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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-5745) SequenceFileLogReader#getPos may get wrong length on DFS restart
Date Sat, 11 Apr 2015 01:29:12 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-5745.
-----------------------------------
    Resolution: Incomplete
      Assignee:     (was: Uma Maheswara Rao G)

> SequenceFileLogReader#getPos may get wrong length on DFS restart
> ----------------------------------------------------------------
>
>                 Key: HBASE-5745
>                 URL: https://issues.apache.org/jira/browse/HBASE-5745
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.95.2
>            Reporter: 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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