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From "Chen He (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2951) Block reported as corrupt while running multi threaded client program that performs write and read operation on a set of files
Date Tue, 22 Apr 2014 19:22:15 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chen He resolved HDFS-2951.
---------------------------

    Resolution: Later

> Block reported as corrupt while running multi threaded client program that performs write
and read operation on a set of files
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2951
>                 URL: https://issues.apache.org/jira/browse/HDFS-2951
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 0.23.0
>            Reporter: J.Andreina
>             Fix For: 0.24.0
>
>
> Block incorrectly detected as bad in the following scenario:
> Running multi threaded client program which performs write and read operation on a set
of files
> One block detected as bad by DN
> Multiple recoveries where triggered from the NN side(It was happening every 1 hr)
> After around 6 hrs the recovery was successful(Commitblocksynchronization successful
at NN side)
> At the DN side around the same time when Commitblocksynchronization happened one more
NN recovery call has come and this was subsequently failig as already the block was recovered
and the generation timestamp is updated.
> At the DN side block verification failed and the block was reported as bad.
> FSCk report is indicating that the block is corrupt



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