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Posted to mapreduce-issues@hadoop.apache.org by "Tom White (JIRA)" <ji...@apache.org> on 2012/07/09 20:57:36 UTC

[jira] [Updated] (MAPREDUCE-4252) MR2 job never completes with 1 pending task

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tom White updated MAPREDUCE-4252:
---------------------------------

    Attachment: MAPREDUCE-4252.patch

Here's a new patch which implements Bikas' suggestion of not allowing task attempt failures override a previously successful task attempt. This passes the same unit test as before.

Siddharth - please open another JIRA for the case you described above.
                
> MR2 job never completes with 1 pending task
> -------------------------------------------
>
>                 Key: MAPREDUCE-4252
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4252
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.1
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-4252.patch, MAPREDUCE-4252.patch, MAPREDUCE-4252.patch, MapReduce.png
>
>
> This was found by ATM:
> bq. I ran a teragen with 1000 map tasks. Many task attempts failed, but after 999 of the tasks had completed, the job is now sitting forever with 1 task "pending".

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