[GitHub] sijie opened a new pull request #2585: [tests] Make BrokerClientIntegrationTest testing behavior deterministic

[GitBox <gi...@apache.org>]

sijie opened a new pull request #2585: [tests] Make BrokerClientIntegrationTest testing behavior deterministic
URL: https://github.com/apache/incubator-pulsar/pull/2585
 
 
   
   *Motivation*
   
   The test is flaky.
   
   ```
   2018-09-14\T\17:46:29.848 [ERROR] testUnsupportedBatchMessageConsumer(org.apache.pulsar.client.impl.BrokerClientIntegrationTest)  Time elapsed: 3.161 s  <<< FAILURE!
   java.lang.AssertionError: Received message my-message-5 did not match the expected message my-message-0 expected [my-message-0] but found [my-message-5]
           at org.testng.Assert.fail(Assert.java:96)
           at org.testng.Assert.failNotEquals(Assert.java:776)
           at org.testng.Assert.assertEqualsImpl(Assert.java:137)
           at org.testng.Assert.assertEquals(Assert.java:118)
           at org.apache.pulsar.client.api.ProducerConsumerBase.testMessageOrderAndDuplicates(ProducerConsumerBase.java:51)
           at org.apache.pulsar.client.impl.BrokerClientIntegrationTest.testUnsupportedBatchMessageConsumer(BrokerClientIntegrationTest.java:357)
           at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
           at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
           at java.lang.reflect.Method.invoke(Method.java:498)
           at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
           at org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:54)
           at org.testng.internal.InvokeMethodRunnable.run(InvokeMethodRunnable.java:44)
           at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
           at java.util.concurrent.FutureTask.run(FutureTask.java:266)
           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
           at java.lang.Thread.run(Thread.java:748)
   ```
   
   The problem is due to we used a `time` based batching policy in testing. There is no guarantee how messages can be batched, hence
   the ordering and duplication check can fail on shared subscription
   
   *Changes*
   
   Set batching delay to a very large value and make sure the messages are in one batch.
   
   

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