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java.io.IOException: CreateProcess error=2, The system cannot find the file specified	at java.lang.ProcessImpl.create(Native Method)	at java.lang.ProcessImpl.(Unknown Source)	at java.lang.ProcessImpl.start(Unknown Source)	at java.lang.ProcessBuilder.start(Unknown Source)	at org.apache.hadoop.util.Shell.runCommand(Shell.java:200)	at org.apache.hadoop.util.Shell.run(Shell.java:182)	at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:375)	at org.apache.hadoop.util.Shell.execCommand(Shell.java:461)	at org.apache.hadoop.util.Shell.execCommand(Shell.java:444)	at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:703)	at org.apache.hadoop.fs.RawLocalFileSystem$RawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:418)	at org.apache.hadoop.fs.RawLocalFileSystem$RawLocalFileStatus.getPermission(RawLocalFileSystem.java:393)	at org.apache.hadoop.util.DiskChecker.mkdirsWithExistsAndPermissionCheck(DiskChecker.java:146)	at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:162)	at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1537)	at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1484)	at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1459)	at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes(MiniDFSCluster.java:417)	at org.apache.hadoop.hdfs.MiniDFSCluster.(MiniDFSCluster.java:280)	at org.apache.commons.vfs2.provider.hdfs.test.ReadOnlyHdfsFileProviderTest.(ReadOnlyHdfsFileProviderTest.java:85)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	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.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)