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https://issues.apache.org/jira/browse/HBASE-4479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119347#comment-13119347
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ramkrishna.s.vasudevan commented on HBASE-4479:
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@Ted
Testcases are running now. Will submit the patch once done.
The fix is just a one line fix. Correct me if this will not be ok.
In assignAllUserRegions() just
{code}
List<ServerName> servers = serverManager.getOnlineServersList();
+ if(servers.size() == 0) return;
{code}
> TestMasterFailover failure in Hbase-0.92#17
> -------------------------------------------
>
> Key: HBASE-4479
> URL: https://issues.apache.org/jira/browse/HBASE-4479
> Project: HBase
> Issue Type: Bug
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Minor
>
> When the master restarted it was not able to get any servers online and the
> restart was a clean restart.
> Hence there were no regions to assign.
> Hence the retainAssignment tries to get one of the regions and uses
> RANDOM.getInt(size). Here size is 0.
> So ideally 0 is not accepted here. Hence we have got an exception making the
> master not to come up and the test case timeout.
> Though we need to see if really no regions was expected when the master came
> up, but this JIRA's intent is to deal such scenario where the size can be 0.
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