Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/750#discussion_r46174663
--- Diff:
flink-runtime/src/main/scala/org/apache/flink/runtime/messages/TaskControlMessages.scala
---
@@ -59,6 +59,15 @@ object TaskMessages {
extends TaskMessage with RequiresLeaderSessionID
/**
+ * Stops the task associated with [[attemptID]]. The result is sent back
to the sender as a
+ * [[TaskOperationResult]] message.
+ *
+ * @param attemptID The task's execution attempt ID.
+ */
+ case class StopTask(attemptID: ExecutionAttemptID)
+ extends TaskMessage
--- End diff --
This class should also extend `RequiresLeaderSessionID`.
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