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