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

[Mic Bowman]

I have the same freeze at times. In my case there's a gdb process
running that I can kill off to terminate the simulator.

Regarding 9323... I just upgraded this morning and restarted my most
script-rich region several times without the crash (using the patch I
had posted on the mantis entry). Not that it actually means anything
that I can't reproduce it today given the timing nature. If you are
running your simulator in a screen process, turn on logging and post
the mono error on the mantis. I'll take a look at it.

--mic


On Mon, Apr 27, 2009 at 6:33 AM, John Hopkin
<opensim at jfhopkin.karoo.co.uk> wrote:
> 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
>>>>
>>>> _______________________________________________
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>>>> Opensim-users at lists.berlios.de
>>>> https://lists.berlios.de/mailman/listinfo/opensim-users
>>>>
> --
> John Hopkin
>
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