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https://issues.apache.org/jira/browse/MAPREDUCE-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269903#comment-13269903
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Tom White commented on MAPREDUCE-4230:
--------------------------------------
The general pattern is to use a combination of intrinsic locks for updating
counters and the Writable readFields/write methods, and Java's weakly
consistent collections for views (e.g. iterators).
> Ensure framework counter group synchronization is correct for
> serialization/deserialization
> -------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4230
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4230
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Tom White
> Fix For: 2.0.0
>
>
> FrameworkCounterGroup and FileSystemCounterGroup may be susceptible to a race
> outlined in
> https://issues.apache.org/jira/browse/MAPREDUCE-4226?focusedCommentId=13269657&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13269657
> by Robert Joseph Evans.
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