regionserver crashed,and failover
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Key: HBASE-5075
URL: https://issues.apache.org/jira/browse/HBASE-5075
Project: HBase
Issue Type: Improvement
Components: monitoring, regionserver, replication, zookeeper
Affects Versions: 0.90.4
Reporter: 代志远
Fix For: 0.90.4
regionserver crashed,it is too long time to notify hmaster.when hmaster know
regionserver's shutdown,it is long time to fetch the hlog's lease.
hbase is a online db,availability is very important.
i have a idea to improve availability,mintor node to check regionserver's
pid.if this pid notexsits,i think the rs down,i will delete the znode,and force
close the hlog file.
so the period maybe 100ms.
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