Flaky-test: TestDefaultMessageFormatter.testFormatMessage

[coderzc]

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• I searched in the issues and found nothing similar.

Example failure

https://github.com/apache/pulsar/runs/7837504066?check_suite_focus=true

Exception stacktrace

Error:  testFormatMessage(org.apache.pulsar.testclient.TestDefaultMessageFormatter)  Time elapsed: 0.015 s  <<< FAILURE!
  java.lang.AssertionError: expected [true] but found [false]
  	at org.testng.Assert.fail(Assert.java:99)
  	at org.testng.Assert.failNotEquals(Assert.java:1037)
  	at org.testng.Assert.assertTrue(Assert.java:45)
  	at org.testng.Assert.assertTrue(Assert.java:55)
  	at org.apache.pulsar.testclient.TestDefaultMessageFormatter.testFormatMessage(TestDefaultMessageFormatter.java:67)
  	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.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
  	at org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:45)
  	at org.testng.internal.InvokeMethodRunnable.call(InvokeMethodRunnable.java:73)
  	at org.testng.internal.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!