[replication] RSM won't cleanup after locking if 0 peers
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Key: HBASE-2989
URL: https://issues.apache.org/jira/browse/HBASE-2989
Project: HBase
Issue Type: Bug
Reporter: Jean-Daniel Cryans
Assignee: Jean-Daniel Cryans
Priority: Minor
Fix For: 0.90.0
Small bug in ReplicationSourceManager, it won't cleanup after locking another's
RS znode if it didn't contain any queue at all. It happens in transferQueues():
{code}
LOG.info("Moving " + rsZnode + "'s hlogs to my queue");
SortedMap<String, SortedSet<String>> newQueues =
this.zkHelper.copyQueuesFromRS(rsZnode);
if (newQueues == null || newQueues.size() == 0) {
return;
}
this.zkHelper.deleteRsQueues(rsZnode);
{code}
That last line should be before the if, so that it deletes the lock znode and
the RS znode. Currently a lot of cruft piles up in ZK after a few restarts with
replication enabled and no queues, or in slave RSs.
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