Guanghao Zhang created HBASE-23035:
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Summary: Retain region to the last RegionServer make the failover
slower
Key: HBASE-23035
URL: https://issues.apache.org/jira/browse/HBASE-23035
Project: HBase
Issue Type: Bug
Reporter: Guanghao Zhang
Now if one RS crashed, the regions will try to use the old location for the
region deploy. But one RS only have 3 threads to open region by default. If a
RS have hundreds of regions, the failover is very slower. Assign to same RS may
have good locality if the Datanode is deploied on same host. But slower
failover make the availability worse. And the locality is not big deal when
deploy HBase on cloud.
This was introduced by HBASE-18946.
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