[jira] [Assigned] (SAMZA-1302) Improve Zookeeper error handling

["Shanthoosh Venkataraman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SAMZA-1302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shanthoosh Venkataraman reassigned SAMZA-1302:
----------------------------------------------

    Assignee: Shanthoosh Venkataraman

> Improve Zookeeper error handling 
> ---------------------------------
>
>                 Key: SAMZA-1302
>                 URL: https://issues.apache.org/jira/browse/SAMZA-1302
>             Project: Samza
>          Issue Type: Bug
>            Reporter: Shanthoosh Venkataraman
>            Assignee: Shanthoosh Venkataraman
>            Priority: Minor
>             Fix For: 0.14.0
>
>
> In samza standalone, Zookeeper is used for accomplishing the following.
> A) For storing and retrieving the job model.
> B) Leader election amongst available stream processors.
> C) Propagating job model expiry to stream processors.
> D) Barrier for job model version upgrade.
> ZooKeeper Exceptions from all of the above scenarios are not propagated back to LocalApplicationRunner.waitForFinish.
> Incase of exception, an application will wait indefinitely if it is not bubbled up correctly. 
> Potentially could cause stalled processors and duplicate stream processors.



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