cadonna commented on code in PR #15698:
URL: https://github.com/apache/kafka/pull/15698#discussion_r1574708196


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/HeartbeatRequestManager.java:
##########
@@ -482,6 +484,14 @@ public long nextHeartbeatMs(final long currentTimeMs) {
             return heartbeatTimer.remainingMs();
         }
 
+        public void onFailedAttempt(final long currentTimeMs) {
+            // Expire timer to allow sending HB after a failure. After a 
failure, a next HB may be
+            // needed with backoff (ex. errors that lead to retries, like 
coordinator load error),
+            // or immediately (ex. errors that lead to rejoining, like fencing 
errors).
+            heartbeatTimer.update(heartbeatTimer.currentTimeMs() + 
heartbeatTimer.remainingMs());

Review Comment:
   Sorry, my previous comment is not correct. The `heartbeatTimer` is expired 
when you call `heartbeatTimer.reset(0)`.



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