zhjwpku commented on issue #1670: HDFS-14925. Rename operation should check nest snapshot URL: https://github.com/apache/hadoop/pull/1670#issuecomment-546542548 @jojochuang I didn't get TestRollingUpgrade failed when I run it locally. Can you pls help to check is it a flaky test? Following it error message: ``` [ERROR] Tests run: 13, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 141.704 s <<< FAILURE! - in org.apache.hadoop.hdfs.TestRollingUpgrade [ERROR] testRollback(org.apache.hadoop.hdfs.TestRollingUpgrade) Time elapsed: 84.111 s <<< FAILURE! java.lang.AssertionError: Test resulted in an unexpected exit at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:2073) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:2060) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:2053) at org.apache.hadoop.hdfs.TestRollingUpgrade.testRollback(TestRollingUpgrade.java:354) 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.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 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) ```
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