[fix] [broker] fix NPE when calculating a topic's backlogQuota #22203

Annotations

4 warnings

Summary: Tests in class org.apache.pulsar.proxy.server.ProxyStuckConnectionTest created 1 new threads. There are now 10 threads in total.

Summary: Tests in class org.apache.pulsar.proxy.server.ProxyIsAHttpProxyTest created 1 new threads. There are now 10 threads in total.

Summary: Tests in class org.apache.pulsar.proxy.server.ProxyDisableZeroCopyTest created 1050 new threads. There are now 1059 threads in total.

Summary: Tests in class org.apache.pulsar.proxy.server.ProxyTest created 1000 new threads. There are now 1009 threads in total.