From: Martin Hart <martin@...>
Date: 2004-01-16T05:10:09+09:00
Subject: Re: DRb and Exceptions when using DRbUndumped

On Thursday 15 January 2004 06:00, NAKAMURA, Hiroshi wrote:
> Hi,
>
> > From: "Martin Hart" <martin@zsdfherg.com>
> > Sent: Wednesday, January 14, 2004 3:41 AM
> >
> > Ideally I'd like the exception to be transported to the client and then
> > raised there - i do not want the connection to be closed.  Is that doable
> > or do I need to avoid the use of exceptions from my "exported" methods?
>
> Must be doable.  Can you post the code?
>
> Running ruby with -d option might help to know what is going on.
>

ok - first off I am using drb 2.0.4 with ruby 1.6.8

My tests have revealed the following....

raising a class that derives from ::Exception calls the server to close 
connection, but raising a class that derives from ArgumentError, TypeError, 
StandardError, etc does not.

to work around the problem all i had to do was change my exception classes to 
inherit from StandardError and not Exception.

I had a quick look through drb.rb and do in fact see that the drb code does 
not specifically "rescue Exception", and that appears to have been the cause 
of my problem.

I can post code to reproduce if you really want it - but now I have a 
workaround I am not all that worried (unless of course my diagnosis is 
incorrect :-)

thanks for your help anyway,

cheers
Martin

> Regards,
> // NaHi