Not sure if my error is related to the control path (see link below) or not, but I got a error about not being able to transfer a file in my logs.
2014-12-04 10:02:47,137 p=1602 u=jmcmahon | TASK: [census.deploy | Copy .ruby-gemset to releases] *************************
Read from socket failed: Connection reset by peer^M
Connection closed^M
2014-12-04 10:07:21,741 p=1602 u=jmcmahon | FATAL: all hosts have already failed -- aborting
2014-12-04 10:07:21,741 p=1602 u=jmcmahon | PLAY RECAP ********************************************************************
2014-12-04 10:07:21,743 p=1602 u=jmcmahon | to retry, use: --limit @/Users/jmcmahon/deploy-census.retry
Any ideas on what happened? I was able to manually run the script again and all worked fine.