[Mono-list] TypeLoadException with ASP.NET

Igor Shmukler igor.shmukler at gmail.com
Tue Jan 13 19:33:43 UTC 2015

Hello Andres,

I "agree" that a cryptic message is not the friendliest thing for a
programmer, such as myself. I should be coding, instead I am
pretending to be a system administrator. IMHO, what is a bug: "is in
the eye of the beholder." I would love it, if every project was
moderated according to your standards. :)

After a lot more digging, so I am delighted to share the few
additional insights.

I tried various apache2+mono configurations using mod_mono_auto and/or
mod_mono with manual site configuration. No matter what configuration
was selected, the default.aspx compiles then loading a type from a DLL
fails - otherwise, things look the same.
I tried running my code with XSP2, and got exactly the same output as
with apache2+mod_mono[_auto].

Finally, I tried XSP4 - the same server that Xamarin packaged for
XamarinStudio, which I use on my OSX laptop. XSP4 works.
[I quickly tried mono-apache-server4, but did not get it to work fast
enough. Perhaps, another pass at mono-server4 makes even more sense,


Igor Shmukler

On Tue, Jan 13, 2015 at 8:29 PM, Andrés G. Aragoneses <knocte at gmail.com> wrote:
> And when I say a "bug" I mean either a Mono bug, or a mod_mono bug.
> On 13 January 2015 at 19:29, Andrés G. Aragoneses <knocte at gmail.com> wrote:
>> Igor, a misconfiguration problem should never rise a cryptic
>> TypeLoadException. You're simply hitting a bug with your codebase. If you
>> keep reducing the testcase, you will be able to know where is the problem,
>> so you can open a more detailed bug report about it, or even fix it
>> yourself.
>> On 13 January 2015 at 10:01, Igor Shmukler <igor.shmukler at gmail.com>
>> wrote:
>>> Hi Andres,
>>> Thank you again
>>> >> I already know that my code runs fine [on Mac].
>>> >
>>> > With what web server?
>>> On Mac [OS X], I have been using XamarinStudio, which hosts on XSP4
>>> [at least by default]. XSP4 on Mac works great, but on Linux things
>>> are strange. I am totally perplexed.
>>> Do you think that is the proper assembly version? What do I do
>>> to find out what is wrong. Does mod_mono have a separate log
>>> somewhere? Does it make sense that apache2 error log shows no errors?
>>> >> What would running my code with XSP prove?
>>> >
>>> > It would give more info to pinpoint if it's a bug in mono's ASP.NET
>>> > stack,
>>> > or in mod_mono (which is a different codebase).
>>> Do you think that there is indeed a bug in a codebase? My guess is
>>> that something is funky with configuration. Obviously, I don't know
>>> what are the answers to my own questions. Hence, with that many
>>> variables, my guess is only "so" educated.
>>> Please advise.
>>> Sincerely,
>>> Igor Shmukler

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