server.init();
FileSystemAccess hadoop = server.get(FileSystemAccess.class);
FileSystem fs = hadoop.createFileSystem("u", hadoop.getFileSystemConfiguration());
Assert.assertNotNull(fs);
fs.mkdirs(new Path("/tmp/foo"));
hadoop.releaseFileSystem(fs);
try {
fs.mkdirs(new Path("/tmp/foo"));
Assert.fail();
} catch (IOException ex) {
} catch (Exception ex) {