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https://issues.apache.org/jira/browse/SAMZA-2609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharath Kumarasubramanian closed SAMZA-2609.
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> Data model changes to track lifecycle information of job coordinator
> --------------------------------------------------------------------
>
> Key: SAMZA-2609
> URL: https://issues.apache.org/jira/browse/SAMZA-2609
> Project: Samza
> Issue Type: New Feature
> Reporter: Bharath Kumarasubramanian
> Assignee: Bharath Kumarasubramanian
> Priority: Major
> Fix For: 1.7
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> *Goal*: Implement the data model changes needed to track the lifecycle of AM.
> *Description*: With AM HA, the new AM will regenerate job model, do job
> planning and rewrite configurations and may have to spin up containers. The
> new rewritten configurations, job model can change from the existing metadata
> on which the containers are running. In order to handle this change of
> metadata, we need a way to identify lifecycle of the AM and store some
> information on the previous snapshot of the metadata.
> *Changes*:
> # Epoch identifier of the AM attempt so that we can determine if the new
> attempt is part of the same lifecycle of AM or a new deployment lifecycle
> # Additional information on the job model, configuration (potentially subset
> of it) so that we can use this information to decide the course of action if
> current metadata changed in comparison with the previous snapshot.
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