[omniORB] Back on the list again...

[Sai-Lai Lo]

Helmut,

Can you tell me the particulars of your platform, (compiler, c library
version, os version)?

When you say "shutdown", how do you go about doing that? Do you use the BOA
shutdown and destroy? 

2.8.0 has fixed a well hidden race condition in the idle connection code,
you may want to upgrade to it at some stage.

Sai-Lai


>>>>> Helmut Swaczinna writes:

> Hi everybody,
> before im going to talk about our current problem let me say some positiv
> words:

> Our real complex program system based on omniORB 2.7.1 under Linux works
> now in a real-life, commercial environement since several months. It runs
> nigth and day, week for week without any crash or the need to shutdown.

> Now the "but":

> When it is necessary to shutdown the omniORB-processes (e.g. for
> configuration 
> tasks) after *some weeks* the system shows a very strange behaviour. The 
> systemload increases to an exorbitant value. It is nearly impossible to 
> execute a command on the console. Shuting down the processes takes up to an
> hour on a quit fast machine. Normaly it takes a few seconds. The heavy
> systemload is caused by a *very* high traffic rate on the loopback-device. 
> There are some hundred million packets delivered during shutdown. During
> normal operation there are some million per week. This traffic must be located
> in the omniORB-library. There are no extra method-invokations or upcalls in 
> the user-code. 

> The system consists of 12 omniORB-processes each with about 10 threads
> running on one machine. All are combined client/server-processes. The
> processes are startet with -ORBinConScanPeriod 0 ans -ORBoutConScanPeriod 0.
> Scanning for idle-connections makes the system get instable.

> Can somebody explain this strange behaviour to me?

-- 
Sai-Lai Lo                                   S.Lo@uk.research.att.com
AT&T Laboratories Cambridge           WWW:   http://www.uk.research.att.com 
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