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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6029) Secondary NN fails to checkpoint after -rollingUpgrade prepare
Date Thu, 27 Feb 2014 22:01:21 GMT
Haohui Mai created HDFS-6029:

             Summary: 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
            Reporter: Haohui Mai
            Assignee: Jing Zhao

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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