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Subject [GitHub] GJL opened a new pull request #6820: [BP-1.5][FLINK-10309][rest] Before shutting down cluster, wait for asynchronous operations
Date Thu, 11 Oct 2018 07:37:04 GMT
GJL opened a new pull request #6820: [BP-1.5][FLINK-10309][rest] Before shutting down cluster,
wait for asynchronous operations
URL: https://github.com/apache/flink/pull/6820
   ## What is the purpose of the change
   *Wait for the result of asynchronous operations to be served before shutting down the cluster.
 This is necessary for the _"cancel with savepoint"_ operation. If we do not wait for the
result to be accessed by the client, we may shutdown the cluster, and the client gets a `ConnectionException`.*
   cc: @zentol 
   ## Brief change log
     - *Before shutting down cluster, wait for asynchronous operations.*
     - *Log stacktrace if checkpoint cannot be ack'ed.*
   ## Verifying this change
   This change added tests and can be verified as follows:
     - *Added test to `RestServerEndpointITCase` to verify that handlers are closed first.*
     - *Added unit tests for `CompletedOperationCache`.*
     - *Verified the changes by submitting and cancelling with savepoint of a job in a loop.*
   ## Does this pull request potentially affect one of the following parts:
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes
/ **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: (**yes** / no / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   ## Documentation
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not

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