poll quietly fails when kafka server goes away and returns to service

[lancespeelmon]

Steps to reproduce:

1. Install and run kafka 0.8.2.
2. Start a process that polls a topic for messages. If you display debug emitters, you should see a message kafka.on debug: no data - reentering poll every few seconds.
3. Push some messages to topic and ensure the poller responds as expected.
4. Stop and restart kafka.
5. The poller goes quiet. No more kafka.on debug: no data - reentering poll messages and no indication that it will return from the spiral of death.

[lancespeelmon]

FYI - here is some more info that might help debug this issue:

kafka.on debug: no data - reentering poll
socket end
socket close
socket end
socket close

I am hoping to either see it re-establish the connection and re-enter poll if possible. If not, then throwing an error or exiting would be a decent option as I have pm2 auto restarting the process.