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https://issues.apache.org/jira/browse/MAPREDUCE-4342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13296019#comment-13296019
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Mayank Bansal commented on MAPREDUCE-4342:
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Problem is DC maintains a Tree map based on the
Key => file path on hdfs + time + Tracker machine name
Value => actual path of cache on task tracker machine
If because of some reason actual path gets deleted from the machine ,
distributed cache thinks it still have the file and returns the inconsistent
results because of that user code fails.
It is a DC responsibility to provide the consistent result.
> Distributed Cache gives inconsistent result if cache files get deleted from
> task tracker
> -----------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4342
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4342
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.22.0, 1.0.3, trunk
> Reporter: Mayank Bansal
> Assignee: Mayank Bansal
> Attachments: MAPREDUCE-4342-22.patch
>
>
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