Upgrade Php 5.4 to 5.6 = 502 error, then blank

After upgrading I'm seeing 502 error when browsing sites.

Setup is debian jesse, php 5.6, fpm, nginx, maraud 10.1

I thought the issue might be the location of /var/run/php5-fpm/mysocket so I made them all /var/run/mysocket, now no 502 error but just blank pages.

Checked individual site error logs, nginx log, php5-fpm log and nothing. Fpm is running.

Basically I was following this to upgrade wheezy to jesse and it upgraded my php too.

https://www.linode.com/docs/security/up … n-8-jessie">https://www.linode.com/docs/security/upgrading/upgrade-to-debian-8-jessie

I have a backup, but would like to see if it can be corrected.

Not sure where else to look to see what error is happening.