InetSocketAddress infoSocAddr = NetUtils.createSocketAddr(
conf.get(JT_HTTP_ADDRESS, "0.0.0.0:50030"));
String infoBindAddress = infoSocAddr.getHostName();
int tmpInfoPort = infoSocAddr.getPort();
this.startTime = clock.getTime();
infoServer = new HttpServer("job", infoBindAddress, tmpInfoPort,
tmpInfoPort == 0, conf, aclsManager.getAdminsAcl());
infoServer.setAttribute("job.tracker", this);
// initialize history parameters.
jobHistory = new JobHistory();
jobHistory.init(this, conf, this.localMachine, this.startTime);