need to be able to rolling restart hbase
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Key: HBASE-1351
URL: https://issues.apache.org/jira/browse/HBASE-1351
Project: Hadoop HBase
Issue Type: Bug
Affects Versions: 0.20.0
Reporter: ryan rawson
Fix For: 0.20.0
Once a hbase install goes live, unless you can take the readers offline, you
cannot stop and start the cluster to issue config changes, and other
generalized changes.
We need to do a rolling restart. My own experiments confirmed that:
- Restarting a regionserver works, you lose access to those regions, but comes
back when that regionserver restarts moments later. Maybe there should be a
'reassign these regions because i am going to shut down' flag/code/command.
- Restarting .META. regionserver just does not work. The master becomes
confused. I have seen it reassign the .META. but not update -ROOT-, now no one
knows where it is, and the root/meta scanners in the master just get hung.
- Cant restart master yet, need multi-master election via ZK to make this
happen.
This is a combo bug/feature request.
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