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https://issues.apache.org/jira/browse/HBASE-21102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16614372#comment-16614372
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ramkrishna.s.vasudevan commented on HBASE-21102:
------------------------------------------------
[~Apache9]
I already downloaded the artificats from the build and verified the logs. The
existing logs does not give much info. When I wanted to fix the flakiness
before I committed the patch I added intermediatory logs and only then found
that the randomAssignment() was having some issues. Since in my local cluster
the test passes consistently I would like to push in some Logs and then rerun
the tests. Probably in precommits. If pre-commit does not fail then let me push
those logs and then generate a build. But one question I have is will the
flakey test re run after the commit with Log msgs added is done?
> ServerCrashProcedure should select target server where no other replicas
> exist for the current region
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-21102
> URL: https://issues.apache.org/jira/browse/HBASE-21102
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Affects Versions: 3.0.0, 2.2.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Major
> Attachments: HBASE-21102_1.patch, HBASE-21102_2.patch,
> HBASE-21102_3.patch, HBASE-21102_4.patch, HBASE-21102_initial.patch
>
>
> Currently when a server with region replica crashes, when the target server
> is created for the replica region assignment there is no guarentee that a
> server is selected where there is no other replica for the current region
> getting assigned. It so happens that currently we do an assignment randomly
> and later the LB comes and identifies these cases and again does MOVE for
> such regions. It will be better if we can identify target servers at least
> minimally ensuring that replicas are not colocated.
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