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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8145) Fix the editlog corruption exposed by failed TestAddStripedBlocks
Date Fri, 17 Apr 2015 23:47:59 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-8145:
----------------------------
    Description: 
{{TestAddStripedBlocks}} failed with some editlog corruption. Did some debugging, I can see
at least two issues:
# DFSStripedOutputStream tries to send out an empty packet to close the block even if writing
0 bytes
# Because of the above, NN tries to close the file. This exposes another bug in {{BlockInfoStriped}},
which writes its data/parity block numbers into the close editlog but do not read them while
loading.

This jira aims to only fix #2 and HDFS-8166 is used for fixing #1.

  was:
{{TestAddStripedBlocks}} failed with some editlog corruption. Did some debugging, I can see
at least two issues:
# DFSStripedOutputStream tries to send out an empty packet to close the block even if writing
0 bytes
# Because of the above, NN tries to close the file. This exposes another bug in {{BlockInfoStriped}},
which writes its data/parity block numbers into the close editlog but do not read them while
loading.


> Fix the editlog corruption exposed by failed TestAddStripedBlocks
> -----------------------------------------------------------------
>
>                 Key: HDFS-8145
>                 URL: https://issues.apache.org/jira/browse/HDFS-8145
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-8145.000.patch, HDFS-8145.001.patch
>
>
> {{TestAddStripedBlocks}} failed with some editlog corruption. Did some debugging, I can
see at least two issues:
> # DFSStripedOutputStream tries to send out an empty packet to close the block even if
writing 0 bytes
> # Because of the above, NN tries to close the file. This exposes another bug in {{BlockInfoStriped}},
which writes its data/parity block numbers into the close editlog but do not read them while
loading.
> This jira aims to only fix #2 and HDFS-8166 is used for fixing #1.



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