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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4296) Spasm of JobClient failures on successful jobs every once in a while
Date Thu, 16 Oct 2008 18:23:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640252#action_12640252
] 

Devaraj Das commented on HADOOP-4296:
-------------------------------------

What Vinod means to say is that the JobClient could catch the exception if it happens. Instead
of printing the raw exception, an error msg can be displayed like "job not found" or something..
This is what he meant I believe.

> Spasm of JobClient failures on successful jobs every once in a while
> --------------------------------------------------------------------
>
>                 Key: HADOOP-4296
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4296
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.17.1
>            Reporter: Joydeep Sen Sarma
>            Assignee: dhruba borthakur
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: 4296_jt_delayretire.patch, 4296_jt_delayretire2.patch
>
>
> At very busy times - we get a wave of job client failures all at the same time. the failures
come when the job is about to complete. when we look at the job history files - the jobs are
actually complete. Here's the stack:
> 08/09/27 02:18:00 INFO mapred.JobClient:  map 100% reduce 98%
> 08/09/27 02:18:41 INFO mapred.JobClient:  map 100% reduce 99% 
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:993)
> 	at com.facebook.hive.common.columnSetLoader.main(columnSetLoader.java:535)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.util.RunJar.main(RunJar.java:155)

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