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From "rangjiaheng (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-6979) CLONE - MR task counters deserialized through RPC throws OutOfBoundsException if Counter enum class version not match
Date Tue, 10 Oct 2017 02:29:00 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

rangjiaheng resolved MAPREDUCE-6979.
------------------------------------
    Resolution: Duplicate

> CLONE - MR task counters deserialized through RPC throws OutOfBoundsException if Counter
enum class version not match
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6979
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6979
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mr-am, task
>    Affects Versions: 3.0.0-alpha4
>         Environment: NM1 TaskCounter.class old version; 
> NM2 TaskCounter.class new version (new Enumeration values appended); 
>            Reporter: rangjiaheng
>
> Environment:
> NM1 TaskCounter.class old version; 
> NM2 TaskCounter.class new version (new Enumeration values appended); 
> Result:
> When an MR app's AM running on NM1, and it's containers on NM2; the containers on NM2
will all failed, AM cause OutOfBoundsException;
> Reason:
> When app running, containers will report their counters to AM through RPC, while the
Container with new version TaskCounter.class will write more Counter values to RPC; however,
the AM with old version TaskCounter.class which can not read them correctly from RPC.



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