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Posted to commits@hbase.apache.org by st...@apache.org on 2014/03/13 23:11:04 UTC
svn commit: r1577338 - in
/hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase:
executor/EventHandler.java master/handler/MetaServerShutdownHandler.java
Author: stack
Date: Thu Mar 13 22:11:04 2014
New Revision: 1577338
URL: http://svn.apache.org/r1577338
Log:
HBASE-10476 HBase Master log grows very fast after stopped hadoop (due to connection exception) (Demai Ni)
Modified:
hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java
Modified: hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
URL: http://svn.apache.org/viewvc/hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java?rev=1577338&r1=1577337&r2=1577338&view=diff
==============================================================================
--- hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java (original)
+++ hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java Thu Mar 13 22:11:04 2014
@@ -128,7 +128,7 @@ public abstract class EventHandler imple
process();
if (getListener() != null) getListener().afterProcess(this);
} catch(Throwable t) {
- LOG.error("Caught throwable while processing event " + eventType, t);
+ handleException(t);
} finally {
chunk.close();
}
@@ -217,4 +217,12 @@ public abstract class EventHandler imple
public String getInformativeName() {
return this.getClass().toString();
}
+
+ /**
+ * Event exception handler, may be overridden
+ * @param t Throwable object
+ */
+ protected void handleException(Throwable t) {
+ LOG.error("Caught throwable while processing event " + eventType, t);
+ }
}
Modified: hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java
URL: http://svn.apache.org/viewvc/hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java?rev=1577338&r1=1577337&r2=1577338&view=diff
==============================================================================
--- hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java (original)
+++ hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java Thu Mar 13 22:11:04 2014
@@ -32,14 +32,23 @@ import org.apache.hadoop.hbase.executor.
import org.apache.hadoop.hbase.master.AssignmentManager;
import org.apache.hadoop.hbase.master.DeadServer;
import org.apache.hadoop.hbase.master.MasterServices;
+import org.apache.hadoop.hbase.util.Threads;
import org.apache.zookeeper.KeeperException;
+import com.google.common.annotations.VisibleForTesting;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
/**
* Shutdown handler for the server hosting <code>hbase:meta</code>
*/
@InterfaceAudience.Private
public class MetaServerShutdownHandler extends ServerShutdownHandler {
private static final Log LOG = LogFactory.getLog(MetaServerShutdownHandler.class);
+ private AtomicInteger eventExceptionCount = new AtomicInteger(0);
+ @VisibleForTesting
+ static final int SHOW_STRACKTRACE_FREQUENCY = 100;
+
public MetaServerShutdownHandler(final Server server,
final MasterServices services,
final DeadServer deadServers, final ServerName serverName) {
@@ -114,8 +123,10 @@ public class MetaServerShutdownHandler e
this.deadServers.finish(serverName);
}
}
-
+
super.process();
+ // Clear this counter on successful handling.
+ this.eventExceptionCount.set(0);
}
@Override
@@ -194,4 +205,20 @@ public class MetaServerShutdownHandler e
}
return getClass().getSimpleName() + "-" + name + "-" + getSeqid();
}
-}
+
+ @Override
+ protected void handleException(Throwable t) {
+ int count = eventExceptionCount.getAndIncrement();
+ if (count < 0) count = eventExceptionCount.getAndSet(0);
+ if (count > SHOW_STRACKTRACE_FREQUENCY) { // Too frequent, let's slow reporting
+ Threads.sleep(1000);
+ }
+ if (count % SHOW_STRACKTRACE_FREQUENCY == 0) {
+ LOG.error("Caught " + eventType + ", count=" + this.eventExceptionCount, t);
+ } else {
+ LOG.error("Caught " + eventType + ", count=" + this.eventExceptionCount +
+ "; " + t.getMessage() + "; stack trace shows every " + SHOW_STRACKTRACE_FREQUENCY +
+ "th time.");
+ }
+ }
+}
\ No newline at end of file