rmetzger commented on a change in pull request #14847:
URL: https://github.com/apache/flink/pull/14847#discussion_r581918367
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/SchedulerBase.java
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@@ -835,8 +840,21 @@ public void updateAccumulators(final AccumulatorSnapshot
accumulatorSnapshot) {
mainThreadExecutor);
}
- private void startCheckpointScheduler(final CheckpointCoordinator
checkpointCoordinator) {
+ @Override
+ public void stopCheckpointScheduler() {
+ Preconditions.checkState(
+ getCheckpointCoordinator() != null,
+ "Checkpointing cannot be stopped since it's not enabled.");
+ getCheckpointCoordinator().stopCheckpointScheduler();
+ }
+
+ @Override
+ public void startCheckpointScheduler() {
mainThreadExecutor.assertRunningInMainThread();
+ final CheckpointCoordinator checkpointCoordinator =
getCheckpointCoordinator();
+ Preconditions.checkState(
+ checkpointCoordinator != null,
+ "Checkpointing cannot be started since it's not enabled.");
Review comment:
The checkpoint scheduler can be null, in situation I consider valid:
scenario:
- job with no restarts configured
- savepoint creation fails
- result: the EG reaches a terminal state, and sets the checkpoint
coordinator to null. This precondition fails, killing the JobManager process.
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