ijuma commented on code in PR #12228:
URL: https://github.com/apache/kafka/pull/12228#discussion_r903236313


##########
clients/src/main/java/org/apache/kafka/common/network/Selector.java:
##########
@@ -809,6 +810,13 @@ private void maybeCloseOldestConnection(long 
currentTimeNanos) {
      * poll().
      */
     public void clearCompletedReceives() {
+        this.completedReceives.values().forEach(networkReceive -> {
+            try {
+                networkReceive.close();

Review Comment:
   Yes, that makes sense. I was unsure how we could have such a bad leak that 
had gone undetected. It makes sense that the Selector cannot be responsible for 
closing the network receive since it transfers the ownership to the caller of 
`poll`. Perhaps we can add a comment explaining this?



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