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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1888) WALog entries not properly deleted after recovery during upgrade 1.5 -> 1.6
Date Wed, 13 Nov 2013 16:39:23 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821501#comment-13821501
] 

ASF subversion and git services commented on ACCUMULO-1888:
-----------------------------------------------------------

Commit 0e63755d5e3a9e441bae51d2f28402a3768820dc in branch refs/heads/1.6.0-SNAPSHOT from [~ecn]
[ https://git-wip-us.apache.org/repos/asf?p=accumulo.git;h=0e63755 ]

ACCUMULO-1831 ACCUMULO-1888 use uuids to confirm WALog GC; remove WALog entries in the !METADATA
table with the correct mutation


> WALog entries not properly deleted after recovery during upgrade 1.5 -> 1.6
> ---------------------------------------------------------------------------
>
>                 Key: ACCUMULO-1888
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1888
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: tserver
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Blocker
>             Fix For: 1.6.0
>
>
> While investigating ACCUMULO-1831, I got close consistency check failures:
> {noformat}
> 2013-11-13 09:47:43,797 [tserver.Tablet] ERROR: Closed tablet 2;row_0000020000< has
walog entries in !METADATA [2;row_0000020000; da20ecd9-2e3d-4165-ae49-351b56178b2f (12)]
> {noformat}
> Examining the WALog for !METADATA updates to this tablet, I see the walog entry being
deleted:
> {noformat}
> MANY_MUTATIONS 4 5
> 1 mutations:
>   2;row_0000020000
>       file:hdfs://hostname:9000/accumulo/tables/2/t-0000003/F000008v.rf [system]:73 []
863869,20001
>       srv:time [system]:73 [] M0
>       last:141e12559a3ffc2 [system]:73 [] localhost:9997
>       log:127.0.0.1:9997/127.0.0.1+9997/da20ecd9-2e3d-4165-ae49-351b56178b2f [system]:73
[] <deleted>
>       log:127.0.0.1+9997/da20ecd9-2e3d-4165-ae49-351b56178b2f
>       log:localhost:9997/hdfs://hostname:9000/accumulo/wal/localhost+9997/48f53ae2-2b54-4309-88c7-003c723dcd0e
[system]:73 [] <deleted>
>       srv:flush [system]:73 [] 0
>       srv:lock [system]:73 [] tservers/localhost:9997/zlock-0000000000$141e12559a3ffc2
> {noformat}
> The metadata table contained the key:
> {noformat}
> 2;row_0000020000 log:127.0.0.1+9997/da20ecd9-2e3d-4165-ae49-351b56178b2f
> {noformat}
> But this key was used to remove it:
> {noformat}
> 2;row_0000020000 log:127.0.0.1:9997/127.0.0.1+9997/da20ecd9-2e3d-4165-ae49-351b56178b2f
> {noformat}



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