[jira] Commented: (HBASE-2414) Enhance test suite to be able to specify distributed scenarios

["Karthik Ranganathan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-2414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854283#action_12854283 ] 

Karthik Ranganathan commented on HBASE-2414:
--------------------------------------------

Something along the following lines would help accomplish this:

- In a version of the tests, the master and region server threads each have a method to receive a string representation of the task they have to carry out
- They use reflection and execute the call only when called by the external caller. That way we can "serialize" the distributed execution.


> Enhance test suite to be able to specify distributed scenarios
> --------------------------------------------------------------
>
>                 Key: HBASE-2414
>                 URL: https://issues.apache.org/jira/browse/HBASE-2414
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.20.3
>            Reporter: Karthik Ranganathan
>
> We keep finding good cases that are reasonably hard to test, yet the test suite does not encode these. 
> For example: 
> HBASE-2413 Master does not respect generation stamps, may result in meta getting permanently offlined
> HBASE-2312 Possible data loss when RS goes into GC pause while rolling HLog
> I am sure there are many more such "scenarios" we should put into the unit tests. 

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