Need to retain DeadServers to ensure we don't allow previously expired RS
instances to rejoin cluster
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Key: HBASE-3282
URL: https://issues.apache.org/jira/browse/HBASE-3282
Project: HBase
Issue Type: Bug
Components: master
Affects Versions: 0.90.0
Reporter: Jonathan Gray
Assignee: Jonathan Gray
Fix For: 0.90.0, 0.92.0
Currently we clear a server from the deadserver set once we finish processing
it's shutdown. However, certain circumstances (network partitions, race
conditions) could lead to the RS not doing a check-in until after the shutdown
has been processed. As-is, this RS will now be let back in to the cluster
rather than rejected with YouAreDeadException.
We should hang on to the dead servers so we always reject them.
One concern is that the set will grow indefinitely. One recommendation by
stack is to use SoftReferences.
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