@Nick Giammanco As per WARN message you shared HttpParser is failing to parse the response from a HTTP request I think. Could you check If same code runs fine on local mode --master local? If same code runs fine in local mode perhaps there is a firewall/network issue when you run the code in yarn-cluster mode (driver and executors will run on cluster worker nodes), which causes the HTTP requests to fail. Another point to check is whether you need to use an http-proxy. HTH ... View more