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Posted to dev@flink.apache.org by "Xintong Song (Jira)" <ji...@apache.org> on 2021/03/08 11:02:00 UTC

[jira] [Created] (FLINK-21667) Standby RM might remove resources from Kubernetes

Xintong Song created FLINK-21667:
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             Summary: Standby RM might remove resources from Kubernetes
                 Key: FLINK-21667
                 URL: https://issues.apache.org/jira/browse/FLINK-21667
             Project: Flink
          Issue Type: Bug
          Components: Deployment / Kubernetes
    Affects Versions: 1.12.2
            Reporter: Xintong Song
             Fix For: 1.13.0, 1.12.3


Currently, on initialization {{KubernetesResourceManagerDriver}} starts a watch for receiving pod events. It could happen that it starts to receive events before obtaining leadership. Consequently, a standby RM may remove terminated pods from Kubernetes during handling the events.

This is not very damaging atm, since the removed pods are already terminated anyway. However, it would still be good for a standby RM to strictly following the contract and make no modifications before obtaining leadership. We might consider to postpone starting of the watch to when the leadership is granted.



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