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https://issues.apache.org/jira/browse/HBASE-4610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166048#comment-13166048
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nkeywal commented on HBASE-4610:
--------------------------------
There is a side effect: the mini cluster needs 4,5 seconds to start
{noformat}
2011-12-09 01:30:37,883 INFO [SplitLogWorker-localhost,39827,1323423035986]
regionserver.SplitLogWorker(140): SplitLogWorker localhost,39827,1323423035986
starting
2011-12-09 01:30:37,961 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,062 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,163 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,264 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,365 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,467 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,568 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,668 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,769 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,870 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:38,971 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,072 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,173 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,274 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,375 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,476 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,577 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,678 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,779 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,881 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:39,981 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,082 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,183 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,284 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,385 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,486 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,587 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,688 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,789 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,890 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:40,991 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,092 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,194 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,295 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,395 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,496 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,598 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,698 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,800 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:41,900 INFO [Master:0;localhost,35818,1323423035631]
master.ServerManager(557): Waiting on regionserver(s) count to settle;
currently=1
2011-12-09 01:30:49,048 INFO [pool-1-thread-1] hbase.HBaseTestingUtility(529):
Starting up minicluster with 1 master(s) and 2 regionserver(s) and 2 datanode(s)
{noformat}
I believe that we could set the number of
hbase.master.wait.on.regionservers.maxtostart to the exact number of region we
want to start. Would be nice not to have the first sleep as well.
> Port HBASE-3380 (Master failover can split logs of live servers) to 92/trunk
> (definitely bring in config params, decide if we need to do more to fix the
> bug)
> -------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-4610
> URL: https://issues.apache.org/jira/browse/HBASE-4610
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.94.0
> Reporter: Jonathan Gray
> Assignee: Jonathan Gray
> Fix For: 0.92.0, 0.94.0
>
> Attachments: 4610.txt
>
>
> Over in HBASE-3380 we were having some TestMasterFailover flakiness. We
> added some more config parameters to better control the master startup loop
> where it waits for RS to heartbeat in. We had thought at the time that 92
> would have a different solution but it is still relying on heartbeats to
> learn about RSs.
> For now, we should definitely bring these config params into 92/trunk.
> Otherwise this is an incompatible regression and adding these will also make
> things like what was just reported over in HBASE-4603 trivial to fix in an
> optimal way.
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