Bharath Kumarasubramanian created SAMZA-2609:
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Summary: 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
*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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