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From "Uma Maheswara Rao G (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5745) SequenceFileLogReader#getPos may get wrong length on DFS restart
Date Sat, 07 Apr 2012 02:31:19 GMT
SequenceFileLogReader#getPos may get wrong length on DFS restart
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                 Key: HBASE-5745
                 URL: https://issues.apache.org/jira/browse/HBASE-5745
             Project: HBase
          Issue Type: Bug
          Components: wal
    Affects Versions: 0.96.0
            Reporter: Uma Maheswara Rao G
            Assignee: Uma Maheswara Rao G
            Priority: Critical


This is actually a kind of integration bug from Hbase perspective.

Currently HDFS will count the partial block length as 0, if there are no locations found for
the partial block. This can happend opn DFS restart, before DNs completely reports to NN.

Explained the scenario in HDFS-3222. Actually this is a bug in HDFS. we may solve this in
latest versions.

So, whatever the versions Hbase using may have this bug. HMaster may not be able to replay
the complete edits if there is an Hmaster switch also at the same time.

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