[omniORB] large messages -> WSAENOBUFS

[Duncan Grisby]

On Tuesday 17 September, "Renzo Tomaselli" wrote:

>     we just ported an OmniORB 3.04 based application to Windows XP SP1.
> Things run well except when large messages are involved (say 140 Mb for a
> practical failure). In such case socket send fails and winsock LastError
> reports WSAENOBUFS. And yes, before anybody asks, omniORB::MaxMessageSize
> was set pretty high.

[...]
> MSDN reports this as being a known bug for NT. They also suggest to set
> socket option SO_SNDBUF to 0 so that application buffer is used directly
> instead of making an internal transport stack copy. I don't know whether
> this affects performance, but it might be of intererest for the forthcoming
> 4.0 version.

I can't help thinking that it's a bad idea to send messages that big,
but anyway...

Can you try setting that socket option in omniORB, and see if it
helps?

Cheers,

Duncan.

-- 
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