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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1218) 20 append: Blocks recovered on startup should be treated with lower priority during block synchronization
Date Wed, 16 Jun 2010 21:58:24 GMT
20 append: Blocks recovered on startup should be treated with lower priority during block synchronization
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                 Key: HDFS-1218
                 URL: https://issues.apache.org/jira/browse/HDFS-1218
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node
    Affects Versions: 0.20-append
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical
             Fix For: 0.20-append


When a datanode experiences power loss, it can come back up with truncated replicas (due to
local FS journal replay). Those replicas should not be allowed to truncate the block during
block synchronization if there are other replicas from DNs that have _not_ restarted.

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