masteryhx commented on code in PR #19679:
URL: https://github.com/apache/flink/pull/19679#discussion_r920730839
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flink-state-backends/flink-statebackend-changelog/src/main/java/org/apache/flink/state/changelog/ChangelogKeyedStateBackend.java:
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@@ -565,18 +568,44 @@ public <N, SV, SEV, S extends State, IS extends S> IS
createInternalState(
StateSnapshotTransformer.StateSnapshotTransformFactory<SEV>
snapshotTransformFactory)
throws Exception {
+ ChangelogState changelogState =
+ changelogStateFactory.getExistingState(
+ stateDesc.getName(), BackendStateType.KEY_VALUE);
+ if (changelogState == null) {
Review Comment:
I think it should also work even if the createInternalState is called
firstly because it will trigger the migration normally.
In this case, the upgrade method will be called when user access.
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