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https://issues.apache.org/jira/browse/HBASE-5782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13255770#comment-13255770
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Lars Hofhansl commented on HBASE-5782:
--------------------------------------

Yep. It's crucial that syncTillHere is updated last.
The pendingWrites are appended strictly in order, so there is a very short race 
that might lead to sync be issued multiple time when only one was necessary (it 
seems the same race condition existed before).
So I think it is safe and low risk.

The question now is: Do this for 0.94 and then a more elaborate rewrite in 
trunk, or do a more risky rewrite for 0.94?

                
> 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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