add server status logging chore to ServerManager
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Key: HBASE-1414
URL: https://issues.apache.org/jira/browse/HBASE-1414
Project: Hadoop HBase
Issue Type: Improvement
Reporter: Andrew Purtell
Assignee: Andrew Purtell
Priority: Minor
Fix For: 0.20.0
Adds a small chore to master.ServerManager that logs the number of reporting
region servers, the number of region servers declared dead (and their
identity), and the average load. Uses the metaScanner period. Useful for those
that tail the master log to get a sense of system health, or are considering
writing Nagios monitors etc. which do the same.
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