Hi Kareem, Hi See that issue you are facing is https://issues.apache.org/jira/browse/HADOOP-9908,
It expectes common-version-info.properties to be present under classes directory, which will be present while running tests from maven. But when eclipse cleans the output and compiles again this will be cleaned. So I suggest merge the changes to your VersionInfo.java from HADOOP-9908 and run the test. It just eats the NPE and unblock you from running tests. BTW, You may face another problem saying, "webapps/hdfs not found" after version file problem is solved. Well I have a solution for that too. If yes, follow below steps to resolve that. This kind of workaround only, I didnt see the fix available. 1. Create a folder in hadoop-hdfs, ex: web 2. Copy full hadoop-hdfs/target/webapps directory to hadoop-hdfs/web 3. Now add hadoop-hdfs/web as source directory in eclipse project. 4. Rebuild hadoop-hdfs and run the test. If any more problems let me know. Cheers, Vinayakumar B From: Karim Awara [mailto:karim.aw...@kaust.edu.sa] Sent: 15 December 2013 22:26 To: user Subject: Re: MiniDFSCluster setup I imported all the projects under the root dir "hadoop-2.2.0-src". And still the same error. I havenot touched any conf files after I build with maven. Is that correct? because it seems eclipse is not aware of some sources that command-line maven is aware of. -- Best Regards, Karim Ahmed Awara On Sun, Dec 15, 2013 at 7:10 PM, Ted Yu <yuzhih...@gmail.com<mailto:yuzhih...@gmail.com>> wrote: Can you import from root of your workspace so that all sub-projects are imported ? Cheers On Sun, Dec 15, 2013 at 7:45 AM, Karim Awara <karim.aw...@kaust.edu.sa<mailto:karim.aw...@kaust.edu.sa>> wrote: Attached below. So What I did was after downloading hadoop src. I ran $ mvn install -DskipTests $ mvn eclipse:eclipse -DdownloadSources=true -DdownloadJavadocs=true And imported both Hadoop Common and HDFS projects into eclipse. java.lang.ExceptionInInitializerError at org.apache.hadoop.hdfs.server.common.Storage.getBuildVersion(Storage.java:1026) at org.apache.hadoop.hdfs.server.protocol.NamespaceInfo.<init>(NamespaceInfo.java:58) at org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:550) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:837) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:266) at org.apache.hadoop.hdfs.DFSTestUtil.formatNameNode(DFSTestUtil.java:122) at org.apache.hadoop.hdfs.MiniDFSCluster.createNameNodesAndSetConf(MiniDFSCluster.java:775) at org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:642) at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:334) at org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:316) at org.apache.hadoop.hdfs.TestWriteRead.initJunitModeTest(TestWriteRead.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: java.lang.NullPointerException at java.util.Properties$LineReader.readLine(Properties.java:435) at java.util.Properties.load0(Properties.java:354) at java.util.Properties.load(Properties.java:342) at org.apache.hadoop.util.VersionInfo.<init>(VersionInfo.java:51) at org.apache.hadoop.util.VersionInfo.<clinit>(VersionInfo.java:97) ... 36 more java.lang.NullPointerException at org.apache.hadoop.hdfs.TestWriteRead.shutdown(TestWriteRead.java:89) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:36) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) -- Best Regards, Karim Ahmed Awara On Sun, Dec 15, 2013 at 5:59 PM, Ted Yu <yuzhih...@gmail.com<mailto:yuzhih...@gmail.com>> wrote: Can you show us the full stack trace ? In Eclipse, was there any project shown with a red bang or red cross ? Cheers On Sun, Dec 15, 2013 at 2:26 AM, Karim Awara <karim.aw...@kaust.edu.sa<mailto:karim.aw...@kaust.edu.sa>> wrote: It tells me java.lang.ExceptionInitializerError at org.apache.....hdfs.server.common.Storage.getBuildVersion! I feel I am missing some parameters? -- Best Regards, Karim Ahmed Awara On Sun, Dec 15, 2013 at 5:08 AM, Ted Yu <yuzhih...@gmail.com<mailto:yuzhih...@gmail.com>> wrote: You can use the following command to generate .project files for Eclipse (at the root of your workspace): mvn clean package -DskipTests eclipse:eclipse When you import hadoop, call sub-projects would be imported. I was able to run TestWriteRead in Eclipse successfully. Cheers On Sat, Dec 14, 2013 at 4:56 PM, Karim Awara <karim.aw...@kaust.edu.sa<mailto:karim.aw...@kaust.edu.sa>> wrote: Running the test from Maven through commandline works fine. But I am using eclipse. And it generates problem if I try to run the test as Junit, as if eclipse is not aware of any of the conf parameters or args. Can someone point to me a detailed source where it explains how to run Junit through Eclipse for hadoop 2.2.x? -- Best Regards, Karim Ahmed Awara On Sun, Dec 15, 2013 at 2:55 AM, Ted Yu <yuzhih...@gmail.com<mailto:yuzhih...@gmail.com>> wrote: If you search under hadoop-hdfs-project/hadoop-hdfs/src/test, you would see a lot of tests which use MiniDFSCluster e.g. cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build(); hadoop-hdfs-project/hadoop-hdfs/src/test//java/org/apache/hadoop/hdfs/TestWriteRead.java Cheers On Sat, Dec 14, 2013 at 2:43 PM, Karim Awara <karim.aw...@kaust.edu.sa<mailto:karim.aw...@kaust.edu.sa>> wrote: Hi, I read I can use MiniDFSCluster to set my own tests in case I modify hadop source code. I have built hadoop 2.2. However, I can't find any source on how to get the MiniDFSCluster working. Can someone point a link to me that helps? -- Best Regards, Karim Ahmed Awara ________________________________ This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email. ________________________________ This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. 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