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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4980) Null pointer exception in HBaseClient receiveResponse
Date Thu, 08 Dec 2011 06:33:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165026#comment-13165026
] 

Hadoop QA commented on HBASE-4980:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12506577/0002-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/473//console

This message is automatically generated.
                
> Null pointer exception in HBaseClient receiveResponse
> -----------------------------------------------------
>
>                 Key: HBASE-4980
>                 URL: https://issues.apache.org/jira/browse/HBASE-4980
>             Project: HBase
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.92.0
>            Reporter: Shrijeet Paliwal
>              Labels: newbie
>         Attachments: 0001-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch, 0002-HBASE-4980-Fix-NPE-in-HBaseClient-receiveResponse.patch
>
>
> Relevant Stack trace: 
> 2011-11-30 13:10:26,557 [IPC Client (47) connection to xx.xx.xx/172.22.4.68:60020 from
an unknown user] WARN  org.apache.hadoop.ipc.HBaseClient - Unexpected exception receiving
call responses
> java.lang.NullPointerException
> >-at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:583)
> >-at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:511)
> {code}
>   if (LOG.isDebugEnabled())
>           LOG.debug(getName() + " got value #" + id);
>         Call call = calls.remove(id);
>         // Read the flag byte
>         byte flag = in.readByte();
>         boolean isError = ResponseFlag.isError(flag);
>         if (ResponseFlag.isLength(flag)) {
>           // Currently length if present is unused.
>           in.readInt();
>         }
>         int state = in.readInt(); // Read the state.  Currently unused.
>         if (isError) {
>           //noinspection ThrowableInstanceNeverThrown
>           call.setException(new RemoteException( WritableUtils.readString(in),
>               WritableUtils.readString(in)));
>         } else {
> {code}
> This line {code}Call call = calls.remove(id);{code}  may return a null 'call'. It is
so because if you have rpc timeout enable, we proactively clean up other calls which have
expired their lifetime along with the call for which socket timeout exception happend.

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