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From "Krisztian Horvath (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-15294) HBase RegionServer circular decommission
Date Fri, 11 Mar 2016 12:52:12 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-15294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Krisztian Horvath updated AMBARI-15294:
---------------------------------------
    Description: 
Provision a cluster with the attached blueprint with more than 2 hosts in the host_group_slave_1
host group. Put a few RegionServers to maintenance mode and try to decommission one of the
RSs. It will try to find valid targets to move the data to, but it includes RSs in maintenance
mode.
In case of larger number of decommission like 20, it leads to circular data movements as RSs
which are decommissioning will copy their data to other RSs which are also decommissioning.
In the log you can see the selected targets and 80% of them is in maintenance mode. 15 nodes
decommission 1 RS.


  was:
rovision a cluster with the attached blueprint with more than 2 hosts in the host_group_slave_1
host group. Put a few RegionServers to maintenance mode and try to decommission one of the
RSs. It will try to find valid targets to move the data to, but it includes RSs in maintenance
mode.
In case of larger number of decommission like 20, it leads to circular data movements as RSs
which are decommissioning will copy their data to other RSs which are also decommissioning.
In the log you can see the selected targets and 80% of them is in maintenance mode. 15 nodes
decommission 1 RS.



> HBase RegionServer circular decommission
> ----------------------------------------
>
>                 Key: AMBARI-15294
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15294
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.2.1
>            Reporter: Mahadev konar
>
> Provision a cluster with the attached blueprint with more than 2 hosts in the host_group_slave_1
host group. Put a few RegionServers to maintenance mode and try to decommission one of the
RSs. It will try to find valid targets to move the data to, but it includes RSs in maintenance
mode.
> In case of larger number of decommission like 20, it leads to circular data movements
as RSs which are decommissioning will copy their data to other RSs which are also decommissioning.
> In the log you can see the selected targets and 80% of them is in maintenance mode. 15
nodes decommission 1 RS.



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