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Posted to common-dev@hadoop.apache.org by "Milind Bhandarkar (JIRA)" <ji...@apache.org> on 2007/10/10 20:42:50 UTC
[jira] Commented: (HADOOP-1771) streaming hang when IOException in
MROutputThread. (NPE)
[ https://issues.apache.org/jira/browse/HADOOP-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533834 ]
Milind Bhandarkar commented on HADOOP-1771:
-------------------------------------------
The patch looks good. except that the try and catch statements (inside finally block) are not aligned.
> streaming hang when IOException in MROutputThread. (NPE)
> --------------------------------------------------------
>
> Key: HADOOP-1771
> URL: https://issues.apache.org/jira/browse/HADOOP-1771
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/streaming
> Affects Versions: 0.13.1
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Priority: Blocker
> Fix For: 0.15.0
>
> Attachments: h-1771-2.patch, h-1771-3.patch, h-1771.patch
>
>
> One streaming task hang and had stderr userlog as follows.
> {code}
> Exception in thread "Thread-5" java.lang.NullPointerException
> at java.lang.Throwable.printStackTrace(Throwable.java:460)
> at org.apache.hadoop.streaming.PipeMapRed$MROutputThread.run(PipeMapRed.java:352)
> {code}
> In PipeMapRed.java
> {code}
> 351 } catch (IOException io) {
> 352 io.printStackTrace(log_);
> 353 outerrThreadsThrowable = io;
> {code}
> I guess log_ is Null... Should call logStackTrace.
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