zhijiangW commented on a change in pull request #11351: [FLINK-16404][runtime] 
Solve the potential deadlock problem when reducing exclusive buffers to zero
URL: https://github.com/apache/flink/pull/11351#discussion_r397646752
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
 ##########
 @@ -419,6 +442,17 @@ public int getAndResetUnannouncedCredit() {
                return unannouncedCredit.getAndSet(0);
        }
 
+       /**
+        * Unblocks this channel from exactly once checkpoint.
+        */
+       public void unblockChannel() {
 
 Review comment:
   This can be removed if removing states by 
https://github.com/apache/flink/pull/11351#discussion_r397610517

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