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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6724) Unsafe conversion from long to int in MergeManagerImpl.unconditionalReserve()
Date Tue, 26 Jul 2016 23:40:20 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Haibo Chen updated MAPREDUCE-6724:
----------------------------------
    Attachment: mapreduce6724.007.patch

Uploading a patch as [~jira.shegalov] suggested instead of bloating the patch with refactoring.

> Unsafe conversion from long to int in MergeManagerImpl.unconditionalReserve()
> -----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6724
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6724
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: mapreduce6724.001.patch, mapreduce6724.002.patch, mapreduce6724.003.patch,
mapreduce6724.004.patch, mapreduce6724.005.patch, mapreduce6724.006.patch, mapreduce6724.007.patch
>
>
> When shuffle is done in memory, MergeManagerImpl converts the requested size to an int
to allocate an instance of InMemoryMapOutput. This results in an overflow if the requested
size is bigger than Integer.MAX_VALUE and eventually causes the reducer to fail.



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