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failure Element for applicationPoolDefaults for applicationPools [IIS Settings Schema]

IIS 7.0

NoteNote:

For more information about the failure element, see the following topic on the Microsoft IIS.net Web site: Failure Settings for an Application Pool <failure>.

Defines the actions to take when an application pool fails.

The following sections describe attributes, child elements, and parent elements for this section.

Attributes

Attribute

Description

autoShutdownExe

Optional string attribute.

Specifies an executable to run when the WWW service shuts down an application pool. You can use the autoShutdownParams attribute to send parameters to the executable.

autoShutdownParams

Optional string attribute.

Specifies command-line parameters for the executable that is specified in the autoShutdownExe attribute.

loadBalancerCapabilities

Optional enum attribute.

Specifies behavior when a worker process cannot be started, such as when the request queue is full or an application pool is in rapid-fail protection. The loadBalancerCapabilities attribute can be one of the following possible values. The default value is HttpLevel.

ValueDescription
HttpLevelSpecifies that a 503 error code has been returned. Load balancers that are not HTTP aware will not switch to a different node because the 503 response tells the load balancer that the computer is healthy.The numeric value is 2.
TcpLevelSpecifies that the TCP connection will terminate. This is useful when you use a load balancer that is not HTTP aware.The numeric value is 1.

orphanActionExe

Optional string attribute.

Specifies an executable to run when the WWW service orphans a worker process (if the orphanWorkerProcess attribute is set to true). You can use the orphanActionParams attribute to send parameters to the executable.

orphanActionParams

Optional string attribute.

Indicates command-line parameters for the executable named by the orphanActionExe attribute. To specify the process ID of the orphaned process, use %1%.

orphanWorkerProcess

Optional Boolean attribute.

Specifies whether to assign a worker process to an orphan state instead of terminating it when an application pool fails.

The default value is false.

rapidFailProtection

Optional Boolean attribute.

Setting to true instructs the WWW service to remove from service all applications that are in an application pool when:

  • The number of worker process crashes has reached the maximum specified in the rapidFailProtectionMaxCrashes attribute.

  • The crashes occur within the number of minutes specified in the rapidFailProtectionInterval attribute.

The default value is true.

rapidFailProtectionInterval

Optional timeSpan attribute.

Specifies the number of minutes before the failure count for a process is reset.

The default value is 00:05:00 (five minutes).

rapidFailProtectionMaxCrashes

Optional uint attribute.

Specifies the maximum number of failures allowed within the number of minutes specified by the rapidFailProtectionInterval attribute.

The default value is 5.

Child Elements

None.

Parent Elements

Element

Description

configuration

Specifies the root element in every configuration file that is used by IIS 7.

system.applicationHost

Specifies the root element for configuring Web process settings.

applicationPools

Specifies application pool definitions on a server.

applicationPoolDefaults

Specifies default settings for all application pools on a server.

For more information about the failure element, see the following topic on the Microsoft IIS.net Web site: Failure Settings for an Application Pool <failure>.

This element can be declared in ApplicationHost.config only. Any attempt to declare it in a configuration file at a different level in the hierarchy causes an error and a resultant error message.

Configuration locations

ApplicationHost.config

Requirements

Microsoft Internet Information Services (IIS) version 7.0

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