Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/3227#discussion_r98268538
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java
---
@@ -947,11 +951,17 @@ public void run() {
keyedStateHandleBackend,
keyedStateHandleStream);
-
owner.getEnvironment().acknowledgeCheckpoint(checkpointMetaData, subtaskState);
+ if
(asyncCheckpointState.compareAndSet(CheckpointingOperation.AsynCheckpointState.RUNNING,
CheckpointingOperation.AsynCheckpointState.COMPLETED)) {
+
owner.getEnvironment().acknowledgeCheckpoint(checkpointMetaData, subtaskState);
--- End diff --
In order to harden it, I'll reset the state to `RUNNING` in the failure
case if it was `COMPLETED`. Then cleanup should properly work.
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