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https://issues.apache.org/jira/browse/APEXCORE-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16085875#comment-16085875
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Priyanka Gugale commented on APEXCORE-602:
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Testing covered:
1. Wrote unit tests
2. Simulated operator failure recursively where before redeploy on a operator 
is finished it fails again. This creates multiple deploy request in parallel 
for a operator but different containers. (Forced to throw exception on certain 
conditions).
3. Manually killed a operator and predecessor operator within very short 
duration to make same operators redeploy in multiple requests.
4. Random killing of operator/containers for testing.


> Provide a "group-id" in the event object so that events are grouped together 
> by a "root cause".
> -----------------------------------------------------------------------------------------------
>
>                 Key: APEXCORE-602
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-602
>             Project: Apache Apex Core
>          Issue Type: Improvement
>            Reporter: Sanjay M Pujare
>            Assignee: Priyanka Gugale
>             Fix For: 3.7.0
>
>
> Provide a "group-id" in the event object so that events are grouped together 
> by a "root cause". An example is a bunch of container restarts are related to 
> a single failure in the application but the current sequence of Stram events 
> doesn't make it obvious. The consumer of events is able to better 
> read/analyze the events because of the group-id and focus on the root-cause.



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