PHP7 upstream connection error


Hi All

I have been running PHP7 successfully for a number of months for all of my sites, all under EE.

Last week I had a meltdown with all the sites. Under pressure, I reverted to PHP5. I have Googled and read, but cannot find the answer to the following typical error: 2017/01/23 21:35:18 [error] 20766#20766: *15636 connect() failed (111: Connection refused) while connecting to upstream, client:, server:, request: “GET / HTTP/1.1”, upstream: “fastcgi://”, host: “”, referrer: “

I can see that port 9070 is in upstream.conf for PHP7, but how do I fix this? Any suggestions? Help!