[jira] Created: (HDFS-1378) Edit log replay should track and report file offsets in case of errors

["Todd Lipcon (JIRA)" <ji...@apache.org>]

Edit log replay should track and report file offsets in case of errors
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                 Key: HDFS-1378
                 URL: https://issues.apache.org/jira/browse/HDFS-1378
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 0.22.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


Occasionally there are bugs or operational mistakes that result in corrupt edit logs which I end up having to repair by hand. In these cases it would be very handy to have the error message also print out the file offsets of the last several edit log opcodes so it's easier to find the right place to edit in the OP_INVALID marker. We could also use this facility to provide a rough estimate of how far along edit log replay the NN is during startup (handy when a 2NN has died and replay takes a while)

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