Compiled the version 0.21.0 (as well as the latest version). When I bring up the master, it connects to zookeeper, slave is also able to connect, but I could not see any webui at 5050. It is just a blank screen(invalid ports like 5051 are giving connection refused error). Initially i was running the master as docker container, but later i tested the exe directly on ubuntu 14.04.1 and i got the same behaviour. is there a bug or i am doing a mistake. The command i used to run the master "./mesos-master -ip=188.8.131.52 --zk=zk://184.108.40.206:2181/mesos --work_dir=/var/lib/mesos/master --log_dir=/var/log/mesos/master --hostname=220.127.116.11 --quorum=1"