zhuzhurk commented on a change in pull request #9860: [FLINK-14331][runtime]
Reset vertices right after they transition to terminated states
URL: https://github.com/apache/flink/pull/9860#discussion_r333971888
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/DefaultScheduler.java
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@@ -211,7 +215,8 @@ private Runnable restartTasks(final
Set<ExecutionVertexVersion> executionVertexV
}
private CompletableFuture<?> cancelExecutionVertex(final
ExecutionVertexID executionVertexId) {
- return
executionVertexOperations.cancel(getExecutionVertex(executionVertexId));
+ return
executionVertexOperations.cancel(getExecutionVertex(executionVertexId))
+ .whenComplete((Object ignored, Throwable t) ->
executionSlotAllocator.cancel(executionVertexId));
Review comment:
We cannot get the slot assignment from ExecutionSlotAllocator in scheduler.
Maybe we should do the check in
DefaultExecutionSlotAllocator#allocateSlotsFor(...) to ensure that the vertex
has no prior pending slot request?
I think this change can also be beneficial for DefaultExecutionSlotAllocator
so that it will not drop reference of an existing pending
SlotExecutionVertexAssignment, which will otherwise cause slot leaks.
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