zhuzhurk commented on a change in pull request #9791: [FLINK-14248][runtime]
Let LazyFromSourcesSchedulingStrategy restart terminated tasks
URL: https://github.com/apache/flink/pull/9791#discussion_r330588245
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/strategy/LazyFromSourcesSchedulingStrategy.java
##########
@@ -78,19 +81,22 @@ public void startScheduling() {
deploymentOptions.put(schedulingVertex.getId(), option);
}
-
allocateSlotsAndDeployExecutionVertexIds(getAllVerticesFromTopology());
+ allocateSlotsAndDeployExecutionVertices(
+
getSchedulingExecutionVertices(getAllVerticesFromTopology()),
+ IS_IN_CREATED_STATE);
}
@Override
- public void restartTasks(Set<ExecutionVertexID> verticesToRestart) {
+ public void restartTasks(final Set<ExecutionVertexID>
verticesToRestart) {
+ final Set<SchedulingExecutionVertex> verticesToSchedule =
getSchedulingExecutionVertices(verticesToRestart);
+
// increase counter of the dataset first
- verticesToRestart
+ verticesToSchedule
.stream()
- .map(schedulingTopology::getVertexOrThrow)
.flatMap(vertex ->
vertex.getProducedResultPartitions().stream())
.forEach(inputConstraintChecker::resetSchedulingResultPartition);
- allocateSlotsAndDeployExecutionVertexIds(verticesToRestart);
+ allocateSlotsAndDeployExecutionVertices(verticesToSchedule,
IS_IN_TERMINAL_STATE);
Review comment:
I see your concerns.
I'd also prefer to reset vertices before invoking `restartTasks()` on them.
And the contract can be simplified that the schedulingStrategy should only
schedule vertices which is in `CREATED` state.
Previously I thought we have made the decision to do lazy resetting. But now
I think it's reasonable to change this behaviour.
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