Author: jdcryans
Date: Fri Feb 17 19:56:54 2012
New Revision: 1245730
URL: http://svn.apache.org/viewvc?rev=1245730&view=rev
Log:
HBASE-4640 Catch ClosedChannelException and document it
Modified:
hbase/trunk/src/docbkx/troubleshooting.xml
hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java
Modified: hbase/trunk/src/docbkx/troubleshooting.xml
URL:
http://svn.apache.org/viewvc/hbase/trunk/src/docbkx/troubleshooting.xml?rev=1245730&r1=1245729&r2=1245730&view=diff
==============================================================================
--- hbase/trunk/src/docbkx/troubleshooting.xml (original)
+++ hbase/trunk/src/docbkx/troubleshooting.xml Fri Feb 17 19:56:54 2012
@@ -888,7 +888,7 @@ ERROR org.apache.hadoop.hbase.regionserv
as forward lookup. See <link
xlink:href="https://issues.apache.org/jira/browse/HBASE-3431";>HBASE 3431
RegionServer is not using the name given it by the master; double
entry in master listing of servers</link> for gorey details.
</para>
- </section>
+ </section>
<section xml:id="trouble.rs.runtime.codecmsgs">
<title>Logs flooded with '2011-01-10 12:40:48,407 INFO
org.apache.hadoop.io.compress.CodecPool: Got
brand-new compressor' messages</title>
@@ -898,6 +898,15 @@ ERROR org.apache.hadoop.hbase.regionserv
symlink them into place and the message should go away.
</para>
</section>
+ <section xml:id="trouble.rs.runtime.client_went_away">
+ <title>Server handler X on 60020 caught:
java.nio.channels.ClosedChannelException</title>
+ <para>
+ If you see this type of message it means that the region server was
trying to read/send data from/to a client but
+ it already went away. Typical causes for this are if the client was
killed (you see a storm of messages like this when a MapReduce
+ job is killed or fails) or if the client receives a
SocketTimeoutException. It's harmless, but you should consider digging in
+ a bit more if you aren't doing something to trigger them.
+ </para>
+ </section>
</section>
<section xml:id="trouble.rs.shutdown">
Modified: hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java
URL:
http://svn.apache.org/viewvc/hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java?rev=1245730&r1=1245729&r2=1245730&view=diff
==============================================================================
--- hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java
(original)
+++ hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HBaseServer.java Fri
Feb 17 19:56:54 2012
@@ -1378,6 +1378,11 @@ public abstract class HBaseServer implem
// rethrow if no handler
throw e;
}
+ } catch (ClosedChannelException cce) {
+ LOG.warn(getName() + " caught a ClosedChannelException, " +
+ "this means that the server was processing a " +
+ "request but the client went away. The error message was: " +
+ cce.getMessage());
} catch (Exception e) {
LOG.warn(getName() + " caught: " +
StringUtils.stringifyException(e));
