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https://issues.apache.org/jira/browse/HADOOP-933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12467651
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Benjamin Reed commented on HADOOP-933:
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867 might be a better solution, but it is an enhancement. This is a bug. It
would be nice to fix the bug.
> Application defined InputSplits do not work
> -------------------------------------------
>
> Key: HADOOP-933
> URL: https://issues.apache.org/jira/browse/HADOOP-933
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.10.1
> Reporter: Benjamin Reed
> Fix For: 0.10.1
>
> Attachments: MapTask.patch
>
>
> If an application defines its own InputSplit, the task tracker chokes when it
> cannot deserialize the InputSplit when it deserializes MapTasks it receives
> from the JobTracker. This is because the TaskTracker does not resolve classes
> from the job jar file. The attached patch delays resolution of the InputSplit
> until it is running in the context of the child process where it can resolve
> the InputSplit class.
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