Elmah not working with asp.net site

80
votes

I've tried to use elmah with my asp.net site but whenever I try to go to http://localhost:port/elmah.axd I get resource not found exception. My web.config is given below.

    <?xml version="1.0"?>
    <configuration>
      <configSections>
        <sectionGroup name="elmah">
          <section name="security" requirePermission="false" 
                  type="Elmah.SecuritySectionHandler, Elmah"/>
          <section name="errorLog" requirePermission="false" 
                  type="Elmah.ErrorLogSectionHandler, Elmah" />
          <section name="errorMail" requirePermission="false" 
                  type="Elmah.ErrorMailSectionHandler, Elmah" />
          <section name="errorFilter" requirePermission="false" 
                  type="Elmah.ErrorFilterSectionHandler, Elmah"/>
        </sectionGroup>
      </configSections>
      <elmah>
        <security allowRemoteAccess="0" />
        <errorLog type="Elmah.SqlErrorLog, Elmah" 
                 connectionStringName="elmah-sql" />
        <errorMail
                from="my@account"
                to="myself"
                subject="ERROR From Elmah:"
                async="true"
                smtpPort="587"
                smtpServer="smtp.gmail.com"
                userName="my@account"
                password="mypassword" />
      </elmah>

      <connectionStrings>
        <add name="elmah-sql" connectionString="data source=(sqlserver); 
               database=elmahdb;
             integrated security=false;User ID=user;Password=password"/>
      </connectionStrings>
      <system.web>
        <compilation debug="true">
          <assemblies>
            <add assembly="Elmah, Version=1.0.10617.0, Culture=neutral, 
               PublicKeyToken=null"/>
          </assemblies>
        </compilation>
        <authentication mode="Windows"/>

        <httpHandlers>
          <remove verb="*" path="*.asmx"/>
          <add verb="*" path="*.asmx" validate="false" 
            type="System.Web.Script.Services.ScriptHandlerFactory, 
               System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                  PublicKeyToken=31BF3856AD364E35"/>
          <add verb="*" path="*_AppService.axd" validate="false" 
               type="System.Web.Script.Services.ScriptHandlerFactory, 
               System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                   PublicKeyToken=31BF3856AD364E35"/>
          <add verb="GET,HEAD" path="ScriptResource.axd" 
                 type="System.Web.Handlers.ScriptResourceHandler, 
               System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                    PublicKeyToken=31BF3856AD364E35" validate="false"/>
        </httpHandlers>
        <httpModules>
          <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, 
                System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                PublicKeyToken=31BF3856AD364E35"/>
        </httpModules>
      </system.web>

      <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
        <modules runAllManagedModulesForAllRequests="true">
          <remove name="ScriptModule"/>
          <add name="ScriptModule" preCondition="managedHandler" 
                type="System.Web.Handlers.ScriptModule, 
               System.Web.Extensions, Version=3.5.0.0, Culture=neutral, 
                 PublicKeyToken=31BF3856AD364E35"/>
          <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah"/>
          <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
          <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah"/>
        </modules>

        <handlers>
          <remove name="WebServiceHandlerFactory-Integrated"/>
          <remove name="ScriptHandlerFactory"/>
          <remove name="ScriptHandlerFactoryAppServices"/>
          <remove name="ScriptResource"/>
          <add name="ScriptHandlerFactory" verb="*" path="*.asmx" 
                preCondition="integratedMode" 
               type="System.Web.Script.Services.ScriptHandlerFactory, 
                    System.Web.Extensions, Version=3.5.0.0, 
               Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add name="ScriptHandlerFactoryAppServices" verb="*" 
            path="*_AppService.axd" preCondition="integratedMode" 
               type="System.Web.Script.Services.ScriptHandlerFactory, 
                 System.Web.Extensions, Version=3.5.0.0, 
               Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add name="ScriptResource" preCondition="integratedMode" 
            verb="GET,HEAD" path="ScriptResource.axd" 
               type="System.Web.Handlers.ScriptResourceHandler, 
            System.Web.Extensions, Version=3.5.0.0, 
               Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add name="Elmah" verb="POST,GET,HEAD" path="elmah.axd" 
                       preCondition="integratedMode" 
               type="Elmah.ErrorLogPageFactory, Elmah"/>
        </handlers>
      </system.webServer>
    </configuration>

EDIT: Elmah = (Error Logging Modules and Handlers)
http://code.google.com/p/elmah/

7
asp.netexception-handlingelmah
Aman: You are assuming everyone knows what is ELMAH. I have edited the question to provide the link. Correct it, if it is not the case. - shahkalpesh
I guess you might have to register the handler/module at IIS level, I guess for it to work. - shahkalpesh
See if this helps - msdn.microsoft.com/en-us/library/aa479332.aspx - shahkalpesh
Thanks @shahkalpesh. I'm really overwhelmed with work! Though I thought this question may help others also and made it community wiki. - TheVillageIdiot
Weird but I tried the suggestions with no luck! Worst, when I tried to access elmah.axd, the IIS hangs. - user591509

7 Answers

153
votes

I just had a similar problem with Elmah not working in an IIS7 deployment. I found that I needed to register the Elmah Modules and Handlers in system.web AND system.webServer:

<system.web>
...
  <httpHandlers>
    ...
    <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
    ...
  </httpHandlers>
  <httpModules>
    ...
    <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
    <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
    <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />
    ...
  </httpModules>
  ...
</system.web>
<system.webServer>
  ...
  <modules runAllManagedModulesForAllRequests="true">
    ...
    <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
    <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
    <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />
    ...
  </modules>
  <handlers>
    ...
    <add name="Elmah" verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
    ...
  </handlers>
<system.webServer>
120
votes

You may be need this one also

<elmah>
    <security allowRemoteAccess="1" />
</elmah>

when you get

403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied.

28
votes

Try registering the Modules and Handlers in the sections "httphandlers" and "httpmodules" in the <system.web> section: 

    <httpHandlers>
      ......
    <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah"/>
      .....

    </httpHandlers>
    <httpModules>
        .......
        <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah"/>
        <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
        <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah"/>
       .......
    </httpModules>
12
votes

One way to get around it today is to use nuget.

Visual studio:menu->tools->library package manager->package manager console 

install-package elmah

HTH

12
votes

This line was missing when I installed using NuGet (VS 2013, IIS 8.0):

<system.webServer>
  <handlers>
    <add name="Elmah" verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
 </handlers>
</system.webServer>

Adding it solved the 404 error problem.

9
votes

The nuget package does not add the following important lines to web.config resulting in 403 error.

<configuration>
  <elmah>  
    <security allowRemoteAccess="1" />
    <errorLog type="Elmah.XmlFileErrorLog, Elmah" logPath="~/app_data/elmah" />
  </elmah>
</configuration>

Also you may want to restrict the access to error logs by 

<add name="Elmah" verb="POST,GET,HEAD" path="/admin/elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" resourceType="Unspecified" requireAccess="Script" preCondition="integratedMode" />
0
votes

if you are using Areas make sure that you have updated one of the appsetting key

Default 

<add key="elmah.mvc.route" value="elmah" />

If you are an area as Admin

<add key="elmah.mvc.route" value="admin/elmah" />