Troubleshooting process RT4.4.1 won't start-ish

Looking for suggestions on troubleshooting our rt4 instance. We have a CentOS 6.7 VM as our test/dev/machine, running Apache 2.2.15 and perl 5.10.1.

This environment currently has 2 instances of RT running on it, which I can access via the web client, np.

We wish to upgrade to 4.4.1, so I’ve been figuring out how to do that. 4.4.1 has been configured, installed, db upgraded, all painfully but those tasks are complete.

When I direct my browser to the 4.4.1 instance, I get “This page can’t be displayed.”

I’m looking for ideas on what to troubleshoot, things to check.

I’ve checked the Apache error_log and the RT httpd.error log, no real pointers there. I have stopped and started Apache a coupla times, I do get the critical about Mail plugins not being forward compatible. Is that enough to prevent RT from starting?

I have verified that rt-server will run by starting it with PSGI, but I still can’t get in with a browser. I suspect there is a config wrong somewhere. Will post if I find it.

I’ve been out for training, so had walked away from this for about a week. We had figured that the issue was dns, but I’m not entirely sure that’s the case. Opening a new thread to chase down the latest mystery.