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https://issues.apache.org/jira/browse/HADOOP-933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12471872
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Owen O'Malley commented on HADOOP-933:
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This patch also fixes HADOOP-338.
> 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
> Assigned To: Owen O'Malley
> Fix For: 0.12.0
>
> Attachments: client-split.patch, JobInProgress.patch, 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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