jon-wei commented on issue #7015: [Issue #6967] NoClassDefFoundError when using druid-hdfs-storage URL: https://github.com/apache/incubator-druid/pull/7015#issuecomment-461207328 There are some real UT failures: ``` org.apache.druid.segment.loading.HdfsDataSegmentFinderTest Time elapsed: 2.25 sec <<< ERROR! java.lang.NoClassDefFoundError: org/apache/hadoop/net/StaticMapping at org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:807) at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:485) at org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:444) at org.apache.druid.segment.loading.HdfsDataSegmentFinderTest.setupStatic(HdfsDataSegmentFinderTest.java:148) 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$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367) at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.net.StaticMapping at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 21 more ``` Maybe some adjustment is needed for hadoop-common dependency in test scope
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