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https://issues.apache.org/jira/browse/HADOOP-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485595
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Hadoop QA commented on HADOOP-1167:
-----------------------------------
Integrated in Hadoop-Nightly #42 (See
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/42/)
> InMemoryFileSystem uses synchronizedtMaps with maps that are locked anyways
> ---------------------------------------------------------------------------
>
> Key: HADOOP-1167
> URL: https://issues.apache.org/jira/browse/HADOOP-1167
> Project: Hadoop
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.12.2
> Reporter: Owen O'Malley
> Assigned To: Owen O'Malley
> Priority: Minor
> Fix For: 0.13.0
>
> Attachments: h1167.patch
>
>
> The InMemoryFileSystem uses synchronizedMaps and then guards each access to
> them by locking the FileSystem. There is also insufficient synchronization in
> create.
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