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Duo Zhang resolved HBASE-19831. ------------------------------- Fix Version/s: (was: 3.0.0-alpha-4) Resolution: Won't Fix Resolve as we do not want master to carry regions now. > Regions on the Master Redux > --------------------------- > > Key: HBASE-19831 > URL: https://issues.apache.org/jira/browse/HBASE-19831 > Project: HBase > Issue Type: Sub-task > Reporter: Michael Stack > Priority: Major > > HBASE-10569 made it so Master could host Regions. It was done a long time ago > (before hbase-1.0.0). This option was used in a few instances. > Come hbase-2.0.0, we've found that master-as-regionserver has problems. This > is an umbrella issue to address problems found. Meantime, > master-as-regionserver is broke. > In particular, the startup sequence needs redo – the bit where the Master > checks in as a RegionServer in time to be factored as a Server when the > balancer first runs. Then there is what to do about changing state in AMv2. > Region state is locked when changed. Currently it can involve an RPC to > hbase:meta. If problem contacting other Server, the lock on region state can > last a long time shutting out Master function. What should we do w/ backup > Masters? They should host regions too. And so on. -- This message was sent by Atlassian Jira (v8.20.10#820010)