[jira] [Created] (HBASE-20728) Failure and recovery of all RSes in a RSgroup requires master restart for region assignments

["Biju Nair (JIRA)" <ji...@apache.org>]

Biju Nair created HBASE-20728:
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             Summary: Failure and recovery of all RSes in a RSgroup requires master restart for region assignments
                 Key: HBASE-20728
                 URL: https://issues.apache.org/jira/browse/HBASE-20728
             Project: HBase
          Issue Type: Bug
          Components: master, rsgroup
            Reporter: Biju Nair


If all the RSes in a RSgroup hosting user tables fail and recover, master still looks for old RSes (with old timestamp in the RS identifier) to assign regions. i.e. Regions are left in transition making the tables in the RSGroup unavailable. User need to restart {{master}} or manually assign the regions to make the tables available. Steps to recreate the scenario in a local cluster
 - Add required properties to {{site.xml}} to enable {{rsgroup}} and start hbase
 - Bring up multiple region servers using {{local-regionservers.sh start}}
 - Create a {{rsgroup}} and move a subset of  {{regionservers}} to the group
 - Create a table, move it to the group and put some data
 - Stop the {{regionservers}} in the group and restart them
 - From the {{master UI}}, we can see that the region for the table in transition and the RS has the old timestamp.



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