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Posted to hdfs-dev@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2014/02/28 02:27:24 UTC

[jira] [Resolved] (HDFS-6032) -rollingUpgrade query hits NPE after the NN restarts

     [ https://issues.apache.org/jira/browse/HDFS-6032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jing Zhao resolved HDFS-6032.
-----------------------------

    Resolution: Fixed

> -rollingUpgrade query hits NPE after the NN restarts
> ----------------------------------------------------
>
>                 Key: HDFS-6032
>                 URL: https://issues.apache.org/jira/browse/HDFS-6032
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ha, hdfs-client, namenode
>    Affects Versions: HDFS-5535 (Rolling upgrades)
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>         Attachments: HDFS-6032.000.patch
>
>
> {{NamenodeRpcServer#rollingUpgrade}} throws an NPE during query after the NN restarts. It complains that the BlockPoolId in {{RollingUpgradeInfo}} equals to {{null}}.
> Further investigation shows that the {{BlockPoolId}} remains uninitialized when {{FSImage#loadFSImage}} constructs the {{RollingUpgradeInfo}} object, leading to the NPE.



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