poorbarcode commented on code in PR #24423:
URL: https://github.com/apache/pulsar/pull/24423#discussion_r2371395038


##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ServerCnx.java:
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@@ -438,11 +450,37 @@ public void channelInactive(ChannelHandlerContext ctx) 
throws Exception {
         }
     }
 
+    protected void checkRateLimit(BaseCommand cmd) {
+        if (cmd.getType() == BaseCommand.Type.PONG && cmd.getType() == 
BaseCommand.Type.PING) {
+            return;
+        }
+        if (requestRateLimiter.acquire(1) == 0 && !pausedDueToRateLimitation) {

Review Comment:
   > It doesn't look like this would be a no-op at the moment. I'd expect that 
the condition includes rateLimitingSecondsAfterResumeFromUnreadable > 0 &&
   
   It is unnecessary, the rate limiter will skip to limit requests if the 
configuration is less than `0`



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