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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6830) BlockInfo.addStorage fails when DN changes the storage for a block replica
Date Fri, 08 Aug 2014 21:15:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arpit Agarwal updated HDFS-6830:
--------------------------------

    Summary: BlockInfo.addStorage fails when DN changes the storage for a block replica  (was:
BlockInfo.addStorage fails when DN updates the storage for a block replica)

> BlockInfo.addStorage fails when DN changes the storage for a block replica
> --------------------------------------------------------------------------
>
>                 Key: HDFS-6830
>                 URL: https://issues.apache.org/jira/browse/HDFS-6830
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.5.0
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>         Attachments: HDFS-6830.01.patch, HDFS-6830.02.patch, HDFS-6830.03.patch, HDFS-6830.04.patch
>
>
> The call to {{removeStorageInfo}} is wrong because the block is still in the DatanodeStorage's
list of blocks and the callee does not expect it to be.
> {code}
>       } else {
>         // The block is on the DN but belongs to a different storage.
>         // Update our state.
>         removeStorage(getStorageInfo(idx));
>         added = false;      // Just updating storage. Return false.
>       }
> {code}
> It is a very unlikely code path to hit since storage updates usually occur via incremental
block reports.



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