Ich habe ein Problem beim Versuch, eine Datei vom HDFS-Dateisystem auf mein lokales System herunterzuladen. (Auch wenn der Gegenbetrieb problemlos funktioniert). * Hinweis: Die Datei befindet sich im HDFS-Dateisystem unter dem angegebenen Pfad

Hier ist ein Codeausschnitt:

    Configuration conf = new Configuration();
    conf.set("fs.defaultFS", "${NAMENODE_URI}");
    FileSystem hdfsFileSystem = FileSystem.get(conf);

    String result = "";

    Path local = new Path("${SOME_LOCAL_PATH}");
    Path hdfs = new Path("${SOME_HDFS_PATH}");

    String fileName = hdfs.getName();

    if (hdfsFileSystem.exists(hdfs))
    {
        hdfsFileSystem.copyToLocalFile(hdfs, local);
        result = "File " + fileName + " copied to local machine on location: " + localPath;
    }
    else
    {
        result = "File " + fileName + " does not exist on HDFS on location: " + localPath;
    }

    return result;

Die Ausnahme, die ich erhalte, ist folgende:

12/07/13 14:57:46 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Exception in thread "main" java.io.IOException: Cannot run program "cygpath": CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessBuilder.start(Unknown Source)
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:206)
    at org.apache.hadoop.util.Shell.run(Shell.java:188)
    at org.apache.hadoop.fs.FileUtil$CygPathCommand.<init>(FileUtil.java:412)
    at org.apache.hadoop.fs.FileUtil.makeShellPath(FileUtil.java:438)
    at org.apache.hadoop.fs.FileUtil.makeShellPath(FileUtil.java:465)
    at org.apache.hadoop.fs.RawLocalFileSystem.execCommand(RawLocalFileSystem.java:573)
    at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:565)
    at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:403)
    at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:452)
    at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:420)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:774)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:755)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:654)
    at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:259)
    at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:232)
    at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:183)
    at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1837)
    at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1806)
    at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1782)
    at com.hmeter.hadoop.hdfs.hdfsoperations.HdfsOperations.fileCopyFromHdfsToLocal(HdfsOperations.java:75)
    at com.hmeter.hadoop.hdfs.hdfsoperations.HdfsOperations.main(HdfsOperations.java:148)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessImpl.create(Native Method)
    at java.lang.ProcessImpl.<init>(Unknown Source)
    at java.lang.ProcessImpl.start(Unknown Source)
    ... 22 more

Irgendeine Idee, was ein Problem sein könnte? Warum ist der cyqpath für Cygwin erforderlich? Ich führe diesen Code unter Windows 7 aus.

Vielen Dank