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From "John Novatnack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2389) Spurious EOFExceptions reading SpillRecord index files
Date Wed, 04 May 2011 19:26:03 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028905#comment-13028905
] 

John Novatnack commented on MAPREDUCE-2389:
-------------------------------------------

We are also seeing this exception with CDH3 (0.20.2+923.21-1~maverick-cdh3)

> Spurious EOFExceptions reading SpillRecord index files
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-2389
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2389
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.22.0
>         Environment: Seen on RHEL 5.5, RHEL 6.0, local dirs on ext3, Java 6u20 and 6u24
>            Reporter: Todd Lipcon
>            Priority: Critical
>         Attachments: stap-output.txt
>
>
> In large jobs, I see around 1 shuffle fetch out of every million fetches fail with an
EOFException reading the SpillRecord index file. After lots of investigation, including systemtap,
it looks like the read() syscall is actually returning a premature "0" result for no reason,
so this is likely a kernel or filesystem bug which is exacerbated by some workload the TT
does.

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