw an exception
LOG.debug("MsgQueue.put was interrupted (If we are exiting, this " +
"msg can be ignored)");
if (info != null) {
shutdownQueue.put(new PendingServerShutdown(info));
}
}
}

55
src/java/org/apache/hadoop/hbase/HRegionServer.java
View File

@ -96,7 +96,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
protected final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
private final Vector<HMsg> outboundMsgs = new Vector<HMsg>();
int numRetries;
final int numRetries;
protected final int threadWakeFrequency;
private final int msgInterval;
private final int serverLeaseTimeout;
@ -314,7 +314,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
}
}
}
// HLog and HLog roller. log is protected rather than private to avoid
// eclipse warning when accessed by inner classes
protected HLog log;
@ -472,19 +472,27 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
// get it when the master is panicing because for instance
// the HDFS has been yanked out from under it. Be wary of
// this message.
try {
if (checkFileSystem()) {
closeAllRegions();
restart = true;
if (checkFileSystem()) {
closeAllRegions();
synchronized (logRollerLock) {
try {
log.closeAndDelete();
serverInfo.setStartCode(rand.nextLong());
log = setupHLog();
} catch (IOException e) {
this.abortRequested = true;
this.stopRequested.set(true);
e = RemoteExceptionHandler.checkIOException(e);
LOG.fatal("error restarting server", e);
break;
}
}
} catch (Exception e) {
reportForDuty();
restart = true;
} else {
LOG.fatal("file system available check failed. " +
"Shutting down server.", e);
this.stopRequested.set(true);
this.fsOk = false;
this.abortRequested = true;
"Shutting down server.");
}
break;
case HMsg.MSG_REGIONSERVER_STOP:
@ -604,7 +612,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
* Run init. Sets up hlog and starts up all server threads.
* @param c Extra configuration.
*/
private void init(final MapWritable c) {
private void init(final MapWritable c) throws IOException {
try {
for (Map.Entry<Writable, Writable> e: c.entrySet()) {
String key = e.getKey().toString();
@ -618,18 +626,22 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
startServiceThreads();
} catch (IOException e) {
this.stopRequested.set(true);
LOG.fatal("Failed init",
RemoteExceptionHandler.checkIOException(e));
e = RemoteExceptionHandler.checkIOException(e);
LOG.fatal("Failed init", e);
IOException ex = new IOException("region server startup failed");
ex.initCause(e);
throw ex;
}
}
private HLog setupHLog()
throws RegionServerRunningException, IOException {
private HLog setupHLog() throws RegionServerRunningException,
IOException {
String rootDir = this.conf.get(HConstants.HBASE_DIR);
LOG.info("Root dir: " + rootDir);
Path logdir = new Path(new Path(rootDir),
"log" + "_" + getThisIP() + "_" +
this.serverInfo.getServerAddress().getPort());
Path logdir = new Path(new Path(rootDir), "log" + "_" + getThisIP() + "_" +
this.serverInfo.getStartCode() + "_" +
this.serverInfo.getServerAddress().getPort());
if (LOG.isDebugEnabled()) {
LOG.debug("Log dir " + logdir);
}
@ -762,6 +774,7 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
}
break;
} catch(IOException e) {
LOG.warn("error telling master we are up", e);
this.sleeper.sleep(lastMsg);
continue;
}
@ -1429,4 +1442,4 @@ public class HRegionServer implements HConstants, HRegionInterface, Runnable {
public static void main(String [] args) {
doMain(args, HRegionServer.class);
}
}
}