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https://issues.apache.org/jira/browse/FLINK-21008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17267793#comment-17267793
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Till Rohrmann commented on FLINK-21008:
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Is the problem that deregistering the application from K8s will trigger K8s to
send a SIGTERM to the JobManager process? I guess then this behaves a bit
differently from Yarn and needs to be changed. Is there a way to let the
process properly terminate but still deleting the K8s resource (e.g.
deployment)? Maybe we need to register a shutdown hook which waits on the
{{ClusterEntrypoint}} to have completed its shutdown.
> ClusterEntrypoint#shutDownAsync may not be fully executed
> ---------------------------------------------------------
>
> Key: FLINK-21008
> URL: https://issues.apache.org/jira/browse/FLINK-21008
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.11.3, 1.12.1
> Reporter: Yang Wang
> Priority: Major
> Fix For: 1.13.0
>
>
> Recently, in our internal use case for native K8s integration with K8s HA
> enabled, we found that the leader related ConfigMaps could be residual in
> some corner situations.
> After some investigations, I think it is possibly caused by the inappropriate
> shutdown process.
> In {{ClusterEntrypoint#shutDownAsync}}, we first call the
> {{closeClusterComponent}}, which also includes deregistering the Flink
> application from cluster management(e.g. Yarn, K8s). Then we call the
> {{stopClusterServices}} and {{cleanupDirectories}}. Imagine that the cluster
> management do the deregister very fast, the JobManager process receives
> SIGNAL 15 before or is being executing the {{stopClusterServices}} and
> {{cleanupDirectories}}. The jvm process will directly exit then. So the two
> methods may not be executed.
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