[jira] [Created] (HDFS-15308) TestReconstructStripedFile.testNNSendsErasureCodingTasks is flaky

["Toshihiko Uchida (Jira)" <ji...@apache.org>]

Toshihiko Uchida created HDFS-15308:
---------------------------------------

             Summary: TestReconstructStripedFile.testNNSendsErasureCodingTasks is flaky
                 Key: HDFS-15308
                 URL: https://issues.apache.org/jira/browse/HDFS-15308
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: erasure-coding
    Affects Versions: 3.3.0
            Reporter: Toshihiko Uchida


In HDFS-14353, TestReconstructStripedFile.testNNSendsErasureCodingTasks failed once due to pending reconstruction timeout as follows.
{code}
java.lang.AssertionError: Found 4 timeout pending reconstruction tasks
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.apache.hadoop.hdfs.TestReconstructStripedFile.testNNSendsErasureCodingTasks(TestReconstructStripedFile.java:502)
	at org.apache.hadoop.hdfs.TestReconstructStripedFile.testNNSendsErasureCodingTasks(TestReconstructStripedFile.java:458)
	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$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
{code}

The error occurred on the following assertion.
{code}
// Make sure that all pending reconstruction tasks can be processed.
while (ns.getPendingReconstructionBlocks() > 0) {
  long timeoutPending = ns.getNumTimedOutPendingReconstructions();
  assertTrue(String.format("Found %d timeout pending reconstruction tasks",
      timeoutPending), timeoutPending == 0);
  Thread.sleep(1000);
}
{code}

The failure could not be reproduced in the reporter's docker environment (start-build-environment.sh).




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