[jira] [Created] (FLINK-21008) ClusterEntrypoint#shutDownAsync may not be fully executed

[Shang Yuanchun (Jira)]

Yang Wang created FLINK-21008:
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             Summary: 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
            Reporter: Yang Wang


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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