Allan Yang created HBASE-20976:
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Summary: SCP can be scheduled multiple times for the same RS
Key: HBASE-20976
URL: https://issues.apache.org/jira/browse/HBASE-20976
Project: HBase
Issue Type: Sub-task
Affects Versions: 2.0.1, 2.1.0
Reporter: Allan Yang
Assignee: Allan Yang
SCP can be scheduled multiple times for the same RS:
1. a RS crashed, a SCP was submitted for it
2. before this SCP finish, the Master crashed
3. The new master will scan the meta table and find some region is still open
on a dead server
4. The new master submit a SCP for the dead server again
The two SCP for the same RS can even execute concurrently if without
HBASE-20846…
Provided a test case to reproduce this issue and a fix solution in the patch.
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