curcur commented on a change in pull request #14943:
URL: https://github.com/apache/flink/pull/14943#discussion_r578903917
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/state/CheckpointStorageLoader.java
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@@ -162,14 +163,19 @@ public static CheckpointStorage load(
Preconditions.checkNotNull(classLoader, "classLoader");
Preconditions.checkNotNull(configuredStateBackend, "statebackend");
- if (configuredStateBackend instanceof CheckpointStorage) {
+ StateBackend rootStateBackend =
+ (configuredStateBackend instanceof DelegateStateBackend)
+ ? ((DelegateStateBackend)
configuredStateBackend).getDelegatedStateBackend()
+ : configuredStateBackend;
Review comment:
DelegateStateBackend (Abstract class) is added exactly for that purpose.
New delegating/proxying only needs to extends DelegateStateBackend, like
ChangelogStateBackend.
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