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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9257) TestAsyncProcess#testFailAndSuccess fails sometime due to a race condition
Date Sat, 17 Aug 2013 18:36:47 GMT
Jeffrey Zhong created HBASE-9257:
------------------------------------

             Summary: TestAsyncProcess#testFailAndSuccess fails sometime due to a race condition
                 Key: HBASE-9257
                 URL: https://issues.apache.org/jira/browse/HBASE-9257
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.95.2, 0.98.0
            Reporter: Jeffrey Zhong


The test failed in our test env with the following stack. The reason is that we use the following
pattern to check errors:

{code}
    while (!ap.hasError()) {
      Thread.sleep(1);
    }
    ...
    Assert.assertEquals(1, ap.getErrors().actions.size());

{code}

While in our product code, we set errors in different order
{code}
      ...
      this.hasError.set(true);
      errors.add(throwable, row, location);
      ...
{code}
Therefore, a client code may not get error actions when hasError is true due to thread scheduling.

{code}
Test Error Stack:

java.lang.AssertionError: expected:<1> but was:<0>
    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.hbase.client.TestAsyncProcess.testFailAndSuccess(TestAsyncProcess.java:308)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    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.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.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
{code}

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