Unexpected Application pool failure: A failure was encountered while launching the process serving the application pool. The application pool has been disabled.

Unexpected_Application_pool_failure__A_failure_was_encountered_while_launching_the_process_serving_the_application_pool__The_application_pool_has_been_disabled__3_Rule.Monitor (UnitMonitor)

Knowledge Base article:

Summary

The application pool has been automatically stopped.

Causes

A failure was encountered while launching the worker process for the application pool.

Resolutions

Look in the Application event log for events and information related to the application pool failure. The Application event log can be viewed through the Event Viewer snap-in which can be found in the Computer Management console. The following task will start the Computer Management console:

Start Computer Management Console

Element properties:

Target

Microsoft.Windows.InternetInformationServices.2003.ApplicationPool

Parent Monitor

System.Health.ConfigurationState

Category

StateCollection

Enabled

True

Alert Generate

True

Alert Severity

Warning

Alert Priority

Low

Alert Auto Resolve

True

Monitor Type

Microsoft.Windows.SingleEventLogManualReset2StateMonitorType

Remotable

True

Accessibility

Public

Alert Message

Unexpected Application pool failure A failure was encountered while launching the process serving the application pool The application pool has been disabled

{0}

RunAs

Default

Comment

Mom2005ID='{CF11F6BD-FA4A-48CB-BB24-78152D80F61A}'

Source Code:

<UnitMonitor ID="Unexpected_Application_pool_failure__A_failure_was_encountered_while_launching_the_process_serving_the_application_pool__The_application_pool_has_been_disabled__3_Rule.Monitor" Comment="Mom2005ID='{CF11F6BD-FA4A-48CB-BB24-78152D80F61A}'" Accessibility="Public" Enabled="onEssentialMonitoring" Target="Microsoft.Windows.InternetInformationServices.2003.ApplicationPool" ParentMonitorID="SystemHealth!System.Health.ConfigurationState" Remotable="true" Priority="Normal" TypeID="Windows!Microsoft.Windows.SingleEventLogManualReset2StateMonitorType" ConfirmDelivery="false">

  <Category>StateCollection</Category>

  <AlertSettings AlertMessage="Unexpected_Application_pool_failure__A_failure_was_encountered_while_launching_the_process_serving_the_application_pool__The_application_pool_has_been_disabled__3_Rule.Monitor.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Low</AlertPriority>

    <AlertSeverity>Warning</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/EventDescription$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="ManualReset" MonitorTypeStateID="ManualResetEventRaised" HealthState="Success"/>

    <OperationalState ID="ConfigError" MonitorTypeStateID="EventRaised" HealthState="Warning"/>

  </OperationalStates>

  <Configuration>

    <ComputerName>$Target/Host/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

    <LogName>System</LogName>

    <Expression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery>EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value>1059</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery>PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value>W3SVC</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery>Params/Param[1]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value>$Target/Property[Type="IISCommon!Microsoft.Windows.InternetInformationServices.ApplicationPool"]/PoolID$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </Expression>

  </Configuration>

</UnitMonitor>