I have downloaded the latest source **release 11044 **from svn. I compiled and ran the spark.
i have 2 proxys running, http (with username and password) and socks (without username/password, running based on ip restriction). spark 2.5.8 at present connects on both http and socks but the current compiled version 11044 of spark beta2 doesnot connect via proxy. I even tried reverting back to 11036, it also doesnot connect via proxy.
Please note i have the proxy working fine with version 2.5.8 perfect now. Also the version i compiled is untouched as fresh from the source.