lhotari commented on issue #21287:
URL: https://github.com/apache/pulsar/issues/21287#issuecomment-1798430079

           
   Flaky-test: 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer
   Number of failures: 11
   
   org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest is 
flaky. The testAddRemoveConsumer test method fails sporadically.
   
   ```
   java.lang.AssertionError: expected object to not be null
        at org.testng.Assert.fail(Assert.java:110)
        at org.testng.Assert.assertNotNull(Assert.java:1483)
        at org.testng.Assert.assertNotNull(Assert.java:1467)
        at 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer(PersistentDispatcherFailoverConsumerTest.java:380)
   ```
   
   Usage tip: To enable automatic navigation to failure message, open the 
following links with CTRL/CMD-click.  
   [example failure 
2023-11-04T22:14:28.4440428Z](https://github.com/apache/pulsar/actions/runs/6757378234/job/18367879225#step:9:598)
  
   [example failure 
2023-11-03T22:48:36.2722672Z](https://github.com/apache/pulsar/actions/runs/6743720388/job/18353949572#step:9:676)
  
   [example failure 
2023-11-03T01:34:07.0048022Z](https://github.com/apache/pulsar/actions/runs/6740140656/job/18322783445#step:9:500)
  
   [example failure 
2023-11-02T11:52:27.8191887Z](https://github.com/apache/pulsar/actions/runs/6729660000/job/18297899093#step:9:508)
  
   
   
   <details>
   <summary>Full exception stacktrace</summary>
   <code><pre>
   java.lang.AssertionError: expected object to not be null
        at org.testng.Assert.fail(Assert.java:110)
        at org.testng.Assert.assertNotNull(Assert.java:1483)
        at org.testng.Assert.assertNotNull(Assert.java:1467)
        at 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer(PersistentDispatcherFailoverConsumerTest.java:380)
        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:840)
   
   </pre></code>
   </details>
   
   [example failure 
2023-11-02T06:24:37.9019343Z](https://github.com/apache/pulsar/actions/runs/6728946736/job/18289054129#step:9:892)
  
   [example failure 
2023-11-01T22:24:59.2165302Z](https://github.com/apache/pulsar/actions/runs/6725651293/job/18280483512#step:9:892)
  
   [example failure 
2023-11-01T19:48:30.9955372Z](https://github.com/apache/pulsar/actions/runs/6724242950/job/18276082837#step:9:892)
  
   [example failure 
2023-10-30T06:24:49.6468755Z](https://github.com/apache/pulsar/actions/runs/6688692331/job/18171839004#step:8:889)
  
   [example failure 
2023-10-30T05:40:12.4651414Z](https://github.com/apache/pulsar/actions/runs/6688692331/job/18171139255#step:8:889)
  
   
   
   <details>
   <summary>Full exception stacktrace</summary>
   <code><pre>
   java.lang.AssertionError: expected object to not be null
        at org.testng.Assert.fail(Assert.java:110)
        at org.testng.Assert.assertNotNull(Assert.java:1483)
        at org.testng.Assert.assertNotNull(Assert.java:1467)
        at 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer(PersistentDispatcherFailoverConsumerTest.java:380)
        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)
   
   </pre></code>
   </details>
   
   ```
   java.lang.AssertionError: expected object to not be null
        at org.testng.Assert.fail(Assert.java:110)
        at org.testng.Assert.assertNotNull(Assert.java:1483)
        at org.testng.Assert.assertNotNull(Assert.java:1467)
        at 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer(PersistentDispatcherFailoverConsumerTest.java:379)
   ```
   
   Usage tip: To enable automatic navigation to failure message, open the 
following links with CTRL/CMD-click.  
   [example failure 
2023-10-30T05:31:57.2389215Z](https://github.com/apache/pulsar/actions/runs/6688642116/job/18171006970#step:8:889)
  
   [example failure 
2023-10-29T09:11:53.7295314Z](https://github.com/apache/pulsar/actions/runs/6682361724/job/18157467319#step:8:889)
  
   
   
   <details>
   <summary>Full exception stacktrace</summary>
   <code><pre>
   java.lang.AssertionError: expected object to not be null
        at org.testng.Assert.fail(Assert.java:110)
        at org.testng.Assert.assertNotNull(Assert.java:1483)
        at org.testng.Assert.assertNotNull(Assert.java:1467)
        at 
org.apache.pulsar.broker.service.PersistentDispatcherFailoverConsumerTest.testAddRemoveConsumer(PersistentDispatcherFailoverConsumerTest.java:379)
        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)
   
   </pre></code>
   </details>
   
   


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