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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-6031) NN running newer software rejects loading the fsimage during rolling upgrade.
Date Fri, 28 Feb 2014 19:36:24 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE resolved HDFS-6031.
------------------------------------------

       Resolution: Fixed
    Fix Version/s: HDFS-5535 (Rolling upgrades)
     Hadoop Flags: Reviewed

Thanks Haohui, for testing and reviewing the patch.

I have committed this.

> NN running newer software rejects loading the fsimage during rolling upgrade.
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-6031
>                 URL: https://issues.apache.org/jira/browse/HDFS-6031
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Haohui Mai
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: HDFS-5535 (Rolling upgrades)
>
>         Attachments: h6031_20140227.patch, h6031_20140227b.patch, h6031_20140227c.patch,
h6031_20140227d.patch, h6031_20140227e.patch
>
>
> During rolling upgrade, the standby NN that has a newer layout version will complain
about that the fsimage is too old, and require starting the NN using the {{-upgrade}} option:
> {noformat}
> File system image contains an old layout version -55. An upgrade to version -56 is required.
> {noformat}
> However, {{-upgrade}} is disabled during rolling upgrade, thus it is impossible to restart
the standby NN:
> {noformat}
> org.apache.hadoop.hdfs.protocol.RollingUpgradeException: Failed to upgrade namenode since
a rolling upgrade is already in progress. Existing rolling upgrade info:
> ...
> {noformat}



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