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From "Hari Sekhon (JIRA)" <>
Subject [jira] [Created] (AMBARI-6706) Rolling restarts for HA Masters eg HDFS NameNodes
Date Fri, 01 Aug 2014 11:02:38 GMT
Hari Sekhon created AMBARI-6706:

             Summary: Rolling restarts for HA Masters eg HDFS NameNodes
                 Key: AMBARI-6706
             Project: Ambari
          Issue Type: Improvement
    Affects Versions: 1.6.1
         Environment: Hortonworks HDP 2.1 with Ambari 1.6.1
            Reporter: Hari Sekhon

Rolling restarts currently only work for slaves such as Datanodes in Web UI when doing Service
Actions -> Restart Datanodes. When doing a Restart All it doesn't give any option to do
a rolling restart across all components including masters.

I usually configure HDFS NameNode HA but this means that in Ambari there is downtime in reconfiguration
even with NN HA enabled since it doesn't do rolling restarts of the NameNodes in order to
keep the cluster up.

This is needed to actually make the service really HA including HA during routine maintenance
and reconfiguration. Maybe I could workaround to shut master components one by one manually
but would be nice if Ambari could support this directly.


Hari Sekhon

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