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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2942) Unit test fails on Windows: org.apache.hadoop.dfs.TestDFSShell.testErrOutPut
Date Thu, 06 Mar 2008 21:56:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sanjay Radia updated HADOOP-2942:
---------------------------------

    Assignee: Mahadev konar  (was: Sanjay Radia)

> Unit test fails on Windows: org.apache.hadoop.dfs.TestDFSShell.testErrOutPut
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-2942
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2942
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.17.0
>         Environment: windows
>            Reporter: Mukund Madhugiri
>            Assignee: Mahadev konar
>            Priority: Blocker
>             Fix For: 0.17.0
>
>
> Unit test fails on Windows: org.apache.hadoop.dfs.TestDFSShell.testErrOutPut
> *Here are the changes:*
> - HADOOP-2931. IOException thrown by DFSOutputStream had wrong stack trace in some cases.
(Michael Bieniosek via rangadi) (detail/ViewSVN)
> - HADOOP-2758. Reduce buffer copies in DataNode when data is read from HDFS, without
negatively affecting read throughput. (rangadi) (detail/ViewSVN)
> - move previous change log to the end of the section rather than the beginning (detail/ViewSVN)
> - HADOOP-2833. Do not use "Dr. Who" as the default user in JobClient. A valid user name
is required. (Tsz Wo (Nicholas), SZE via rangadi) (detail/ViewSVN)
> - HADOOP-2809.  Fix HOD syslog config syslog-address so that it works.  Contributed by
Hemanth Yamijala. (detail/ViewSVN)
> - HADOOP-2847.  Ensure idle cluster cleanup works even if the JobTracker becomes unresponsive
to RPC calls. Contributed by Hemanth Yamijala. (detail/ViewSVN)
> - HADOOP-2819. The following methods in JobConf are removed: getInputKeyClass() setInputKeyClass
getInputValueClass() setInputValueClass(Class theClass) setSpeculativeExecution getSpeculativeExecution().
Contributed by Amareshwari Sri Ramadasu. (detail/ViewSVN)
> - HADOOP-2820. The following classes in streaming are removed : StreamLineRecordReader
StreamOutputFormat StreamSequenceRecordReader. Contributed by Amareshwari Sri Ramadasu. (detail/ViewSVN)
> - HADOOP-2219. A new command "df -count" that counts the number of files and directories.
 (Tsz Wo (Nicholas), SZE via dhruba) (detail/ViewSVN)
> - HADOOP-2912. MiniDFSCluster restart should wait for namenode to exit safemode. This
was causing TestFsck to fail.  (Mahadev Konar via dhruba) (detail/ViewSVN)
> *Standard Error:*
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testURIPaths(TestDFSShell.java:329)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=FSNamesystemStatus
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.FSNamesystem.registerMBean(FSNamesystem.java:4183)
> 	at org.apache.hadoop.dfs.FSNamesystem.initialize(FSNamesystem.java:290)
> 	at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:252)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:132)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testURIPaths(TestDFSShell.java:329)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testText(TestDFSShell.java:415)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> text: File /texttest/file.gz does not exist.
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testCopyToLocal(TestDFSShell.java:460)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> copyToLocal: null
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testCount(TestDFSShell.java:557)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testFilePermissions(TestDFSShell.java:671)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> chown: could not get status for '/nonExistentFile': File /nonExistentFile does not exist.
> chown: could not get status for 'unknownFile': File unknownFile does not exist.
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testDFSShell(TestDFSShell.java:717)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> cat: File /test/mkdirs/myFile1 does not exist.
> rm: cannot remove /test/mkdirs/myFile1: No such file or directory.
> cp: Cannot copy /test/dir1 to its subdirectory /test/dir1/dir2
> javax.management.InstanceAlreadyExistsException: hadoop.dfs:service=NameNode,name=NameNodeStatistics
> 	at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
> 	at org.apache.hadoop.metrics.util.MBeanUtil.registerMBean(MBeanUtil.java:52)
> 	at org.apache.hadoop.dfs.namenode.metrics.NameNodeStatistics.<init>(NameNodeStatistics.java:40)
> 	at org.apache.hadoop.dfs.NameNodeMetrics.<init>(NameNodeMetrics.java:69)
> 	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:177)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:163)
> 	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:866)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:264)
> 	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:113)
> 	at org.apache.hadoop.dfs.TestDFSShell.testGet(TestDFSShell.java:959)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
> 	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
> get: Checksum error: /blk_3985910936379526606:of:/test/get/testGet.txt at 0

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