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https://issues.apache.org/jira/browse/HADOOP-1904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-1904:
-------------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
I just committed this. Thanks Konstantin.
> ArrayIndexOutOfBoundException in BlocksMap
> ------------------------------------------
>
> Key: HADOOP-1904
> URL: https://issues.apache.org/jira/browse/HADOOP-1904
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.15.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Priority: Blocker
> Fix For: 0.15.0
>
> Attachments: RedundantAddBlock.patch
>
>
> If the name-node receives a duplicate report of a written block from a
> data-node it does not insert
> the block into the block map but mistakenly inserts it into the list of
> blocks belonging to the data-node,
> placing it into the beginning of the list. Since the block is not removed
> from the list prior to the insertion,
> the list itself becomes corrupted.
> This patch fixes the problem. I also reorganized the add/removeNode and
> add/removeBlock methods
> in order to avoid similar bugs in the future.
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