//创建文件核心代码

public static void createNewHDFSFile(String toCreateFilePath, String content) throws IOException

{

Configuration config = new Configuration();

config.set("hadoop.job.ugi", "Administrator,supergroup");

FileSystem hdfs = FileSystem.get(config);

FSDataOutputStream os = hdfs.create(new Path(toCreateFilePath));

os.write(content.getBytes("UTF-8"));

os.close();

hdfs.close();

}

使用： createNewHDFSFile("/tmp/create2.c", "hello");

错误信息：

Exception in thread "main" java.io.IOException: Cannot run program "chmod": CreateProcess error=2, ?????????

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.FileSystem.create(FileSystem.java:364)

at com.geoway.hadoop.example.HadoopFSOperations.createNewHDFSFile(HadoopFSOperations.java:54)

at com.geoway.hadoop.example.HadoopFSOperations.main(HadoopFSOperations.java:15)

Caused by: java.io.IOException: CreateProcess error=2, ?????????

at java.lang.ProcessImpl.create(Native Method)

at java.lang.ProcessImpl.(ProcessImpl.java:81)

at java.lang.ProcessImpl.start(ProcessImpl.java:30)

at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)

... 15 more

不知道什么原因 ，哪位能告诉我？