Re: [Netcommon-developer] Common.Logging: : Input string was not in a correct format

[Stephen B. <sb...@gm...>]

I am nearly certain that this issue is coming from Log4Net rather than
Common.Logging.  Assuming this email contains your full stack trace, you
can see this too by noting the root exception seems to originate from
log4net.ObjectRenderer.RendererMap.FindAndRender(Object
obj, TextWriter writer).

IIRC in Log4Net the { } characters are used as replacement tokens in log
message formatting strings and so are probably either reserved entirely or
need to be escaped.  Common.Logging isn't doing any 'processing' of the log
messages, merely passing them off to whatever logging framework you're
using so I'd start there.  The simplest way to confirm this would probably
be to try to wire up log4net to a test class of your own and forcibly try
to process a log message like...

log.Debug(m => m("this is a test with some { and } characters"));

...and see if log4net can handle that 'natively' using your same log4net
configuration/logging format settings.

Let us know if this helps~!

-Steve B.

Steve Bohlen
sb...@gm...
http://blog.unhandled-exceptions.com
http://twitter.com/sbohlen



On Fri, Dec 14, 2012 at 5:13 AM, Peter Kirk <pk...@al...> wrote:

>  Hi, I am using common.logging (with log4net 1.2.10). Sometimes, when I
> try to log a string which I received from an external service, the logging
> system throws an exception. I am not sure if the exception originates from
> common.logging or log4net. ****
>
> ** **
>
> For example, I do:****
>
> string s = service.GetName();****
>
> log.Debug(m => m("servicename=" + s));****
>
> ** **
>
> It appears this exception occurs because the string contains ‘{‘ and/or
> ‘}’ characters. Can this be correct? (Maybe the name I get is
> "Service81{loc17}").****
>
> ** **
>
> <log4net.Error>Exception rendering object type
> [Common.Logging.Factory.AbstractLogger+FormatMessageCallbackFormattedMessage]<stackTrace>System.FormatException:
> Input string was not in a correct format.****
>
>    at System.Text.StringBuilder.AppendFormat(IFormatProvider provider,
> String format, Object[] args)****
>
>    at System.String.Format(IFormatProvider provider, String format,
> Object[] args)****
>
>    at
> Common.Logging.Factory.AbstractLogger.FormatMessageCallbackFormattedMessage.FormatMessage(String
> format, Object[] args)****
>
>    at
> Alpha.Portal.ServiceAccess.Search.<>c__DisplayClass6.<AllContent>b__5(FormatMessageHandler
> m)****
>
>    at
> Common.Logging.Factory.AbstractLogger.FormatMessageCallbackFormattedMessage.ToString()
> ****
>
>    at log4net.ObjectRenderer.DefaultRenderer.RenderObject(RendererMap
> rendererMap, Object obj, TextWriter writer)****
>
>    at log4net.ObjectRenderer.RendererMap.FindAndRender(Object obj,
> TextWriter writer)</stackTrace></log4net.Error>****
>
> ** **
>
> Thanks for any comments,****
>
> Peter****
>
>
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