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Posted to dev@accumulo.apache.org by "Keith Turner (JIRA)" <ji...@apache.org> on 2012/05/29 20:36:24 UTC

[jira] [Resolved] (ACCUMULO-509) default walog copy/sort uses replication of 1

     [ https://issues.apache.org/jira/browse/ACCUMULO-509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keith Turner resolved ACCUMULO-509.
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 1.5.0
         Assignee: Keith Turner  (was: Eric Newton)
    
> default walog copy/sort uses replication of 1
> ---------------------------------------------
>
>                 Key: ACCUMULO-509
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-509
>             Project: Accumulo
>          Issue Type: Bug
>          Components: logger
>         Environment: medium size cluster
>            Reporter: Eric Newton
>            Assignee: Keith Turner
>            Priority: Minor
>             Fix For: 1.5.0, 1.4.1
>
>
> During recovery, the logger copied/sorted a recovery walog to hdfs.  The copy was ok, but there was a checksum error when replaying the data.  The system did not recover without manual intervention.  The work-around was to find the datanode serving the back block, and stop it.  Then I removed the bad recovery file and restarted the master.  The copy/sort took place again, and used a different datanode.  Recovery proceeded successfully.
> We need to use a higher replication and/or a more sophisticated approach to verifying and restarting recoveries.

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