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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5782) Edits can be appended out of seqid order since HBASE-4487
Date Tue, 17 Apr 2012 20:37:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13255911#comment-13255911
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Lars Hofhansl commented on HBASE-5782:
--------------------------------------

@Stack: the doneUpTo is fine, because it is only used to set syncedTillHere. We won't write
more into the log (once we take the pendingWrites they are gone), but we might sync too much
unnecessarily.
Will do the (performance) testing now. I don't have a cluster at my disposal atm, so I'll
do it with a local HDFS instance.

If we'd rather finish Todd's for 0.94 that'd be nice.

                
> Edits can be appended out of seqid order since HBASE-4487
> ---------------------------------------------------------
>
>                 Key: HBASE-5782
>                 URL: https://issues.apache.org/jira/browse/HBASE-5782
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Blocker
>             Fix For: 0.94.0
>
>         Attachments: 5782-lars-v2.txt, 5782-sketch.txt, 5782.txt, 5782.unfinished-stack.txt,
HBASE-5782.patch, hbase-5782.txt
>
>
> Create a table with 1000 splits, after the region assignemnt, kill the regionserver wich
contains META table.
> Here few regions are missing after the log splitting and region assigment. HBCK report
shows multiple region holes are got created.
> Same scenario was verified mulitple times in 0.92.1, no issues.

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