Nzbdrone main process ended, respawning

[benzo8]

Ubuntu: 14.04, Sonarr Development Branch: 2.0.0.2172, Mono:3.6

I’m seeing “init: nzbdrone main process ended, respawning” in my syslog, reported by the kernel pretty much once a second right now.

NZBDrone logs are filled with:

14-10-30 17:43:08.5|Info|Bootstrap|Application is being terminated. Reason : Another instance is already running
14-10-30 17:43:08.8|Info|Bootstrap|Starting NzbDrone - /opt/NzbDrone/NzbDrone.exe - Version 2.0.0.2177
14-10-30 17:43:09.7|Debug|ProcessProvider|Found 0 processes with the name: NzbDrone.Console
14-10-30 17:43:10.3|Debug|ProcessProvider|Found 2 processes with the name: NzbDrone
14-10-30 17:43:10.3|Info|SingleInstancePolicy|1 instance(s) of NzbDrone are running
14-10-30 17:43:10.3|Warn|SingleInstancePolicy|Another instance of NzbDrone is already running.
14-10-30 17:43:10.3|Debug|BrowserService|non-interactive runtime. Won't attempt to open browser.
14-10-30 17:43:10.3|Info|Bootstrap|Application is being terminated. Reason : Another instance is already running
14-10-30 17:43:10.6|Info|Bootstrap|Starting NzbDrone - /opt/NzbDrone/NzbDrone.exe - Version 2.0.0.2177
14-10-30 17:43:11.5|Debug|ProcessProvider|Found 0 processes with the name: NzbDrone.Console
14-10-30 17:43:12.1|Debug|ProcessProvider|Found 2 processes with the name: NzbDrone
14-10-30 17:43:12.2|Info|SingleInstancePolicy|1 instance(s) of NzbDrone are running

Any ideas what might be causing it?

[markus101]

14-10-30 17:43:10.3|Debug|ProcessProvider|Found 2 processes with the name: NzbDrone
14-10-30 17:43:10.3|Info|SingleInstancePolicy|1 instance(s) of NzbDrone are running

and

14-10-30 17:43:10.3|Info|Bootstrap|Application is being terminated. Reason : Another instance is already running

You have two instances running, kill them both and start the service up.

[benzo8]

This was, of course, the solution, but leads me to wonder why two instances of NZBDrone are being started at boot on my server. One is definitely being started by upstart, but the other? No idea - I’ll need to do some searching. Thanks.

[benzo8]

OK, this is happening when Sonarr does an automatic update.

upstart creates:

john@MediaServer /etc % sudo start nzbdrone
nzbdrone start/running, process 24304
john@MediaServer /etc % ps -ef | grep rone
john     24304     1 99 16:12 ?        00:00:01 mono /opt/NzbDrone/NzbDrone.exe

After an automatic update (branch: develop, mechanism: Built-In) I’m left with:

john@MediaServer /etc % ps -ef | grep rone
john     19968     1  9 16:07 ?        00:00:12 /usr/local/bin/mono /opt/NzbDrone/NzbDrone.exe --nobrowser
john     24304     1 99 16:09 ?        00:00:01 mono /opt/NzbDrone/NzbDrone.exe

[markus101]

Try disabling respawn in the upstart config. There is some more info in this thread:

Upgrade fails due to permissions issue

Removing respawn would be worth testing. CP does use forks when the app starts to run as a daemon, but thats not support on Windows or in .net, so we can’t do something similar, they may also do updates via git pull. SAB has never had auto update, have they? isn’t it service stop nzbdrone? You can now have a script that performs the update, which can be set on the general settings page, the script will have to take care of stopping/copying/starting. The built in update won’t handle this au…

[benzo8]

OK, I’ve commented out:

 respawn

in /etc/init/nzbdrone.conf and restarted the service under upstart so that should be the state now. I’ll confirm what happens after the next update.

[benzo8]

With the update overnight to 2.0.0.2183, I didn’t get a second instance of NZBDrone running, so it definitely looks like the respawn configuration command was the issue. (I note it’s already commented out on the wiki…)

Thanks, as always, for your time Markus…