Andrew Purtell created HBASE-15617:
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Summary: Canary in regionserver mode might not enumerate all
regionservers
Key: HBASE-15617
URL: https://issues.apache.org/jira/browse/HBASE-15617
Project: HBase
Issue Type: Bug
Reporter: Andrew Purtell
Priority: Minor
When running in regionserver mode the Canary is expected to probe for service
health one time per regionserver during a probe interval.
Each time the canary chore fires, we create a RegionServerMonitor, which uses
filterRegionServerByName (via getAllRegionServerByName) to enumerate over all
table descriptors, find the locations for each table, then assemble the list of
regionservers to probe from this result. The list may not contain all live
regionservers, if there is a regionserver up but for some reason not serving
any regions. To ensure we have the complete list of live regionservers I think
it would be better to use Admin#getClusterStatus and enumerate the live server
list returned in the result.
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