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失败现象：
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.262 s - in org.xnio.nio.test.NioTcpChannelTestCase
[ 127s] [INFO] Running org.xnio.nio.test.MultiThreadedNioTcpChannelTestCase
[ 128s] [INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.443 s - in org.xnio.nio.test.MultiThreadedNioTcpChannelTestCase
[ 128s] [INFO] Running org.xnio.nio.test.XnioWorkerTestCase
[ 259s] [ERROR] Tests run: 27, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 131.837 s <<< FAILURE! - in org.xnio.nio.test.XnioWorkerTestCase
[ 259s] [ERROR] cancelAcceptTcpStream(org.xnio.nio.test.XnioWorkerTestCase) Time elapsed: 0.017 s <<< FAILURE!
[ 259s] java.lang.AssertionError
[ 259s] at org.junit.Assert.fail(Assert.java:86)
[ 259s] at org.junit.Assert.assertTrue(Assert.java:41)
[ 259s] at org.junit.Assert.assertNotNull(Assert.java:712)
[ 259s] at org.junit.Assert.assertNotNull(Assert.java:722)
[ 259s] at org.xnio.nio.test.XnioWorkerTestCase.cancelAcceptTcpStream(XnioWorkerTestCase.java:484)
[ 259s] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ 259s] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ 259s] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ 259s] at java.lang.reflect.Method.invoke(Method.java:498)
[ 259s] at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
[ 259s] at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
[ 259s] at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:52)
[ 259s] at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
[ 259s] at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
[ 259s] at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
[ 259s] at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
[ 259s] at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
[ 259s] at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
[ 259s] at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
[ 259s] at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
[ 259s] at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
[ 259s] at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
[ 259s] at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
[ 259s] at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
[ 259s] at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
[ 259s] at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
[ 259s] at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
[ 259s] at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
[ 259s] at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:383)
[ 259s] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:344)
[ 259s] at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
[ 259s] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:417)
[ 259s]
[ 259s] [INFO] Running org.xnio.nio.test.FileSystemWatcherTestCase
[ 259s] [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.03 s - in org.xnio.nio.test.FileSystemWatcherTestCase
[ 259s] [INFO] Running org.xnio.nio.test.NioUdpTestCase
[ 259s] [INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.013 s - in org.xnio.nio.test.NioUdpTestCase
[ 259s] [INFO] Running org.xnio.nio.test.NioHalfDuplexChannelPipeTestCase
[ 260s] [INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.12 s - in org.xnio.nio.test.NioHalfDuplexChannelPipeTestCase
[ 263s] [INFO]
[ 263s] [INFO] Results:
[ 263s] [INFO]
[ 263s] [ERROR] Failures:
[ 263s] [ERROR] XnioWorkerTestCase.cancelAcceptTcpStream:484
[ 263s] [INFO]
[ 263s] [ERROR] Tests run: 121, Failures: 1, Errors: 0, Skipped: 8
[ 263s] [INFO]
[ 263s] [INFO]
[ 263s] [INFO] ------------------------------------------------------------------------
[ 263s] [INFO] Skipping XNIO Parent POM
[ 263s] [INFO] This project has been banned from the build due to previous failures.
[ 263s] [INFO] ------------------------------------------------------------------------
[ 263s] [INFO] ------------------------------------------------------------------------
[ 263s] [INFO] Reactor Summary for XNIO Parent POM 3.4.0.Final:
[ 263s] [INFO]
[ 263s] [INFO] XNIO Parent POM .................................... SUCCESS [ 0.402 s]
[ 263s] [INFO] XNIO API ........................................... SUCCESS [ 57.444 s]
[ 263s] [INFO] XNIO NIO Implementation ............................ FAILURE [02:21 min]
[ 263s] [INFO] ------------------------------------------------------------------------
[ 263s] [INFO] BUILD FAILURE
该失败用例为：https://github.com/xnio/xnio/blob/3.4.0.Final/nio-impl/src/test/java/org/xnio/nio/test/XnioWorkerTestCase.java 第483行，如下：
464 @Test
465 public void cancelAcceptTcpStream() throws CancellationException, IOException {
466 final XnioWorker xnioWorker = xnio.createWorker(OptionMap.EMPTY);
467 final TestChannelListener<ConnectedStreamChannel> channelListener = new TestChannelListener<ConnectedStreamChannel>();
468 final TestChannelListener<BoundChannel> bindListener = new TestChannelListener<BoundChannel>();
469 final IoFuture<ConnectedStreamChannel> channelFuture = xnioWorker.acceptStream(bindAddress, channelListener, bindListener, OptionMap.EMPTY);
470 final IoFuture<ConnectedStreamChannel> connectedStreamChannel = xnioWorker.connectStream(bindAddress, null, OptionMap.EMPTY);
471
472 assertNotNull(connectedStreamChannel);
473 assertNotNull(channelFuture);
474
475 channelFuture.cancel();
476
477 CancellationException expected = null;
478 try {
479 channelFuture.get();
480 } catch (CancellationException e) {
481 expected = e;
482 }
483 assertNotNull(expected);
484
485 assertFalse(channelListener.isInvokedYet());
486 if (bindListener.isInvokedYet()) {
487 BoundChannel boundChannel = bindListener.getChannel();
488 assertNotNull(boundChannel);
489 assertFalse(boundChannel.isOpen());
490 }
491 }
失败的原因：channelFuture.cancel()执行失败，导致connectionFuture1.get()执行成功，从而expected为空，最终assertNotNull(expected)断言失败。
该测试用例根据环境的不同存在概率性失败，这种用例不保证100%成功，上游社区最新的解决办法是channelFuture.cancel()执行失败后重新执行一次，减少偶线失败的概率。
上游社区修改提交：https://github.com/xnio/xnio/commit/f4e4b053e29298be8df8941aefc93d82c0be2f1c
上游社区该提交在3.8.3版本合入，由于xnio上层依赖较多，升级影响较大，建议先跳过该用例。
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