[jira] [Commented] (HBASE-4442) Provide test script to do rolling restart of RSs, master and do verification

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-4442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13108069#comment-13108069 ] 

Andrew Purtell commented on HBASE-4442:
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Would be excellent if one can use the script pretty easily on on-demand clusters launched on public clouds by something like Whirr.

> Provide test script to do rolling restart of RSs, master and do verification
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-4442
>                 URL: https://issues.apache.org/jira/browse/HBASE-4442
>             Project: HBase
>          Issue Type: Improvement
>          Components: test
>            Reporter: Ming Ma
>            Assignee: Michael Weng
>
> We use a script that restart RS on a rolling fashion and found couple new issues in HBase in the area of server shutdown and region assignments. Running such test on a cluster will help to verify changes made in the area of server shutdown and regions assignment. The script could do the followings:
> 1. Based on the cluster config file, get the list of RSs and master server.
> 2. Restart RSs and Master periodically. The parameters like the sleep time between stop and start, the percentage of machines down at at given time, etc. should be configurable. 
> 3. Use hbck or other ways to verify the cluster is moving. There will be inconsistency at a given time when you have lots of regions in transition. So that is ok. Script should mark test failure only when things are moving, for example, .META. isn't online for > timeoutmonitor period.

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