[ 
https://issues.apache.org/jira/browse/HBASE-19350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

stack updated HBASE-19350:
--------------------------
    Attachment: HBASE-19350.branch-1.v0.test.patch

Retry

> TestMetaWithReplicas is flaky in branch-1
> -----------------------------------------
>
>                 Key: HBASE-19350
>                 URL: https://issues.apache.org/jira/browse/HBASE-19350
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Chia-Ping Tsai
>            Assignee: Chia-Ping Tsai
>             Fix For: 1.4.0, 2.0.0-beta-1
>
>         Attachments: HBASE-19350.branch-1.v0.test.patch, 
> HBASE-19350.branch-1.v0.test.patch
>
>
> If the size of RegionsInTransition is zero, the list passed to 
> {{ClusterStatus}} will be null.
> {code:title=ClusterStatus.java}
>     Set<RegionState> rit = null;
>     if (!proto.getRegionsInTransitionList().isEmpty()) {
>       rit = new 
> HashSet<RegionState>(proto.getRegionsInTransitionList().size());
>       for (RegionInTransition region : proto.getRegionsInTransitionList()) {
>         RegionState value = RegionState.convert(region.getRegionState());
>         rit.add(value);
>       }
>     }
> {code}
> It causes NPE if someone try to do the for-each work. The HBaseFsckRepair is 
> a real-life example.
> {code:title=HBaseFsckRepair.java}
>         for (RegionState rs: 
> admin.getClusterStatus().getRegionsInTransition()) {
>           if (rs.getRegion().equals(region)) {
>             inTransition = true;
>             break;
>           }
>         }
> {code}
> branch-2/master don't have this issue as the list of RegionsInTransition 
> passed to {{ClusterStatus}} never be null.
> {code:title=ProtobufUtil.java}
>     List<RegionState> rit =
>       new ArrayList<>(proto.getRegionsInTransitionList().size());
>     for (RegionInTransition region : proto.getRegionsInTransitionList()) {
>       RegionState value = RegionState.convert(region.getRegionState());
>       rit.add(value);
> }
> {code}



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