akalash commented on code in PR #21923:
URL: https://github.com/apache/flink/pull/21923#discussion_r1124556907
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flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java:
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@@ -733,8 +764,7 @@ void restoreInternal() throws Exception {
// needed
channelIOExecutor.shutdown();
- isRunning = true;
- isRestoring = false;
+ taskState.status = TaskState.Status.RUNNING;
Review Comment:
As I understand right now all transitions are correct. The only problem is
we can overwrite the final status with another final status which is incorrect
behaviour. To fix that, I agree we can use CAS to update TaskStateStatus and
allow only transitions described in javadoc.
I also don't think that we should get back to 4 flags since we already spend
a lot of time understanding which combinations of them are really possible and
it seems nobody knows for sure. So it is better to decrease these combinations
and I think the enum with clear transitions is good choice.
I still think that we should even get rid of `failing` flag since I feel we
can combine it with enum but I'm ok if we do it later
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