Yes, I think so. 2010/3/10 Miguel Ángel Álvarez de la Concepción <maalva...@us.es>
> I have intalled Hadoop in CentOS (Linux) and the test code is running on > Windows. > > Do I need cygwin to run the test code? > > > > *De:* Jeff Zhang [mailto:zjf...@gmail.com] > *Enviado el:* miércoles, 10 de marzo de 2010 14:10 > > *Para:* hdfs-user@hadoop.apache.org > *Asunto:* Re: Accessing Hadoop DFS for Data Storage and Retrieval Using > Java > > > > It seems you are running it in windows, then you should install cygwin, and > add C:/cygwin/bin on the Path environment variable . > > > 2010/3/10 Miguel Ángel Álvarez de la Concepción <maalva...@us.es> > > Thanks! > > > > Now, the error occurs after copying the remote file I uploaded before: > > > > java.io.IOException: Cannot run program "chmod": CreateProcess error=2, The > system can’t find the specified file > > at java.lang.ProcessBuilder.start(ProcessBuilder.java:459) > > at org.apache.hadoop.util.Shell.runCommand(Shell.java:149) > > at org.apache.hadoop.util.Shell.run(Shell.java:134) > > at > org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:286) > > at org.apache.hadoop.util.Shell.execCommand(Shell.java:354) > > at org.apache.hadoop.util.Shell.execCommand(Shell.java:337) > > at > org.apache.hadoop.fs.RawLocalFileSystem.execCommand(RawLocalFileSystem.java:481) > > at > org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:473) > > at > org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:280) > > at > org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:372) > > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:484) > > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:465) > > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:372) > > at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:208) > > at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:142) > > at > org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1216) > > at > org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1197) > > at hadoop.testHadoop.main(testHadoop.java:53) > > Caused by: java.io.IOException: CreateProcess error=2, The system can’t > find the specified file > > at java.lang.ProcessImpl.create(Native Method) > > at java.lang.ProcessImpl.<init>(ProcessImpl.java:81) > > at java.lang.ProcessImpl.start(ProcessImpl.java:30) > > at java.lang.ProcessBuilder.start(ProcessBuilder.java:452) > > ... 17 more > > > > Thanks again for your help. > > > > *De:* Jeff Zhang [mailto:zjf...@gmail.com] > *Enviado el:* martes, 09 de marzo de 2010 17:13 > *Para:* hdfs-user@hadoop.apache.org > *Asunto:* Re: Accessing Hadoop DFS for Data Storage and Retrieval Using > Java > > > > > add ugi configuration like this : > > conf.set("hadoop.job.ugi",your_hadoop_user_name+","+your_hadoop_group_name); > > 2010/3/9 Miguel Ángel Álvarez de la Concepción <maalva...@us.es> > > Hi, > > > > I tried to run the Java code and it doesn't work. > > > > I pasted the code below: > > > > public class testHadoop { > > public static final String DIR_HADOOP = "hdfs://my.machine.com"; > > public static final String PORT_HADOOP = "9000"; > > > > public static void main(String[] args) { > > Configuration config = new Configuration(); > > config.set("fs.default.name", DIR_HADOOP + ":" + PORT_HADOOP); > > > > try { > > FileSystem haddopFileSystem = FileSystem.get(config); > > > > String directory = "test"; > > Path hadoopDirectory = new > Path(haddopFileSystem.getWorkingDirectory() + "/" + directory); > > > > haddopFileSystem.mkdirs(hadoopDirectory); > > > > Path sourceDirectory = new > Path("C://Windows/media/ringout.wav"); > > > > haddopFileSystem.copyFromLocalFile(sourceDirectory, > hadoopDirectory); > > > > Path sourceFile = new > Path(haddopFileSystem.getWorkingDirectory() + "/test/ringout.wav"); > > Path targetDirectory = new Path("C://"); > > > > haddopFileSystem.copyToLocalFile(sourceFile, targetDirectory); > > > > haddopFileSystem.delete(hadoopDirectory, true); > > } catch(IOException ex) { > > Logger.getLogger(testHadoop.class.getName()).log(Level.SEVERE, > null, ex); > > } > > } > > } > > > > The result of this code is an exception: > > > > org.apache.hadoop.security.AccessControlException: > org.apache.hadoop.security.AccessControlException: Permission denied: > user=varadero\miguelangel, access=WRITE, > inode="tmp":root:supergroup:rwxr-xr-x > > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > > at > org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:96) > > at > org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:58) > > at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:914) > > at > org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:262) > > at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:1120) > > at hadoop.testHadoop.main(testHadoop.java:37) > > Caused by: org.apache.hadoop.ipc.RemoteException: > org.apache.hadoop.security.AccessControlException: Permission denied: > user=varadero\miguelangel, access=WRITE, > inode="tmp":root:supergroup:rwxr-xr-x > > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.check(PermissionChecker.java:176) > > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.check(PermissionChecker.java:157) > > at > org.apache.hadoop.hdfs.server.namenode.PermissionChecker.checkPermission(PermissionChecker.java:105) > > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:4514) > > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkAncestorAccess(FSNamesystem.java:4484) > > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:1766) > > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:1735) > > at > org.apache.hadoop.hdfs.server.namenode.NameNode.mkdirs(NameNode.java:542) > > 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:597) > > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) > > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) > > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) > > at java.security.AccessController.doPrivileged(Native Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > > > at org.apache.hadoop.ipc.Client.call(Client.java:740) > > at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) > > at $Proxy0.mkdirs(Unknown Source) > > 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:597) > > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82) > > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) > > at $Proxy0.mkdirs(Unknown Source) > > at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:912) > > ... 3 more > > > > What's happend? > > > > Miguel Ángel Álvarez de la Concepción > > Departamento de Lenguajes y Sistemas Informáticos > > Escuela Técnica Superior de Ingeniería Informática > > Universidad de Sevilla > > Teléfono: 954.556.086 > > Email: maalva...@us.es > > > > > > > -- > Best Regards > > Jeff Zhang > > > > > -- > Best Regards > > Jeff Zhang > -- Best Regards Jeff Zhang