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https://issues.apache.org/jira/browse/OOZIE-615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13733619#comment-13733619
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Rohini Palaniswamy commented on OOZIE-615:
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Will post code review comments on review board. 

Aside form that, we will need separate jiras for 
  - working with secure zookeeper and sasl acl setting. This prevents some one 
else from deleting the oozie related znodes. 
  - getting hcat integration and SLA notifications to work. Both have in-memory 
datastructures and HA will impact them.
  - Log streaming does not work with secure Oozie server. Mona found this when 
she was trying out HA.
                
> Support high availability for the Oozie service
> -----------------------------------------------
>
>                 Key: OOZIE-615
>                 URL: https://issues.apache.org/jira/browse/OOZIE-615
>             Project: Oozie
>          Issue Type: New Feature
>    Affects Versions: trunk
>            Reporter: Craig Peters
>            Assignee: Robert Kanter
>             Fix For: trunk
>
>         Attachments: OOZIE-615.patch, OOZIE-615.patch, OOZIE-615.patch, 
> OOZIE-615.patch, OOZIE-615.patch, OOZIE-615.patch, OozieHADesign.pdf, Oozie 
> HA Overview.pdf, zookeeper_yahoo_code.zip
>
>
> As Oozie becomes a critical component in the Hadoop ecosystem users needs 
> assured availability of the services provided by Oozie.  To support this need 
> Oozie should include a new feature to support high availability.  This 
> feature needs to take into consideration that Oozie provides RESTful APIs, 
> Java APIs, and a command line API that should all be insensitive to the 
> availability of any specific server or components.  At Yahoo! it is not 
> required that there be session fail-over from the client.  It is acceptable 
> for the client to reconnect if a session is lost as long as the state data 
> managed by the Oozie service is not lost.

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