LOG.info("Testing jobtracker.info file");
MiniDFSCluster dfs = new MiniDFSCluster(new Configuration(), 1, true, null);
String namenode = (dfs.getFileSystem()).getUri().getHost() + ":"
+ (dfs.getFileSystem()).getUri().getPort();
// shut down the data nodes
dfs.shutdownDataNodes();
// start the jobtracker
JobConf conf = new JobConf();
FileSystem.setDefaultUri(conf, namenode);
conf.set(JTConfig.JT_IPC_ADDRESS, "localhost:0");