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https://issues.apache.org/jira/browse/HBASE-19752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16324797#comment-16324797
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Andrew Purtell commented on HBASE-19752:
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bq. Somehow I used a partial branch-1 patch on branch-1.4
... and didn't check if it even compiled. Never mind if the test passed.
> RSGroupBasedLoadBalancer#getMisplacedRegions() should handle the case where
> rs group cannot be determined
> ---------------------------------------------------------------------------------------------------------
>
> Key: HBASE-19752
> URL: https://issues.apache.org/jira/browse/HBASE-19752
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Fix For: 1.4.1, 1.5.0, 2.0.0-beta-1
>
> Attachments: 19752.v1.txt, 19752.v2.txt, 19752.v3.txt, 19752.v4.txt,
> 19752.v5.txt, 19752.v6.txt, 19752.v7.branch-1.txt, 19752.v7.txt
>
>
> Observed the following in rs group test output:
> {code}
> 2018-01-10 14:17:23,006 DEBUG [AssignmentThread]
> rsgroup.RSGroupBasedLoadBalancer(316): Found misplaced region:
> hbase:acl,,1515593841277.ecf47ecb7522d7fab40db0a237f973fd. on server:
> localhost,1,1 found in group: null outside of group: UNKNOWN
> {code}
> Here is corresponding code:
> {code}
> if (assignedServer != null &&
> (info == null ||
> !info.containsServer(assignedServer.getAddress()))) {
> RSGroupInfo otherInfo = null;
> otherInfo =
> rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());
> LOG.debug("Found misplaced region: " +
> regionInfo.getRegionNameAsString() +
> {code}
> As you can see, both info and otherInfo were null.
> In this case, the region should not be placed in misplacedRegions.
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