curcur commented on a change in pull request #14884:
URL: https://github.com/apache/flink/pull/14884#discussion_r583413058
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/state/heap/HeapRestoreOperation.java
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@@ -271,7 +271,9 @@ private void readStateHandleStateData(
// Check that restored key groups all belong to the backend.
Preconditions.checkState(
keyGroupRange.contains(keyGroupIndex),
- "The key group must belong to the backend.");
+ "Key group %s doesn't belong to this backend %s",
Review comment:
=> "Key group %s doesn't belong to this backend with key group range:
%s",
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