gaoran10 commented on a change in pull request #14656:
URL: https://github.com/apache/pulsar/pull/14656#discussion_r824465520
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File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java
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@@ -1051,10 +1051,12 @@ public void deleteCursorFailed(ManagedLedgerException
exception, Object ctx) {
void removeSubscription(String subscriptionName) {
PersistentSubscription sub = subscriptions.remove(subscriptionName);
- // preserve accumulative stats form removed subscription
- SubscriptionStatsImpl stats = sub.getStats(false, false, false);
- bytesOutFromRemovedSubscriptions.add(stats.bytesOutCounter);
- msgOutFromRemovedSubscriptions.add(stats.msgOutCounter);
+ if (sub != null) {
Review comment:
Maybe we could record the null sub by a warning log.
like this, just a demo code
```
if (sub == null) {
log.warn("The subscription {} for topic {} is not existing.",
subscriptionName, topic).
return;
}
```
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