[omniORB] Array size limit

[Duncan Grisby]

On Wednesday 7 May, Klas Nordberg wrote:

> I'm testing how long time it takes to send large arrays of bytes
> (CORBA::Octet) between a server and client using omniORB CORBA by
> writing a client which sends 10^6 bytes to a server which just copies
> the received byte array to a local buffer.
> 
> On a linux platform this works fine, but when I tested to run the
> client on a Windows platform, I get a stack overflow runtime error
> (not an exception) from somewhere deep in the ORB.  When I decrease
> the size of the array, however, it works.  Apparently, there is a
> limit on the amount of data in an array which can be processed by the
> ORB.

The C++ mapping for arrays places the array on the stack, and you're
just running out of stack space. There's not a whole lot omniORB can do
about that. You can increase the stack size omniORB uses for each
thread, by setting the omni_thread::stacksize() static function, but
that will only make the problem occur at larger sizes.

A better idea is to use a sequence<octet>, since the C++ mapping puts
the data on the heap, and thus isn't limited to stack size.

Cheers,

Duncan.

-- 
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