daemon.log fills up with xrun log lines

[ambv]

On OG aluminium Norns with 4GB of storage, the new image takes up quite a bit of space. There's less than a 1GB left for user data after a clean install so it would be nice if we could somehow make logging more efficient.

I'm looking at daemon.log and find it pretty big after ~12 hours of runtime. It's 66MB with a number of repeated lines (sorted here):

 258721 norns jackd[384]: JackAudioDriver::ProcessGraphAsyncMaster: Process error
 246914 norns jackd[384]: JackEngine::XRun: client = softcut was not finished, state = Running
  76709 norns jackd[453]: JackAudioDriver::ProcessGraphAsyncMaster: Process error
  73652 norns jackd[453]: JackEngine::XRun: client = softcut was not finished, state = Running
   6375 norns jackd[384]: JackEngine::XRun: client = softcut was not finished, state = Triggered
   5636 norns jackd[384]: JackEngine::XRun: client softcut finished after current callback
   2804 norns ws-wrapper[2550]: station  0  queing next file  1  of  1
   2804 norns ws-wrapper[2550]: station 0 playing file /dev/shm/weather.wav
   1937 norns ws-wrapper[2550]: MP3.start: command to execute is:
   1675 norns jackd[453]: JackEngine::XRun: client = softcut was not finished, state = Triggered

As you can see, there's 250 thousand xruns reported. This log survives a restart.

[tehn]

image setup is supposed to limit log sizes, so something is not working correctly since we moved to bullseye. if you spot the config problem please let us know.

[ambv]

I discovered that logrotate isn't running, it's failing to start with:

Jun 16 09:53:21 norns systemd[1]: Starting Rotate log files...
Jun 16 09:53:21 norns logrotate[866]: error: /etc/logrotate.conf:18 duplicate log entry for /var/log/wtmp
Jun 16 09:53:21 norns logrotate[866]: error: /etc/logrotate.conf:25 duplicate log entry for /var/log/btmp
Jun 16 09:53:21 norns systemd[1]: logrotate.service: Main process exited, code=exited, status=1/FAILURE
Jun 16 09:53:21 norns systemd[1]: logrotate.service: Failed with result 'exit-code'.
Jun 16 09:53:21 norns systemd[1]: Failed to start Rotate log files.

This is on a clean install of the newest image (+update on device).

[ambv]

The problem is that logrotate.conf includes sections for wtmp and btmp but there are also separate files for those logs in logrotate.d so they end up being duplicated.

[simonvanderveldt]

There should be no reason for logrotate because there should be no log files, all logs should be taken care of by systemd/the journal. If there's a log file somewhere that should probably be fixed to make sure the logs end up in the journal.

[ambv]

The log this issue is about is a file under the path /var/log/daemon.log. Don't you see one on your installations?

In my case there are also auth.log, debug, dpkg.log, kern.log, messages, syslog, user.log, and wtmp. All of which see use.

[simonvanderveldt]

Maybe something went wrong or was changed in the config with the switch/upgrade to Debian Buster?

[ambv]

Likely. This is somewhat high priority because it turns out daemon.log fills up also with regular operation, like when receiving OSC messages. I filed a separate issue for that.