Jimmy Xiang created HBASE-11197:
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Summary: Region could remain unassigned if regionserver crashes
Key: HBASE-11197
URL: https://issues.apache.org/jira/browse/HBASE-11197
Project: HBase
Issue Type: Bug
Components: Region Assignment
Reporter: Jimmy Xiang
Assignee: Jimmy Xiang
When looking into test failure:
testVisibilityLabelsOnKillingOfRSContainingLabelsTable
and find this is what has happened:
1. try to assign a region a region server;
2. master creates a znode, and send an openRegion request to the rs;
3. rs gets the request and sends back a response, then crashed;
4. try to assign the region again with forceNewPlan = true;
5. since the region is in transition, master tries to close it and get region
server stopped exception;
6. master offlines the region and removes it from transition; but can't assign
the region since the dead server is not processed;
7. now SSH finally kicks in, tries to assign this region again;
8. SSH will fail to assign it since the znode is there already.
We should clean up the znode in force offline a region.
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