[Mono-dev] Random mono apache errors

[Vladimir Dimitrov]

I got to this point in the sources too, but I have no idea what I can do 
or why didn't many other people got the same problem?

On 21.8.2013 г. 15:20 ч., Rafael Teixeira wrote:
> From sources 
> (https://github.com/mono/mono/blob/master/mcs/class/System.Web.Services/System.Web.Services.Protocols/SoapDocumentationHandler.cs):
>
>     if (key == "wsdl" || key == "schema" || key == "code" || key ==
>     "disco")
>
>     return;
>     #if NET_2_0
>     string help = WebServicesSection.Current.WsdlHelpGenerator.Href;
>
>     string path = Path.GetDirectoryName
>     (ConfigurationManager.OpenMachineConfiguration().FilePath);
>
>     #else
>     string help = WSConfig.Instance.WsdlHelpPage;
>
>     string path = Path.GetDirectoryName
>     (WSConfig.Instance.ConfigFilePath);
>
>     #endif
>     *...*
>
>     string physPath = Path.Combine (path, help);
>
>
> So probably WebServicesSection.Current.WsdlHelpGenerator.Href is 
> returning null or 
> ConfigurationManager.OpenMachineConfiguration().FilePath is returning 
> null.
>
> For the first case, as this is read from current configuration which 
> can be reread from time to time as any part of the configuration chain 
> changes it is possible that either some of those MonoTodos in 
> https://github.com/mono/mono/blob/master/mcs/class/System.Web.Services/System.Web.Services.Configuration/WsdlHelpGeneratorElement.cs?source=cc are 
> making things flaky:
>
> [MonoTODO ("probably verifies the Href property here, after 
> deserializing?")]
> protected override void DeserializeElement (XmlReader reader, bool 
> serializeCollectionKey)
>
> {
> base.DeserializeElement (reader, serializeCollectionKey);
>
> }
> [MonoTODO]
>
> protected override void Reset (ConfigurationElement parentElement)
>
> {
> base.Reset (parentElement);
>
> }
>
> or some locking is missing to avoid reading an incomplete current 
> configuration instance...
>
> As for the second case after much navigating through sources it comes 
> down to calling an internal call 'string get_machine_config_path ()' 
> which I don't have time now to try to explore...
>
> Hope it helps,
>
> Rafael Teixeira
> O..:.)oooo
>
>
> On Wed, Aug 21, 2013 at 8:05 AM, Vladimir Dimitrov 
> <vlad.dimitrov at gmail.com <mailto:vlad.dimitrov at gmail.com>> wrote:
>
>     Hey guys,
>
>     I have worked with mono for almost 7 years but I recently got
>     involved in a project that used mono web services and apache
>     together on Linux.
>
>     The problem is that as the load on the service started to rise we
>     started getting different errors which appear in random intervals.
>
>     One of the errors is described here:
>     https://bugzilla.novell.com/show_bug.cgi?id=522631 (not by me).
>     And attempting to fix it I added some configuration that caused
>     another error to appear once:
>     http://img577.imageshack.us/img577/4473/44in.png
>
>     The only common spot between the errors seem to be the
>     configuration. Looks like at some point it becomes invalid. This
>     sometimes happens after the service gets restarted, but sometimes
>     it happens while the service is running normally. A restart of
>     apache usually fixes the problem.
>
>     Does anybody else encountered something similar or have an idea
>     what can be the problem?
>
>     Thanks,
>      Vladimir
>
>
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