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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8397) NPE thrown when IPC layer gets an EOF reading a response
Date Fri, 01 Jun 2012 12:47:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287363#comment-13287363
] 

Hadoop QA commented on HADOOP-8397:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12530541/HADOOP-8397.patch
  against trunk revision .

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

    +1 tests included.  The patch appears to include 1 new or modified test files.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1067//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1067//console

This message is automatically generated.
                
> NPE thrown when IPC layer gets an EOF reading a response
> --------------------------------------------------------
>
>                 Key: HADOOP-8397
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8397
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Todd Lipcon
>            Assignee: Vinay
>            Priority: Critical
>         Attachments: HADOOP-8397.patch
>
>
> When making a call on an IPC connection where the other end has shut down, I see the
following exception:
> Caused by: java.lang.NullPointerException
>         at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:852)
>         at org.apache.hadoop.ipc.Client$Connection.run(Client.java:781)
> from the lines:
> {code}
>         RpcResponseHeaderProto response = 
>             RpcResponseHeaderProto.parseDelimitedFrom(in);
>         int callId = response.getCallId();
> {code}
> This is because parseDelimitedFrom() returns null in the case that the next thing to
be read on the stream is an EOF.

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