[jira] [Resolved] (HBASE-9085) Integration Tests fails because of bug in teardown phase where the cluster state is not being restored properly.

["Enis Soztutar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-9085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Enis Soztutar resolved HBASE-9085.
----------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed

I've committed this to 0.94,0.95 and trunk. Thanks for the patch gautam. 
                
> Integration Tests fails because of bug in teardown phase where the cluster state is not being restored properly.
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-9085
>                 URL: https://issues.apache.org/jira/browse/HBASE-9085
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.95.0, 0.94.9, 0.94.10
>            Reporter: gautam
>            Assignee: gautam
>             Fix For: 0.98.0, 0.95.2, 0.94.11
>
>         Attachments: HBASE-9085.patch._0.94, HBASE-9085.patch._0.95_or_trunk
>
>
> I was running the following test over a Distributed Cluster:
> bin/hbase org.apache.hadoop.hbase.IntegrationTestsDriver IntegrationTestDataIngestSlowDeterministic
> The IntegrationTestingUtility.restoreCluster() is called in the teardown phase of the test.
> For a distributed cluster, it ends up calling DistributedHBaseCluster.restoreClusterStatus, which does the task 
> of restoring the cluster back to original state.
> The restore steps done here, does not solve one specific case:
> When the initial HBase Master is currently down, and the current HBase Master is different from the initial one.
> You get into this flow:
>     //check whether current master has changed
>     if (!ServerName.isSameHostnameAndPort(initial.getMaster(), current.getMaster())) {
> 	.............
>     }
> In the above code path, the current backup masters are stopped, and the current active master is also stopped.
> At this point, for the aforementioned usecase, none of the Hbase Masters would be available, hence the subsequent
> attempts to do any operation over the cluster would fail, resulting in Test Failure.

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