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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1154) streaming hang. (PipeMapRed$MROutputThread gone)
Date Wed, 11 Apr 2007 21:21:32 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Cutting updated HADOOP-1154:
---------------------------------

    Status: Open  (was: Patch Available)

This patch fails to compile.

    [javac] src/contrib/streaming/src/java/org/apache/hadoop/streaming/PipeReducer.java:78:
cannot find symbol
    [javac] symbol  : constructor IOException(java.lang.String,java.lang.Throwable)
    [javac] location: class java.io.IOException
    [javac]             throw new IOException ("MROutput/MRErrThread failed",
    [javac]                   ^
 

> streaming hang. (PipeMapRed$MROutputThread gone)
> ------------------------------------------------
>
>                 Key: HADOOP-1154
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1154
>             Project: Hadoop
>          Issue Type: Bug
>          Components: contrib/streaming
>            Reporter: Koji Noguchi
>         Assigned To: Koji Noguchi
>         Attachments: 1154.patch, PipeReducer.jstack
>
>
> One streaming reducer ('cat')  hang, 
>  '/bin/cat' reducer waiting in 
>     0 S _____  24587 24557  0  75   0 -   631 pipe_w Mar22 ?        00:00:02 /bin/cat
> strace showed that it's waiting in write.
> $ strace -p 24587
> Process 24587 attached - interrupt to quit
> write(1, "________  "..., 138 <unfinished ...>
> Process 24587 detached
> When I looked at the jstack of ReduceTask process, I couldn't find the PipeMapRed$MROutputThread.

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