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Posted to hdfs-dev@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2012/09/12 01:06:07 UTC

[jira] [Created] (HDFS-3922) 0.22 and 0.23 namenode throws away blocks under construction on restart

Kihwal Lee created HDFS-3922:
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             Summary: 0.22 and 0.23 namenode throws away blocks under construction on restart
                 Key: HDFS-3922
                 URL: https://issues.apache.org/jira/browse/HDFS-3922
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.20.203.0, 0.22.1
            Reporter: Kihwal Lee
            Assignee: Kihwal Lee
            Priority: Critical
             Fix For: 0.22.1, 0.23.4


When reading edits on startup, namenode may throw away blocks under construction. This is because the file inode is turned into a "under construction" one, but nothing is done to the last block. 

With append/hsync, this is not acceptable because it may drop sync'ed partial blocks.  In branch 2 and trunk, HDFS-1623 (HA) fixed this issue.

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