The other day I can across an issue where paypal had changed their sandbox to TLS 1.2.
This caused railo to fail a cfhttp call to it's https address. After reading a few posts it looked like I was going to have to migrate to lucee to overcome the issue. (not the end of the world)... but
As it turned out, all that was needed was a quick move from java 7 to using java 8 and all connection issues were resolved.
Download and extract the new JRE into a folder,
Add the new JRE address into the setenv.sh
and restart railo.