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From "Masatake Iwasaki (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11499) Decommissioning stuck because of failing recovery
Date Thu, 09 Mar 2017 04:30:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15902463#comment-15902463
] 

Masatake Iwasaki commented on HDFS-11499:
-----------------------------------------

+1 on 05, will commit it shortly.

> Decommissioning stuck because of failing recovery
> -------------------------------------------------
>
>                 Key: HDFS-11499
>                 URL: https://issues.apache.org/jira/browse/HDFS-11499
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs, namenode
>    Affects Versions: 2.7.1, 2.7.2, 2.7.3, 3.0.0-alpha2
>            Reporter: Lukas Majercak
>            Assignee: Lukas Majercak
>              Labels: blockmanagement, decommission, recovery
>             Fix For: 3.0.0-alpha3
>
>         Attachments: HDFS-11499.02.patch, HDFS-11499.03.patch, HDFS-11499.04.patch, HDFS-11499.05.patch,
HDFS-11499.patch
>
>
> Block recovery will fail to finalize the file if the locations of the last, incomplete
block are being decommissioned. Vice versa, the decommissioning will be stuck, waiting for
the last block to be completed.
> {code:xml}
> org.apache.hadoop.ipc.RemoteException(java.lang.IllegalStateException): Failed to finalize
INodeFile testRecoveryFile since blocks[255] is non-complete, where blocks=[blk_1073741825_1001,
blk_1073741826_1002...
> {code}
> The fix is to count replicas on decommissioning nodes when completing last block in BlockManager.commitOrCompleteLastBlock,
as we know that the DecommissionManager will not decommission a node that has UC blocks.



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