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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 Thu, 23 Jun 2016 19:28:16 GMT

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

Haibo Chen updated MAPREDUCE-6724:
----------------------------------
    Attachment: mapreduce6724.002.patch

Patch updated to fix checkstyle issues.

> 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
>
>
> 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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