Dialog module issues - sr-dev

13 Sep 2023

Hi Kamailians!

Benoît and I have discovered multiple issues we think is related to our use of the Dialog
module with DMQ replication. We’ve seen enourmous spikes where SHM memory is quickly
consumed to the top limit and Kamailio core dump. We see stuff left in databases that
should have been deleted and a few other issues. The crashes worries me most. It could be
our signalling pattern or something else that leads to a state where we can’t rely on the
the “number of active dialogs” stats.

If any other developer recognize this, or has recently dived into the deep inner workings
of Dialog I’ll be happy to have a brainstorm. If not, I’m going to have to take a deep
breath and try to figure it out… :-)

At this point we can’t replicate it. We’re going to try hard doing that so that we can
assure that any fixes applied will actually work.

Regardless if we have some bad routing, nothing should be able to crash a running Kamailio
and eat up memory in an uncontrolled way, so there must be a problem in the code
somewhere.

I’ll start parsing the logs… 

Cheers,
/O