[Opensim-users] Ubuntu and magic mini-trampolines (crash problem)

[John Hopkin]

I'm still getting the problem in r9323, although OpenSim.exe now
freezes rather than returning to the command line, and needs "kill -9"
to terminate it.

John Hopkin wrote:

>Thanks, Mic.  I've put a monitor on that mantis, and I'll upgrade when
>the patch comes through.  It's not a killer problem - if I can get the
>sim up, which can take a couple of tries, it seems to stay up pretty
>well, with only one crash so far during normal running, which was
>during a border crossing.
>
>John
>
>Mic Bowman wrote:
>
>>there is a mantis for this (3237)...
>>
>>i've been going through the various script engine calls to log4net and
>>commenting them out to get rid of the problem. two in particular
>>seemed to help. i'll put up another patch on that mantis in the next
>>couple days.
>>
>>the problem comes and goes. i've tried various combinations of mono
>>threads, debug/release builds, and even rebuilt log4net. the more
>>scripts i have in a region that is restarting, the more likely the
>>problem occurs. there is clearly a race condition somewhere in the
>>mono 2.2 and 2.4 internals which opensim is tweaking.
>>
>>--mic
>>
>>
>>On Wed, Apr 22, 2009 at 6:09 PM, John Hopkin
>><opensim at jfhopkin.karoo.co.uk> wrote:
>>> Thanks.  I'll try that.  At the moment, it's working OK - it seems to
>>> be intermittent, whereas before it was during each bootup.  If/when it
>>> happens again, I'll drop that value.
>>>
>>> John
>>>
>>> Snoopy Pfeffer wrote:
>>>
>>>>I have experienced the same when MONO_THREADS_PER_CPU is set to a very high number. 500 works for me.
>>>>
>>>>  Snoopy Pfeffer
>>>>
>>>>
>>>>
>>>>
>>>>________________________________
>>>>From: John Hopkin <opensim at jfhopkin.karoo.co.uk>
>>>>To: opensim-users at lists.berlios.de
>>>>Sent: Thursday, April 23, 2009 1:50:37 AM
>>>>Subject: [Opensim-users] Ubuntu and magic mini-trampolines (crash problem)
>>>>
>>>>I've just upgraded Mono from 2.1 to 2.2 under Ubuntu Hardy, using Dr
>>>>Scofield's script from here:
>>>>
>>>>http://xyzzyxyzzy.net/2009/02/17/updated-mono-build-script-mono-22/
>>>>
>>>>and all went smoothly with that.
>>>>
>>>>But now, when I run OpenSim.exe, it loads OK at first, but then I get
>>>>the error:
>>>>
>>>><start paste>
>>>>Region (root) # 0x18 0x0 0x0 0x55 0x8b 0xec 0x57 0x56 0x83 0xec 0x20
>>>>0x8b 0x75 0x8 0x83 0xec 0x8 0x56 0x68 0x10 0x75 0xe8 0x9c 0x8b 0x5
>>>>0x10 0x75 0xe8 0x9c 0xff 0x50 0x34
>>>>**
>>>>ERROR:mini-trampolines.c:122:mono_magic_trampoline: assertion failed:
>>>>(vt)
>>>>Stacktrace:
>>>>
>>>>  at log4net.LogManager.WrapLogger (log4net.Core.ILogger) <0xffffffff>
>>>>  at log4net.LogManager.WrapLogger (log4net.Core.ILogger) <0x0001d>
>>>><end paste>
>>>>
>>>>and a long stacktrace.  The server crashes, of course.  Presumably,
>>>>the references to magic mini-trampolines are within the code; I don't
>>>>have any scripts or objects that I'm aware of like that.
>>>>
>>>>Vital stats:
>>>>
>>>>* OpenSim revision 9205 (binary package from OSGrid)
>>>>* Ubuntu Intrepid, kernel 2.6.27-11-generic
>>>>* Mono run with MONO_THREADS_PER_CPU set to 2000
>>>>* 7 regions run by one OpenSim.exe
>>>>*  P4/3.6GHz, 2GB RAM, more than adequate (or were under Mono 2.1)
>>>>* UGAIM through OSGrid
>>>>* MySQL 14.12
>>>>
>>>>I'm completely at a loss as to what could be causing this.  Does
>>>>anyone have any ideas?
>>> --
>>> John Hopkin
>>>
>>> _______________________________________________
>>> Opensim-users mailing list
>>> Opensim-users at lists.berlios.de
>>> https://lists.berlios.de/mailman/listinfo/opensim-users
>>>
-- 
John Hopkin