Improve AssignmentManager.handleRegion so that it can process certain ZK state
in the case of RS offline
--------------------------------------------------------------------------------------------------------
Key: HBASE-4478
URL: https://issues.apache.org/jira/browse/HBASE-4478
Project: HBase
Issue Type: Bug
Reporter: Ming Ma
Assignee: Ming Ma
Currently AssignmentManager.handleRegion skips processing of ZK event change if
the RS is offline. It relies on TimeoutMonitor and ServerShutdownHandler to
process RIT.
// Verify this is a known server
if (!serverManager.isServerOnline(sn) &&
!this.master.getServerName().equals(sn)) {
LOG.warn("Attempted to handle region transition for server but " +
"server is not online: " + Bytes.toString(data.getRegionName()));
return;
}
For certain states like OPENED, OPENING, FAILED_OPEN, CLOSED, it can continue
the progressing even if the RS is offline.
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