tillrohrmann commented on a change in pull request #7118: [FLINK-10482] Fix
double counting of checkpoint stat
URL: https://github.com/apache/flink/pull/7118#discussion_r238715678
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
##########
@@ -1195,11 +1196,16 @@ public void stopCheckpointScheduler() {
currentPeriodicTrigger = null;
}
- for (PendingCheckpoint p : pendingCheckpoints.values())
{
+ // take a snapshot of pendingCheckpoints to clear them
and prevent aborting them twice
+ // in case of subsequent call of
stopCheckpointScheduler()
+ List<PendingCheckpoint> pendingCheckpointsSnapshot =
+ new ArrayList<>(pendingCheckpoints.values());
+ pendingCheckpoints.clear();
+
+ for (PendingCheckpoint p : pendingCheckpointsSnapshot) {
Review comment:
Just as a note, I guess we could have solved the problem also by changing
`JobMaster.java:965-975` into a `handleAsync` part because the problem seems to
be that by aborting a `PendingCheckpoint` we fail the savepoint future which is
then directly triggers the execution of the `exceptionally` handler. By
decoupling the `exceptionally` handler from the `stopCheckpointScheduler` call,
there should not be any concurrency problem.
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