zentol commented on code in PR #22169:
URL: https://github.com/apache/flink/pull/22169#discussion_r1146013857
##########
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/adaptive/AdaptiveScheduler.java:
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@@ -730,15 +748,49 @@ public CompletableFuture<CoordinationResponse>
deliverCoordinationRequestToCoord
+ " does not exist")));
}
+ @Override
+ public JobResourceRequirements requestJobResourceRequirements() {
+ final JobResourceRequirements.Builder builder =
JobResourceRequirements.newBuilder();
+ for (JobInformation.VertexInformation vertex :
jobInformation.getVertices()) {
+ builder.setParallelismForJobVertex(vertex.getJobVertexID(), 1,
vertex.getParallelism());
+ }
+ return builder.build();
+ }
+
+ @Override
+ public void updateJobResourceRequirements(JobResourceRequirements
jobResourceRequirements) {
+ if (executionMode == SchedulerExecutionMode.REACTIVE) {
+ throw new UnsupportedOperationException(
+ "Cannot change the parallelism of a job running in
reactive mode.");
+ }
+ final Optional<VertexParallelismStore>
maybeUpdateVertexParallelismStore =
+ DefaultVertexParallelismStore.applyJobResourceRequirements(
+ jobInformation.getVertexParallelismStore(),
jobResourceRequirements);
+ if (maybeUpdateVertexParallelismStore.isPresent()) {
+ this.jobInformation =
+ new JobGraphJobInformation(jobGraph,
maybeUpdateVertexParallelismStore.get());
+ declareDesiredResources();
+ state.tryRun(
+ ResourceListener.class,
+ ResourceListener::onNewResourceRequirements,
+ "Current state does not react to desired parallelism
changes.");
Review Comment:
> nothing is (re)declared in declareDesiredResources() - that's fine (?)
Currently, yes. Once we extend the AdaptiveScheduler to support fine-grained
resource management this will change though.
> but we still want to proceed to onNewResourceRequirements check (?)
yes, so we potentially trigger a restart.
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