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From "Lars Hofhansl (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3378) NullPointerException when decoding remote exception
Date Wed, 21 Mar 2012 17:59:41 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl updated HBASE-3378:
---------------------------------

    Fix Version/s:     (was: 0.94.0)
                   0.96.0

Moving out of 0.94.
                
> NullPointerException when decoding remote exception
> ---------------------------------------------------
>
>                 Key: HBASE-3378
>                 URL: https://issues.apache.org/jira/browse/HBASE-3378
>             Project: HBase
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.20.6
>            Reporter: Ted Yu
>             Fix For: 0.96.0
>
>
> We recently saw several occurrences of NPE. Here is one of them:
> {noformat}
> 2010-12-20 08:57:14,214 WARN org.apache.hadoop.mapred.TaskTracker: Error running child
> java.io.IOException: java.io.IOException: java.lang.NullPointerException
> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 	at org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:94)
> 	at org.apache.hadoop.hbase.client.HBaseAdmin.modifyTable(HBaseAdmin.java:887)
> 	at org.apache.hadoop.hbase.client.HBaseAdmin.modifyTable(HBaseAdmin.java:791)
> 	at org.apache.hadoop.hbase.client.HBaseAdmin.flush(HBaseAdmin.java:703)
> {noformat}
> In master server log, I only found:
> {noformat}
> 2010-12-20 16:57:19,357 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 15
on 60000, call modifyTable([B@5b591d0b, TABLE_FLUSH, null) from 10.202.114.157:2760: error:
java.io.IOException: java.lang.NullPointerException
> java.io.IOException: java.lang.NullPointerException
> 2010-12-20 16:57:19,357 WARN org.apache.hadoop.ipc.HBaseServer: IPC Server Responder,
call modifyTable([B@5b591d0b, TABLE_FLUSH, null) from 10.202.114.157:2760: output error
> 2010-12-20 16:57:19,357 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 17
on 60000, call modifyTable([B@3781ec07, TABLE_FLUSH, null) from 10.202.114.136:35448: error:
java.io.IOException: java.lang.NullPointerException
> java.io.IOException: java.lang.NullPointerException
> 2010-12-20 16:57:19,358 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 15
on 60000 caught: java.nio.channels.ClosedChannelException
>         at sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:126)
>         at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:324)
>         at org.apache.hadoop.hbase.ipc.HBaseServer.channelWrite(HBaseServer.java:1210)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Responder.processResponse(HBaseServer.java:698)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Responder.doRespond(HBaseServer.java:762)
>         at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1026)
> {noformat}
> RemoteExceptionHandler should be able to handle NPE.

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