rkhachatryan commented on a change in pull request #14943:
URL: https://github.com/apache/flink/pull/14943#discussion_r583609274
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/state/StateBackendLoader.java
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@@ -204,6 +222,11 @@ public static StateBackend
fromApplicationOrConfigOrDefault(
// (1) the application defined state backend has precedence
if (fromApplication != null) {
+
+ checkArgument(
+ !(fromApplication instanceof DelegateStateBackend),
+ "DelegateStateBackend can not be delegated!");
Review comment:
> Why not?
> Another concern: can we get DelegateStateBackend here after
deserialization?
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