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Posted to mapreduce-issues@hadoop.apache.org by "Tom White (JIRA)" <ji...@apache.org> on 2012/05/07 21:14:47 UTC
[jira] [Commented] (MAPREDUCE-4230) Ensure framework counter group
synchronization is correct for serialization/deserialization
[ https://issues.apache.org/jira/browse/MAPREDUCE-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269903#comment-13269903 ]
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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