[fix] make sure the pendingAddOps.remove() and pendingAddOps.peek() p…

…rocess the same element

bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerHandle.java

@@ -1836,7 +1836,11 @@ void sendAddSuccessCallbacks() {
  return;
  }
 
- pendingAddOps.remove();
+ if (!pendingAddOps.remove(pendingAddOp)) {
+ // If the remove operation fails, it means the element has already been removed by another thread.
+ // We should continue to the next iteration to process the next element.
+ continue;
+ }
  explicitLacFlushPolicy.updatePiggyBackedLac(lastAddConfirmed);
  pendingAddsSequenceHead = pendingAddOp.entryId;
  if (!writeFlags.contains(WriteFlag.DEFERRED_SYNC)) {