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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6563) NameNode cannot save fsimage in certain circumstances when snapshots are in use
Date Thu, 19 Jun 2014 00:05:24 GMT
Aaron T. Myers created HDFS-6563:
------------------------------------

             Summary: NameNode cannot save fsimage in certain circumstances when snapshots
are in use
                 Key: HDFS-6563
                 URL: https://issues.apache.org/jira/browse/HDFS-6563
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode, snapshots
    Affects Versions: 2.4.0
            Reporter: Aaron T. Myers
            Assignee: Aaron T. Myers
            Priority: Critical


Checkpoints will start to fail and the NameNode will not be able to manually saveNamespace
if the following set of steps occurs:

# A zero-length file appears in a snapshot
# That file is later lengthened to include at least one block
# That file is subsequently deleted from the present file system but remains in the snapshot

More details in the first comment.



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