[Mono-devel-list] Npgsql - null reference exception during opening connection

[Jaroslaw Kowalski]

See this bug:

http://bugzilla.ximian.com/show_bug.cgi?id=58558

Looks like a major problem with appdomains.

Jarek

----- Original Message ----- 
From: "Francisco Figueiredo Jr." <fxjrlists at yahoo.com.br>
To: "Kamil Skalski" <nazgul at omega.pl>
Cc: <mono-devel-list at lists.ximian.com>
Sent: Wednesday, May 19, 2004 3:32 AM
Subject: Re: [Mono-devel-list] Npgsql - null reference exception during
opening connection


> Kamil Skalski wrote:
> > I've encountered an exception during opening of NpgsqlConnection. The
stack
> > trace is following:
> >
> > sql.n:17:9: debug: System.NullReferenceException: A null value was found
where
> > an object instance was required.
> > in (unmanaged) /usr/lib/libmono.so.0(mono_class_from_name+0xd7)
[0x4011c2a8]
> > in (unmanaged) /usr/lib/libmono.so.0 [0x400eb9a3]
> > in (unmanaged) /usr/lib/libmono.so.0 [0x400edbcf]
> > in (unmanaged) /usr/lib/libmono.so.0 [0x400ee2eb]
> > in <0x00066> System.Net.Dns:GetHostByName (string)
> > in <0x00032> System.Net.Sockets.TcpClient:Connect (string,int)
> > in <0x00026> System.Net.Sockets.TcpClient:.ctor (string,int)
> > in <0x00080> Npgsql.NpgsqlClosedState:Open (Npgsql.NpgsqlConnection)
> > in <0x00662> Npgsql.NpgsqlConnection:Open ()
> > in <0x0004f> (wrapper remoting-invoke-with-check)
Npgsql.NpgsqlConnection:Open
> > ()
> >
> > my connection string is
> > "Server=localhost;Database=test;User ID=postgres;Password=sql;"
> >
> > The starngest thing is that I have another application, where exactly
the same
> > connection string succedes and I can query database without problem. I'm
not
> > yet able to find any related differences between those two application -
> > there is no network / database specific code at all in them.
> > I also tried Server=127.0.0.1 but the behavior is identical - I've one
> > application succesfully opening connection and other failing.
> >
> > I'm still trying to reproduce behavior in some small example, but maybe
> > anybody has any suggestions?
> >
>
>
> Hi Kamil.
>
> I'm also getting this behavior when runing nunit-tests. I still don't
> know why this is happening too. Please, if you find something about it,
> let me know.
>
>
> -- 
> Regards,
>
> Francisco Figueiredo Jr.
> Membro Fundador do Projeto MonoBrasil - MonoBrasil Project Founder Member
> http://monobrasil.softwarelivre.org
>
>
>
> -------------
> "Science without religion is lame;
> religion without science is blind."
>
>                    ~ Albert Einstein
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