AW: [Spread-users] Send_new_packets: created packet 25 already ex ist 2

[Schroeder, Heiko, ADBM62]

We increased MAX_SESSION_MESSAGES to 5000 as we had
a few problems with applications not responding fast
enough during high load peaks.

Additionally, the group timeout parameters were divided by 
5 (it's a 100MBit/s LAN setup and we need a faster response
in case of node failures).

I just recognized that there was a "Configuration" message
just before the failure without a real change in the configuration
(i.e. the listed hosts were the same). Perhaps this is part
of the problem?

What I'm really concerned with is that our applications received
corrupted data when (or most probably: just before) this error
occured.

CU

   Heiko


PS:
I forgot to mention the spread version: we use 3.17.3 with
the patch for the buffer overflow in groups.c.


> -----Ursprüngliche Nachricht-----
> Von: Ryan Caudy [mailto:rcaudy at gmail.com] 
> Gesendet: Freitag, 20. Mai 2005 00:28
> An: Schroeder, Heiko, ADBM62
> Cc: spread-users at lists.spread.org
> Betreff: Re: [Spread-users] Send_new_packets: created packet 
> 25 already exist 2
> 
> 
> This message is triggered if the protocol layer tries to send an
> outgoing message, with a sequence number X such that 25 = X mod 8192,
> and the slot for 25 is already filled with a packet that has been
> delivered (2).
> 
> I would consider it to be a pretty serious error.
> 
> Have you changed any of the parameters (#defines) for Spread?
> 
> --Ryan
> 
> On 5/19/05, Schroeder, Heiko, ADBM62 <heiko.schroeder at eads.com> wrote:
> >  
> > Hi, 
> >   
> > we recently received the above error message from spread. 
> >   
> > Unfortunately, I don't have much information about the 
> > cicumstances that lead to the error. The system was running 
> > without problems for some time before the problem occured 
> > and the error didn't show up again. So, it doesn't seem to be 
> > something specific to our setup. 
> >   
> > It seems, that corrupted data was sent by spread when this 
> > error happened, too. 
> >   
> > Has anybody perhaps seen this error before? 
> >   
> > CU 
> >   
> >    Heiko 
> >   
> >   
> >   
> > -- 
> > Heiko Schröder
> > EADS Deutschland GmbH
> > Defence and Communication Systems
> > Naval Combat Systems (ADBM62)
> > Bontekai 55
> > 26382 Wilhelmshaven - Germany
> > Tel: +49 44 21.15 43-230
> > Fax: +49 44 21.15 43-111
> > e-Fax: +49 731.392-20 91 11
> > heiko.schroeder at eads.com 
> >   
> > www.eads.com
> >  
> >   
> > _______________________________________________
> > Spread-users mailing list
> > Spread-users at lists.spread.org
> > http://lists.spread.org/mailman/listinfo/spread-users
> > 
> > 
> >
>