aljoscha commented on issue #10451: [FLINK-15086][client] Explictly close 
JobCluster in attach mode
URL: https://github.com/apache/flink/pull/10451#issuecomment-562496288
 
 
   I think for `executeAsync()` we should always execute the cluster in 
detached mode. This has the unfortunate consequence that the cluster might go 
down before the user can query anything, but I think this is ok for now. In the 
future, we can enhance the `JobClient`/`ClusterClient` to talk directly to YARN 
(or the underlying execution system), this way, we can still get the job status 
(and some results) after a per-job YARN cluster has shut down.

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