[jira] [Created] (FLINK-10948) Add option to write out termination message with application status

["Ufuk Celebi (JIRA)" <ji...@apache.org>]

Ufuk Celebi created FLINK-10948:
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             Summary: Add option to write out termination message with application status
                 Key: FLINK-10948
                 URL: https://issues.apache.org/jira/browse/FLINK-10948
             Project: Flink
          Issue Type: Improvement
          Components: Distributed Coordination
            Reporter: Ufuk Celebi
            Assignee: Ufuk Celebi


I propose to add an option to write out a termination message to a file that indicates the terminal application status. With the change proposed in FLINK-10743, we can't use the exit code to differentiate between cancelled and succeeded applications.

The motivating use case for both this ticket and FLINK-10743 are Flink job clusters ({{StandaloneJobClusterEntryPoint}}) with Kubernetes. The idea of the termination message comes from Kubernetes ([https://kubernetes.io/docs/tasks/debug-application-cluster/determine-reason-pod-failure/)]. 

With this in place a terminated Pod will report the final status as in:
{code:java}
state:
  terminated:
    exitCode: 0
    finishedAt: 2018-11-20T11:00:59Z
    message: CANCELED # <--- termination message
    reason: Completed
    startedAt: 2018-11-20T10:59:18Z
{code}

The implementation could be done in {{ClusterEntrypoint#runClusterEntrypoint(ClusterEntrypoint)}} which is used by all entry points to run Flink.




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