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https://issues.apache.org/jira/browse/HBASE-20881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16580581#comment-16580581
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Duo Zhang commented on HBASE-20881:
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And for TestDrainReplicationQueuesForStandBy, I think the problem is that, we
need to add a backoff when retrying closing a region. For now, if there is a
IOException we will add backoff, but if the target server is crashed and
restarted, and SCP has not been started yet, the CloseRegionProcedure will fail
immediately and we will schedule a new one also immediately, this will consume
all the CPUs on the test machine...
Let me fix it, and also add a UT to test the backoff.
> Introduce a region transition procedure to handle all the state transition
> for a region
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-20881
> URL: https://issues.apache.org/jira/browse/HBASE-20881
> Project: HBase
> Issue Type: Sub-task
> Components: amv2, proc-v2
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0, 2.2.0
>
> Attachments: HBASE-20881-v1.patch, HBASE-20881-v10.patch,
> HBASE-20881-v2.patch, HBASE-20881-v3.patch, HBASE-20881-v4.patch,
> HBASE-20881-v4.patch, HBASE-20881-v5.patch, HBASE-20881-v6.patch,
> HBASE-20881-v7.patch, HBASE-20881-v7.patch, HBASE-20881-v8.patch,
> HBASE-20881-v9.patch, HBASE-20881.patch
>
>
> Now have an AssignProcedure, an UnssignProcedure, and also a
> MoveRegionProcedure which schedules an AssignProcedure and an
> UnssignProcedure to move a region. This makes the logic a bit complicated, as
> MRP is not a RIT, so when SCP can not interrupt it directly...
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