pnowojski commented on a change in pull request #16905:
URL: https://github.com/apache/flink/pull/16905#discussion_r695787852
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/MultipleInputStreamTask.java
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@@ -244,6 +235,29 @@ protected void createInputProcessor(
return resultFuture;
}
+ private CompletableFuture<Boolean> triggerStopWithSavepointWithDrainAsync(
+ CheckpointMetaData checkpointMetaData, CheckpointOptions
checkpointOptions) {
+ mainMailboxExecutor.execute(
+ () -> {
+
setSynchronousSavepoint(checkpointMetaData.getCheckpointId(), true);
+ operatorChain.getSourceTaskInputs().forEach(s ->
s.getOperator().stop());
+ },
+ "stop chained Flip-27 source for stop-with-savepoint --drain");
+
+ CompletableFuture<Void> sourcesStopped =
+ FutureUtils.waitForAll(
+ operatorChain.getSourceTaskInputs().stream()
+ .map(s -> s.getOperator().getFinishedFuture())
+ .collect(Collectors.toList()));
Review comment:
Maybe it would be better to collect the futures inside the mailbox
action `mainMailboxExecutor.submit()`? And keep the previous signature of
`SourceOperator#stop()` returning `finished` future?
As it is we are here assuming `operatorChain.getSourceTaskInputs()` and
`s.getOperator().getFinishedFuture()` are thread safe, which I think they are
(because they are immutable), but it's not part of the guarantees.
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