gaoran10 commented on code in PR #20649:
URL: https://github.com/apache/pulsar/pull/20649#discussion_r1250505265


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managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerImpl.java:
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@@ -2451,15 +2451,15 @@ private void trimConsumedLedgersInBackground() {
 
     @Override
     public void trimConsumedLedgersInBackground(CompletableFuture<?> promise) {
-        executor.execute(() -> internalTrimConsumedLedgers(promise));
+        scheduledExecutor.execute(() -> internalTrimConsumedLedgers(promise));
     }
 
     public void trimConsumedLedgersInBackground(boolean isTruncate, 
CompletableFuture<?> promise) {

Review Comment:
   Maybe we can resolve this busy thread problem first, because the 
synchronized symbol only affects one ManagedLedger object, but one bk main 
executor thread may handle a lot of trim tasks for different ManagedLedger 
objects.



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