[SR-Users] Segfault in dialog.so with 4.4.2 stable

[Dirk Teurlings - Signet B.V.]

On 07/18/2016 10:49 AM, Daniel-Constantin Mierla wrote:
> have you run with -x qm before reverting to 4.2?
No we didn't, as I didn't know what the effects would be, it's a live
server so we don't want to try changes before testing.

> Is the same config you run with 4.2 and 4.4?
Not at the moment, but we developed the new routes in 4.2 first, then
upgraded the testplatform to 4.4 without issues. Though the testplatform
is not identical in hardware to the live system, this looked promising.

> The version 4.2.8 has qm as default memory manager. In 4.4, fm is the
> default one but qm can be selected at startup with -x. The main
> difference is that qm has more safety checks for detecting double free
> and buffer overflows...
Right, that sounds very plausible then... Upgrading "back" to 4.4 now
will have to wait a bit, we don't want to experience the same issues
again. That being said, it's difficult to track what causes this exactly
if we can't reproduce it on the testplatform. Unfortunately I'm not at
liberty to try these things on the running servers.

Anyway, can I get any more information out of the backtraces to help
resolve this issue with the new memory manager as well? Or do you need
more info for that?

Cheers,
Dirk