gaoyunhaii commented on a change in pull request #14734:
URL: https://github.com/apache/flink/pull/14734#discussion_r567823301
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
##########
@@ -350,13 +340,15 @@ public CheckpointCoordinator(
this.minPauseBetweenCheckpoints,
this.pendingCheckpoints::size,
this.checkpointsCleaner::getNumberOfCheckpointsToClean);
+
this.cachedTasksById =
- new LinkedHashMap<ExecutionAttemptID,
ExecutionVertex>(tasksToWaitFor.length) {
+ new LinkedHashMap<ExecutionAttemptID, ExecutionVertex>(
+ attemptMappingProvider.getNumberOfTasks()) {
@Override
protected boolean removeEldestEntry(
Map.Entry<ExecutionAttemptID, ExecutionVertex>
eldest) {
- return size() >
CheckpointCoordinator.this.tasksToWaitFor.length;
+ return size() >
attemptMappingProvider.getNumberOfTasks();
Review comment:
Yes, since the incomplete tasks' metric is reported after its checkpoint
is declined, if new checkpoints occur and `tasksToWaitFor` changed between the
first checkpoint get declined and the metrics are reported, some tasks might be
missed from the cache. Thus it would be better to always consider all the
tasks.
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