Juniper/contrail-controller — pull request #644 by bailkeri (2014-04-22 10:09:19+00:00)
Title: increase the default timeout of 20 secs. 

The heartbeats are expected to be sent every 1/3 the timeout interval and response received within 1/3 timeout. We have seen the writes to disk take as high as 5-6 secs and hence heartbeat response missed and reconnects.

https://github.com/python-zk/kazoo/issues/66