Elek, Marton created HDDS-1682:
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Summary: TestEventWatcher.testMetrics is flaky
Key: HDDS-1682
URL: https://issues.apache.org/jira/browse/HDDS-1682
Project: Hadoop Distributed Data Store
Issue Type: Bug
Components: test
Reporter: Elek, Marton
Assignee: Elek, Marton
TestEventWatcher is intermittent. (Failed twice out of 44 executions).
Error is:
{code}
Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 7.764 s <<<
FAILURE! - in org.apache.hadoop.hdds.server.events.TestEventWatcher
testMetrics(org.apache.hadoop.hdds.server.events.TestEventWatcher) Time
elapsed: 2.384 s <<< FAILURE!
java.lang.AssertionError: expected:<2> but was:<3>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at org.junit.Assert.assertEquals(Assert.java:542)
at
org.apache.hadoop.hdds.server.events.TestEventWatcher.testMetrics(TestEventWatcher.java:197)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
at
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
at
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
{code}
In the test we do the following:
1. fire start-event1
2. fire start-event2
3. fire start-event3
4. fire end-event1
5. wait
Usually the event2 and event3 are timed out and event1 is completed but in case
of an accidental time between 3 and 4 (in fact between 1 and 4) the event1 also
can be timed out.
I improved the unit test and fixed the metrics calculation (completed message
should be incremented only if it's not yet timed out).
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