hangc0276 commented on a change in pull request #11739:
URL: https://github.com/apache/pulsar/pull/11739#discussion_r698159643



##########
File path: 
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java
##########
@@ -1906,14 +1908,19 @@ public TopicStatsImpl getStats(boolean 
getPreciseBacklog, boolean subscriptionBa
         stats.lastOffloadSuccessTimeStamp = 
ledger.getLastOffloadedSuccessTimestamp();
         stats.lastOffloadFailureTimeStamp = 
ledger.getLastOffloadedFailureTimestamp();
         Optional<CompactorMXBean> mxBean = getCompactorMXBean();
-        stats.compaction.lastCompactionRemovedEventCount = mxBean.map(stat ->
-                stat.getLastCompactionRemovedEventCount(topic)).orElse(0L);
-        stats.compaction.lastCompactionSucceedTimestamp = mxBean.map(stat ->
-                stat.getLastCompactionSucceedTimestamp(topic)).orElse(0L);
-        stats.compaction.lastCompactionFailedTimestamp = mxBean.map(stat ->
-                stat.getLastCompactionFailedTimestamp(topic)).orElse(0L);
-        stats.compaction.lastCompactionDurationTimeInMills = mxBean.map(stat ->
-                stat.getLastCompactionDurationTimeInMills(topic)).orElse(0L);
+
+        stats.compaction.lastCompactionRemovedEventCount = 0L;
+        stats.compaction.lastCompactionSucceedTimestamp = 0L;
+        stats.compaction.lastCompactionFailedTimestamp = 0L;
+        stats.compaction.lastCompactionDurationTimeInMills = 0L;

Review comment:
       ```java
   stats.compaction.lastCompactionRemovedEventCount = 0L;
   stats.compaction.lastCompactionSucceedTimestamp = 0L;
   stats.compaction.lastCompactionFailedTimestamp = 0L;
   stats.compaction.lastCompactionDurationTimeInMills = 0L;
   ```
   replace with  `stats.compaction.reset(); ` ?




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