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Application Pool worker process terminated unexpectedly

Microsoft.Windows.InternetInformationServices.6.2.Application.pool.worker.process.terminated.unexpectedly (Rule)

Knowledge Base article:

Summary

Web sites and Web applications depend on the availability of Internet Information Services (IIS) application pools. IIS application pools in turn depend on the Windows Process Activation Service (WAS). If WAS is not running or errors occur during the startup or shutdown of an application pool, Web sites and Web applications may not be available.

Resolutions

Possible resolutions include the following:

Use the Debug Diagnostics tool

To use the Debug Diagnostics tool, see the article How to use the Debug Diagnostics tool to troubleshoot an IIS process that stops unexpectedly.

Examine the event log message details for an error number

To examine the event log message details for an error number that can provide additional information:

Learn more about a specific error number

To learn more about a specific error number:

Element properties:

TargetMicrosoft.Windows.InternetInformationServices.6.2.ApplicationPool
CategoryAlert
EnabledTrue
Alert GenerateFalse
RemotableTrue

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.Windows.Server.IIS.6.2.WarningAndErrorEventProvider Default
Filter ConditionDetection Microsoft.Windows.InternetInformationServices.6.2.ApplicationPool.EventFilter Default
WA WriteAction Microsoft.Windows.Server.IIS.6.2.GenerateAlertAction.SuppressedByDescription Default

Source Code:

<Rule ID="Microsoft.Windows.InternetInformationServices.6.2.Application.pool.worker.process.terminated.unexpectedly" Enabled="true" Target="Microsoft.Windows.InternetInformationServices.6.2.ApplicationPool" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>Alert</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="Microsoft.Windows.Server.IIS.6.2.WarningAndErrorEventProvider">

      <LogName>System</LogName>

    </DataSource>

  </DataSources>

  <ConditionDetection ID="Filter" TypeID="Microsoft.Windows.InternetInformationServices.6.2.ApplicationPool.EventFilter">

    <Expression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery>EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value>5009</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">Microsoft-Windows-WAS</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </Expression>

  </ConditionDetection>

  <WriteActions>

    <WriteAction ID="WA" TypeID="Microsoft.Windows.Server.IIS.6.2.GenerateAlertAction.SuppressedByDescription">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.Windows.InternetInformationServices.6.2.Application.pool.worker.process.terminated.unexpectedly.AlertMessage"]$</AlertMessageId>

    </WriteAction>

  </WriteActions>

</Rule>