liyafan82 commented on a change in pull request #8236: 
[FLINK-12289][flink-runtime]Fix bugs and typos in Memory manager
URL: https://github.com/apache/flink/pull/8236#discussion_r282827754
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/memory/MemoryManager.java
 ##########
 @@ -387,11 +387,11 @@ public void release(MemorySegment segment) {
         *
         * @param segments The segments to be released.
         * @throws NullPointerException Thrown, if the given collection is null.
-        * @throws IllegalArgumentException Thrown, id the segments are of an 
incompatible type.
+        * @throws IllegalArgumentException Thrown, if the segments are of an 
incompatible type.
         */
        public void release(Collection<MemorySegment> segments) {
                if (segments == null) {
-                       return;
+                       throw new NullPointerException();
 
 Review comment:
   @StephanEwen Sounds reasonable. I have revised the PR accordingly. Please 
take a look.

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