[jira] [Created] (FLINK-37448) status.taskManager.replicas to show actual TaskManager count

["Robert Metzger (Jira)" <ji...@apache.org>]

Robert Metzger created FLINK-37448:
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             Summary: status.taskManager.replicas to show actual TaskManager count
                 Key: FLINK-37448
                 URL: https://issues.apache.org/jira/browse/FLINK-37448
             Project: Flink
          Issue Type: Improvement
          Components: Kubernetes Operator
            Reporter: Robert Metzger


According to the code and documentation, {{status.taskManager.replicas}} shows a calculated number of TaskManager replicas.

I've opened this ticket to discuss if it makes sense to show the actual TaskManager count instead.
We have that information already in the codebase: https://github.com/apache/flink-kubernetes-operator/blob/main/flink-kubernetes-operator/src/main/java/org/apache/flink/kubernetes/operator/service/AbstractFlinkService.java#L753
It shouldn't be too hard to expose that number as taskManager replicas in the status.

Would this qualify as a breaking change (because we are changing the semantics)?

The information in status.taskManager.replicas is not accurate when using standalone deployments with reactive mode -- in that case, the actual number of TaskManagers can change over time and is not determined by the config.



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