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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4288) java.lang.NullPointerException is observed in Jobtracker log while call heartbeat
Date Mon, 06 Oct 2008 15:19:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated HADOOP-4288:
-------------------------------

    Attachment: HADOOP-4288-v4.patch

Adding a patch that incorporates Hemanth's comments. 
bq. The code adds a debug LOG statement that could print a null value of the variable i in

+1.

bq. The test case does not seem to test that when job is removed, the associated structures
are correctly cleaned up
The internal structures are not visible in the test case. Since this issue is about getting
NPE when two jobs are submitted by the same user and one of them finishes, I have written
the test case just to check if {{assignTasks()}} works when expected. If {{assignTasks}} works
then I assume internal structures should be fine.

> java.lang.NullPointerException is observed in Jobtracker log while   call heartbeat
> -----------------------------------------------------------------------------------
>
>                 Key: HADOOP-4288
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4288
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>    Affects Versions: 0.19.0
>            Reporter: Karam Singh
>            Assignee: Amar Kamat
>            Priority: Blocker
>         Attachments: HADOOP-4288-v1.patch, HADOOP-4288-v2.patch, HADOOP-4288-v3.patch,
HADOOP-4288-v4.patch
>
>   Original Estimate: 0h
>  Remaining Estimate: 0h
>
> 2008-09-26 09:33:08,190 INFO org.apache.hadoop.ipc.Server: IPC Server handler 5 on 34441,
call heartbeat(org.apache.hadoop.mapred.TaskTrackerStatus@177a878, false, true, 100) from
<ipaddress:port>: error: java.io.IOException: java.lang.NullPointerException  
> is observed in Jobtracker log.

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