thetumbled commented on code in PR #22452:
URL: https://github.com/apache/pulsar/pull/22452#discussion_r1554949020


##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java:
##########
@@ -3942,9 +3942,13 @@ public void publishTxnMessage(TxnID txnID, ByteBuf 
headersAndPayload, PublishCon
     @Override
     public CompletableFuture<Void> endTxn(TxnID txnID, int txnAction, long 
lowWaterMark) {
         if (TxnAction.COMMIT_VALUE == txnAction) {
-            return transactionBuffer.commitTxn(txnID, lowWaterMark);
+            return transactionBuffer.commitTxn(txnID, lowWaterMark).thenRun(() 
-> {
+                lastDataMessagePublishedTimestamp = Clock.systemUTC().millis();
+            });
         } else if (TxnAction.ABORT_VALUE == txnAction) {
-            return transactionBuffer.abortTxn(txnID, lowWaterMark);
+            return transactionBuffer.abortTxn(txnID, lowWaterMark).thenRun(() 
-> {
+                lastDataMessagePublishedTimestamp = Clock.systemUTC().millis();

Review Comment:
   Do we need to guarantee strict correctess?



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