I’m having issue with Talk on new 18.0.6 install.
Call window crashes, Chrome suggests to close it right away.
I see some 503 errors from spreed API in log.
Failed to load resource: the server responded with a status of 502 ()
CallButton.vue:162 Joining call
webrtc.js:803 localMediaStarted
/ocs/v2.php/apps/spreed/api/v1/call/452qe72t:1 Failed to load resource: the server responded with a status of 404 ()
signaling.js:307 Uncaught (in promise) Error
at signaling.js:307
CallButton.vue:173
Well than that is your issue.
Just as an info, with talk in a call, you have 2 long running requests per user all the time, so make sure you have enough works that all other requests are still served in time.
[23-Jun-2020 19:31:47] NOTICE: systemd monitor interval set to 10000ms
[23-Jun-2020 19:31:54] WARNING: [pool www] child 6042 exited on signal 11 (SIGSEGV) after 7.046424 seconds from start
[23-Jun-2020 19:31:54] NOTICE: [pool www] child 6044 started
[23-Jun-2020 19:32:51] WARNING: [pool www] child 6041 exited on signal 11 (SIGSEGV) after 64.163499 seconds from start
[23-Jun-2020 19:32:51] NOTICE: [pool www] child 6060 started
[23-Jun-2020 19:40:04] WARNING: [pool www] child 6034 exited on signal 11 (SIGSEGV) after 496.901954 seconds from start
This segfault in fpm causes nginx to fail with 502.
The reason may be anything - to many children, not enough RAM, not writable sessions directory. I had to disable opcache [opcache.enable=0]