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Posted to common-dev@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2007/09/15 05:00:32 UTC

[jira] Updated: (HADOOP-1904) ArrayIndexOutOfBoundException in BlocksMap

     [ https://issues.apache.org/jira/browse/HADOOP-1904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko updated HADOOP-1904:
----------------------------------------

    Attachment: RedundantAddBlock.patch

> ArrayIndexOutOfBoundException in BlocksMap
> ------------------------------------------
>
>                 Key: HADOOP-1904
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1904
>             Project: Hadoop
>          Issue Type: Bug
>    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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