fredia commented on code in PR #19448:
URL: https://github.com/apache/flink/pull/19448#discussion_r873445202
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flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/OperatorSubtaskState.java:
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@@ -227,6 +229,14 @@ private static void registerSharedState(
for (KeyedStateHandle stateHandle : stateHandles) {
if (stateHandle != null) {
stateHandle.registerSharedStates(sharedStateRegistry,
checkpointID);
+ // Registering state handle to the given sharedStateRegistry
serves two purposes:
+ // 1. let sharedStateRegistry be responsible for cleaning the
state handle,
+ // 2. update the status of the checkpoint in
sharedStateRegistry to which the state
+ // handle belongs
+ sharedStateRegistry.registerReference(
+ new
SharedStateRegistryKey(stateHandle.getStateHandleId().getKeyString()),
+ new StreamStateHandleWrapper(stateHandle),
Review Comment:
There are a few details to ask for your opinion:
● should we refactor `SharedStateRegistry` to not limit `StreamStateHandle`
to register(https://issues.apache.org/jira/browse/FLINK-25862) here?
● if yes, how should we deal with the multi-register case? For changelog
states, we would like to avoid `SharedStateRegistry` to discard
multi-registered identical changelog states(
https://issues.apache.org/jira/browse/FLINK-26101), which is different from
other state handles. In other words, we also need a wrapper with a different
#equals method for changelog.
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