just to be clear, this is now all working correctly?

Ahh, it’s something in the mappings. I can confirm that this

docker run --rm  --network host -v/tmp/a:/var/www -v/tmp/a/WEB-INF:/opt/lucee lucee/lucee:5.3.9.160-SNAPSHOT-nginx

Exposes the log files correctly

No evidence of missing the first cflog message either.

(thanks to for that tip to expose the WEB-INF, so I can see all the files are being created in it easily)

Nope, still broken unless the fix isn’t in the latest 5.3.9 ?

Run as

docker run --rm --network host -v/tmp/a:/var/www -v/tmp/a/WEB-INF:/opt/lucee/web
lucee/lucee:5.3.9.160-SNAPSHOT-nginx

With /tmp/a/index.cfm as

Visit http://localhost/index.cfm

outputs

a {ts '2022-08-24 08:46:50'} b

But log file is empty

root@lego:/tmp/a/WEB-INF# cat logs/application.log  
"Severity","ThreadID","Date","Time","Application","Message"

Refresh the page, still no output.

Waited a few minutes, still no output.

i assume the issue is resolved for you . If not let us know and we could revisit it.