rkhachatryan commented on a change in pull request #12670: URL: https://github.com/apache/flink/pull/12670#discussion_r441346798
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
##########
@@ -538,51 +542,61 @@ private void
startTriggeringCheckpoint(CheckpointTriggerRequest request) {
coordinatorsToCheckpoint, pendingCheckpoint, timer),
timer);
- FutureUtils.assertNoException(
- CompletableFuture.allOf(masterStatesComplete,
coordinatorCheckpointsComplete)
- .handleAsync(
- (ignored, throwable) -> {
- final PendingCheckpoint
checkpoint =
-
FutureUtils.getWithoutException(pendingCheckpointCompletableFuture);
-
-
Preconditions.checkState(
- checkpoint !=
null || throwable != null,
- "Either the
pending checkpoint needs to be created or an error must have been occurred.");
-
- if (throwable != null) {
- // the
initialization might not be finished yet
- if (checkpoint
== null) {
-
onTriggerFailure(request, throwable);
- } else {
-
onTriggerFailure(checkpoint, throwable);
- }
+ FutureUtils.waitForAll(asList(masterStatesComplete,
coordinatorCheckpointsComplete))
+ .handleAsync(
+ (ignored, throwable) -> {
+ final PendingCheckpoint
checkpoint =
+
FutureUtils.getWithoutException(pendingCheckpointCompletableFuture);
+
+ Preconditions.checkState(
+ checkpoint != null ||
throwable != null,
+ "Either the pending
checkpoint needs to be created or an error must have been occurred.");
+
+ if (throwable != null) {
+ // the initialization
might not be finished yet
+ if (checkpoint == null)
{
+
onTriggerFailure(request, throwable);
} else {
- if
(checkpoint.isDiscarded()) {
-
onTriggerFailure(
-
checkpoint,
-
new CheckpointException(
-
CheckpointFailureReason.TRIGGER_CHECKPOINT_FAILURE,
-
checkpoint.getFailureCause()));
- } else {
- // no
exception, no discarding, everything is OK
- final
long checkpointId = checkpoint.getCheckpointId();
-
snapshotTaskState(
-
timestamp,
-
checkpointId,
-
checkpoint.getCheckpointStorageLocation(),
-
request.props,
-
executions,
-
request.advanceToEndOfTime);
-
-
coordinatorsToCheckpoint.forEach((ctx) ->
ctx.afterSourceBarrierInjection(checkpointId));
-
-
onTriggerSuccess();
- }
+
onTriggerFailure(checkpoint, throwable);
}
+ } else {
+ if
(checkpoint.isDiscarded()) {
+
onTriggerFailure(
+
checkpoint,
+ new
CheckpointException(
+
CheckpointFailureReason.TRIGGER_CHECKPOINT_FAILURE,
+
checkpoint.getFailureCause()));
+ } else {
+ // no
exception, no discarding, everything is OK
+ final long
checkpointId = checkpoint.getCheckpointId();
+
snapshotTaskState(
+
timestamp,
+
checkpointId,
+
checkpoint.getCheckpointStorageLocation(),
+
request.props,
+
executions,
+
request.advanceToEndOfTime);
+
+
coordinatorsToCheckpoint.forEach((ctx) ->
ctx.afterSourceBarrierInjection(checkpointId));
+
+
onTriggerSuccess();
+ }
+ }
- return null;
- },
- timer));
+ return null;
+ },
+ timer)
+ .whenComplete((unused, error) -> {
+ if (error != null) {
+ if (!isShutdown()) {
+
failureManager.handleJobLevelCheckpointException(new
CheckpointException(EXCEPTION, error), Optional.empty());
+ } else if (error instanceof
RejectedExecutionException) {
Review comment:
> But once the CheckpointCoordinator is shut down, these exceptions
should no longer matter, at least not in terms of correctness of the job.
So we are talkiing about the case `isShutdown() == true` branch.
I agree about job correctness and in this case exceptions are only logged.
I think this can be helpful during troubleshooting or debugging.
> I don't really understand why this was not a problem before and now we
want to fine grained filter out exceptions, this does not seem like a straight
forward solution to me.
We didn't have this code in previous releases. `CheckpointCoordinator` was
heavily refactored this release (than partially reverted). During the
development, we did have problem recently and had to guess that there is an NPE.
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