Default Trace Failed Requests Logging for a Site <traceFailedRequestsLogging>


The <traceFailedRequestsLogging> element of the <siteDefaults> element sets the failed request tracing options for all sites, such as the directory for failed request tracing log files, the maximum number of failed request tracing log files, and whether failed request tracing is enabled.

Note: If the <traceFailedRequestsLogging> element is configured in both the <siteDefaults> section and in the <site> section for a specific site, the configuration in the <site> section is used for that site.

Note: The <traceFailedRequestsLogging> element specifies the global-level options for failed request tracing, but the <system.webServer/tracing/traceFailedRequests> element specifies failed request tracing rules.


Version Notes
IIS 7.5 The <traceFailedRequestsLogging> element was not modified in IIS 7.5.
IIS 7.0 The <traceFailedRequestsLogging> element of the <siteDefaults> element was introduced in IIS 7.0.
IIS 6.0 N/A


After you finish the default installation of IIS 7, you must install the tracing role service to use failed request tracing. After you install the role service, you still must enable failed request tracing at the site level, application level, or directory level.

Windows Server 2008 or Windows Server 2008 R2

  1. On the taskbar, click Start, point to Administrative Tools, and then click Server Manager.
  2. In the Server Manager hierarchy pane, expand Roles, and then click Web Server (IIS).
  3. In the Web Server (IIS) pane, scroll to the Role Services section, and then click Add Role Services.
  4. On the Select Role Services page of the Add Role Services Wizard, select Tracing, and then click Next.

  5. On the Confirm Installation Selections page, click Install.
  6. On the Results page, click Close.

Windows Vista or Windows 7

  1. On the taskbar, click Start, and then click Control Panel.
  2. In Control Panel, click Programs and Features, and then click Turn Windows Features on or off.
  3. Expand Internet Information Services, then World Wide Web Services, then Health and Diagnostics.
  4. Select Tracing, and then click OK.

How To

How to configure the site defaults for a server

  1. Open Internet Information Services (IIS) Manager:
    • If you are using Windows Server 2008 or Windows Server 2008 R2:
      • On the taskbar, click Start, point to Administrative Tools, and then click Internet Information Services (IIS) Manager.
    • If you are using Windows Vista or Windows 7:
      • On the taskbar, click Start, and then click Control Panel.
      • Double-click Administrative Tools, and then double-click Internet Information Services (IIS) Manager.
  2. In the Connections pane, expand the server name, then click the Sites node.
  3. In the server's Sites pane, click Set Web Site Defaults... in the Actions pane.
  4. In the Web Site Defaults dialog box, specify your default options for all Web sites, and then click OK.



Attribute Description
customActionsEnabled Optional Boolean attribute.

Specifies whether custom actions are enabled for failed request tracing.

The default value is false.
directory Optional string attribute.

Specifies the failed request trace logging directory for a site.

The default value is %SystemDrive%\inetpub\logs\FailedReqLogFiles.
enabled Optional Boolean attribute.

Specifies whether failed request trace logging is enabled for a site (true) or disabled (false).

The default value is false.
maxLogFiles Optional uint attribute.

Specifies the maximum number of failed request tracing log files to keep for the site.

The default value is 50.
maxLogFileSizeKB Optional uint attribute.

Specifies the maximum file size in kilobytes for failed request tracing logs.

Note: If failed request tracing logs exceed this value, IIS will truncate the logs at the maximum file size and specify LOG_FILE_MAX_SIZE_TRUNCATE for the trace event.

The default value is 512.

Child Elements


Configuration Sample

The following configuration sample specifies the default traceFailedRequestsLogging options for IIS 7.

         <traceFailedRequestsLogging enabled="true"
            maxLogFiles="20" />

Sample Code

The following code samples configure the default traceFailedRequestsLogging options for IIS 7.


appcmd.exe set config -section:system.applicationHost/sites /siteDefaults.traceFailedRequestsLogging.enabled:"True" /commit:apphost
appcmd.exe set config -section:system.applicationHost/sites /"%SystemDrive%\inetpub\logs\FailedReqLogFiles" /commit:apphost
appcmd.exe set config -section:system.applicationHost/sites /siteDefaults.traceFailedRequestsLogging.maxLogFiles:"20" /commit:apphost

Note: You must be sure to set the commit parameter to apphost when you use AppCmd.exe to configure these settings. This commits the configuration settings to the appropriate location section in the ApplicationHost.config file.


using System;
using System.Text;
using Microsoft.Web.Administration;

internal static class Sample
   private static void Main()
      using (ServerManager serverManager = new ServerManager())
         Configuration config = serverManager.GetApplicationHostConfiguration();
         ConfigurationSection sitesSection = config.GetSection("system.applicationHost/sites");
         ConfigurationElement siteDefaultsElement = sitesSection.GetChildElement("siteDefaults");

         ConfigurationElement traceFailedRequestsLoggingElement = siteDefaultsElement.GetChildElement("traceFailedRequestsLogging");
         traceFailedRequestsLoggingElement["enabled"] = true;
         traceFailedRequestsLoggingElement["directory"] = @"%SystemDrive%\inetpub\logs\FailedReqLogFiles";
         traceFailedRequestsLoggingElement["maxLogFiles"] = 20;



Imports System
Imports System.Text
Imports Microsoft.Web.Administration

Module Sample

   Sub Main()
      Dim serverManager As ServerManager = New ServerManager
      Dim config As Configuration = serverManager.GetApplicationHostConfiguration
      Dim sitesSection As ConfigurationSection = config.GetSection("system.applicationHost/sites")
      Dim siteDefaultsElement As ConfigurationElement = sitesSection.GetChildElement("siteDefaults")

      Dim traceFailedRequestsLoggingElement As ConfigurationElement = siteDefaultsElement.GetChildElement("traceFailedRequestsLogging")
      traceFailedRequestsLoggingElement("enabled") = True
      traceFailedRequestsLoggingElement("directory") = "%SystemDrive%\inetpub\logs\FailedReqLogFiles"
      traceFailedRequestsLoggingElement("maxLogFiles") = 20

   End Sub

End Module


var adminManager = new ActiveXObject('Microsoft.ApplicationHost.WritableAdminManager');
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST";
var sitesSection = adminManager.GetAdminSection("system.applicationHost/sites", "MACHINE/WEBROOT/APPHOST");
var siteDefaultsElement = sitesSection.ChildElements.Item("siteDefaults");

var traceFailedRequestsLoggingElement = siteDefaultsElement.ChildElements.Item("traceFailedRequestsLogging");
traceFailedRequestsLoggingElement.Properties.Item("enabled").Value = true;
traceFailedRequestsLoggingElement.Properties.Item("directory").Value = "%SystemDrive%\\inetpub\\logs\\FailedReqLogFiles";
traceFailedRequestsLoggingElement.Properties.Item("maxLogFiles").Value = 20;



Set adminManager = WScript.CreateObject("Microsoft.ApplicationHost.WritableAdminManager")
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST"
Set sitesSection = adminManager.GetAdminSection("system.applicationHost/sites", "MACHINE/WEBROOT/APPHOST")
Set siteDefaultsElement = sitesSection.ChildElements.Item("siteDefaults")

Set traceFailedRequestsLoggingElement = siteDefaultsElement.ChildElements.Item("traceFailedRequestsLogging")
traceFailedRequestsLoggingElement.Properties.Item("enabled").Value = True
traceFailedRequestsLoggingElement.Properties.Item("directory").Value = "%SystemDrive%\inetpub\logs\FailedReqLogFiles"
traceFailedRequestsLoggingElement.Properties.Item("maxLogFiles").Value = 20

Deprecated Elements