ISSUE-19456: Flaky-test: MetadataStoreStatsTest.testMetadataStoreStats

[sijie]

Original Issue: apache#19456

---

Search before asking

• I searched in the issues and found nothing similar.

Example failure

https://github.com/michaeljmarshall/pulsar/actions/runs/4117926823/jobs/7110068497#step:11:1262

Exception stacktrace

   Error:  Tests run: 7, Failures: 1, Errors: 0, Skipped: 5, Time elapsed: 18.502 s <<< FAILURE! - in org.apache.pulsar.broker.stats.MetadataStoreStatsTest
  Error:  testMetadataStoreStats(org.apache.pulsar.broker.stats.MetadataStoreStatsTest)  Time elapsed: 0.735 s  <<< FAILURE!
  java.lang.AssertionError: 
  Assertion failed with metrics:

(omitted metrics)

    expected object to not be null
  	at org.testng.Assert.fail(Assert.java:110)
  	at org.testng.Assert.assertNotNull(Assert.java:1319)
  	at org.apache.pulsar.broker.stats.MetadataStoreStatsTest.testMetadataStoreStats(MetadataStoreStatsTest.java:113)
  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
  	at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:139)
  	at org.testng.internal.invokers.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:47)
  	at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:76)
  	at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
  	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
  	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
  	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
  	at java.base/java.lang.Thread.run(Thread.java:833)

Are you willing to submit a PR?

• I'm willing to submit a PR!