Mythbackend not shutting down correctly

[newbury@…]

The systemd mythbackend.service unit uses ExecStartPre?=/usr/local/bin/pre-start.sh

The pre-start.sh script does not check to determine if there is already a running mythbackend process and allows the start of a new duplicate process. This is a bug.

Adding this to the start of the script will ensure a clean start.

# kill any running mythbackend process. if [ -e /var/run/mythtv/mythbackend.pid ]; then

killall mythbackend;

fi

(Borrowed from the sysv init mysqld startup script)

[Raymond Wagner]

Is this actually a MythTV problem? The only two init scripts we host are ones in the Gentoo and rpm sections of the packaging repo, and neither of them seem to line up with what you're talking about. What file needs to be changed?

[Raymond Wagner]

Reported problem is in some code that does not exist anywhere in our source tree.

[beirdo]

Seems that the actual issue is that mythbackend won't shut down cleanly for him, and seems (at first glance) to be perhaps related to checking if a recording is damaged, keeping TVRec from shutting down.

From the follow-on discussion on the mailing list (by Karl Dietz)

here's a backtrace ​http://paste.ubuntu.com/794362/

mythbackend is keeping one cpu busy at that point in time and the recordings view in mythweb shows one recording from yesterday as still running, but no recorder is in use...

MythTV Version: v0.25pre-3937-g0297b3a => December 23rd, time to update?

MythTV Branch : master

[beirdo]

Backtrace

[danielk]

What is the signal being sent to the backend? Is the backend actually recording when the signal is sent or not?

[danielk]

No reply in 5 weeks.