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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-6029) Secondary NN fails to checkpoint after -rollingUpgrade prepare
Date Fri, 28 Feb 2014 01:23:23 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao resolved HDFS-6029.
-----------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed

I've committed this. Thanks for the test and review, Haohui!

> Secondary NN fails to checkpoint after -rollingUpgrade prepare
> --------------------------------------------------------------
>
>                 Key: HDFS-6029
>                 URL: https://issues.apache.org/jira/browse/HDFS-6029
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ha, hdfs-client, namenode
>    Affects Versions: HDFS-5535 (Rolling upgrades)
>            Reporter: Haohui Mai
>            Assignee: Jing Zhao
>         Attachments: HDFS-6029.000.patch
>
>
> If Secondary NN crashes right after calling {{dfsadmin -rollingUpgrade prepare}}, it
fails to checkpoint because it fails to download the newest fsimage whose name is {{fsimage_rollback_txid}}.
> To reproduce this bug:
> # Run NN and SNN.
> # Run {{dfsadmin -rollingUpgrade prepare}}.
> # Shutdown SNN, clear all fsimage created by SNN.
> # Restart SNN, SNN tries to download the {{fsimage_txid}} instead of {{fsimage_rollback_txid}},
resulting the failure.



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