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Posted to hdfs-dev@hadoop.apache.org by "Haohui Mai (JIRA)" <ji...@apache.org> on 2014/02/28 02:13:19 UTC

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

Haohui Mai created HDFS-6032:
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             Summary: -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
    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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