Cannot start PDF Service Manager on Ubuntu ("connection refused")

Al, this COULD be a firewall issue, sure.

But let's turn our attention also to how the pdfg (or "addon") service is configured, regarding IPs and ports. There may well be a config issue THERE which is blocking your attempt to access it. (And this could apply to the other folks much earlier in the thread.)

1) A first step is to find whether the addon/pdfg service is installed and running from within the CF folder (/opt/ColdFusion2021/cfusion/jetty) or in its own folder (/opt/coldfusionaddonservices , with no jetty but which has the same files/folders the cfusion/jetty would have).

I realize you said you used the add-on services installer, but whoever installed CF ALSO was given the option to install this pdfg/addon service, and that would implement it in that CF jetty folder. (And yes, one could HAVE BOTH INSTALLED, and even both running if they are set to use different ports.)

Since you're not clear about how things are working, it just seems worth you checking for both. If you HAVE no jetty folder under cfusion, then you or whoever installed CF did NOT accept the option when offered in the CF installer.

2a) Anyway, whichever you have (or both), look at the start.ini in that folder. And look for a line like this:

## Connector host/address to bind to
#jetty.http.host=0.0.0.0

That second line may or may not be commented, and it may have a different IP address. What does yours have? (My observation has been--at least with CF2021 and the version of jetty that it includes--that if it is like the above, it defaults to that 0.0.0.0 value).

And this stuff can get confusing (and it's late for me), but I'm pretty sure this is what IP address this pdfg/jetty service is willing to LISTEN ON--meaning that when a request makes a call INTO it, like the "localhost" you may have set in the CF admin pdf service definition (or  you may perhaps use some machine name or domain name instead), what IP does THAT resolve to, and is it willing to accept/listen on that?

More specifically, if for instance you see the ip (as indicated that ini file host value) as something like 192.168.1.19, then it means it's only willing to accept a request (from CF, via that PDF service configruation in the CF Admin) which asks for THAT ip address. Any other would be rejected, like you saw in the CF log.

Again, that's my understanding, but I could be wrong. At least let's hear what your value is, and we can go from there. Perhaps others will have more info to share.

Note also that there could be matters of ipv4 vs ipv6 that also can cause confusion.

2b) Moving on, the next line in the ini file will show something like:

## Connector port to listen on
jetty.http.port=8993

That of course is the port on which it listens. What does yours have? Of course, you'd want to tell the CF pdf service to talk to this pdfg/addon service using that port.

And again, it would be best to check both the [CF]/cfusion/jetty and the addonservices folders, in case somehow you may have both running.

3) As another sanity check, look in each folder's logs folder (like /opt/coldfusionaddonservices/logs, or /opt/ColdFusion2021/cfusion/jetty/logs). You should find a log for today (assuming the service was started today) with both its date modified and literally its name showing today's date. (If there are none, then it would seem this instance is NOT the one to be paying attention to. Look at the other.)

In the current day's stderrour.log (like /opt/ColdFusion2021/cfusion/jetty/logs/2021_12_30.stderrout.log), look about 20 lines down for a line like this:

Started ServerConnector@27ec9117{HTTP/1.1, (http/1.1)}{0.0.0.0:8993}

What do you show for those last two values? Those SHOULD match what's set in the start.ini values above. And in my case, when it showed that host line commented out, the 0.0.0.0 is indeed what I had in the log entry. And the port matched.

Let's hear what you have, and perhaps it can help move the ball down the field. I'm open to correction, of course, if I have something wrong in my interpretation of things.

So far not working. Downloaded and ran the "ColdFusion_2021_Addon_WWEJ_linux64.bin" installer, restarted ColdFusion and then attempted to start the PDF Service. Got these errors:

coldfusion-out.log:

Mar 20, 2021 11:00:58 AM Error [http-nio-8500-exec-7] - Server Error
Mar 20, 2021 11:00:58 AM Error [http-nio-8500-exec-7] - Connection verification failed. http://127.0.0.1:8993/PDFgServlet/verify
Mar 20, 2021 11:00:58 AM Error [http-nio-8500-exec-7] - Error enabling PDF Service Manager.
Mar 20, 2021 11:00:58 AM Error [http-nio-8500-exec-7] - coldfusion.document.webkit.PDFgErrorHandler$ConnectionVerificationFailedException: Connection verification failed.