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https://issues.apache.org/jira/browse/HBASE-15441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15190208#comment-15190208
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stack commented on HBASE-15441:
-------------------------------
warmup says: "...It synchrnously opens the region and closes the region
bringing the most important pages in cache." What happens when you remove the
close?
Put a bit of doc on here: keepRegionEvents
> Fix WAL splitting when region has moved multiple times
> ------------------------------------------------------
>
> Key: HBASE-15441
> URL: https://issues.apache.org/jira/browse/HBASE-15441
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.1.0, 1.2.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Blocker
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-15441.patch
>
>
> Currently WAL splitting is broken when a region has been opened multiple
> times in recent minutes.
> Region open and region close write event markers to the wal. These markers
> should have the sequence id in them. However it is currently getting 1. That
> means that if a region has moved multiple times in the last few mins then
> multiple split log workers will try and create the recovered edits file for
> sequence id 1. One of the workers will fail and on failing they will delete
> the recovered edits. Causing all split wal attempts to fail.
> We need to:
> # make sure that close get the correct sequence id for open.
> # Filter all region events from recovered edits
> It appears that the close event with a sequence id of one is coming from
> region warm up.
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