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https://issues.apache.org/jira/browse/HBASE-5782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13255344#comment-13255344
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stack commented on HBASE-5782:
------------------------------
@Ram Read over the HLog comments. Its got stuff on why we want sequenceids in
order and where we have dependency on their being ordered, at least they are
notes on how we used to think. I was wondering too about ordering today. If
we didn't have to have order, then it would make stuff like running a
regionserver with N WALs a bit easier, and we don't try to guarantee sequence
order when replicating. But I'm wary undoing order though without our giving
the issue a bunch of thought first (Your patch above makes me nervous).
On the patch, Todds' seems way superior to me. His is more radical, removing
what seems to be a confusing sequenceid double, and its more clear whats going
on.
Oh, and thanks to you fellas for finding this one. Its a good one.
> 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-sketch.txt, 5782.txt, 5782.unfinished-stack.txt,
> HBASE-5782.patch
>
>
> 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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