cdap-ui dies when master is killed

Description

It should not crash in that situation. The router would start routing to the secondary master and the ui would function again. The ui should wait for that and then get back to normal. In the logs I see:

Error: socket hang up
    at createHangUpError (http.js:1477:15)
    at Socket.socketOnEnd [as onend] (http.js:1573:23)
    at Socket.g (events.js:180:16)
    at Socket.emit (events.js:117:20)
    at _stream_readable.js:944:16
    at process._tickCallback (node.js:442:13)
/var/log/cdap/ui-cdap-hanew1792-1000.dev.continuuity.net.log (END)