Empty Target Group for Application Component Monitor

Microsoft.SystemCenter.Apm.ApplicationComponentGroup.EmptyApplicationComponentsMonitor (UnitMonitor)

Empty Target Group for Application Component Monitor checks for target groups that do not contain any servers hosting the applications.

Knowledge Base article:

Summary

The instance state becomes unhealthy if application components are scoped to an empty target group.

Causes

The .NET Application Performance Monitoring template lets you specify a target group that limits monitoring to members of that computer group. The target group can be set at the application group level, or specifically for individual application components through the customized settings dialog. If the target group is empty or does not contain any servers that host the application component, the application component will not be monitored.

Resolutions

This issue will resolve when you update the target group for the unhealthy application component to a computer group that contains servers hosting the application. To update the Target group to a valid computer group, use the Operations Console, go to the Authoring space and use the following steps:

Expand the Management Pack Templates node and select .NET Application Performance Monitoring.
Select the application group that is unhealthy, right-click and select Properties.
On the What to Monitor tab, select one of the application components that is unhealthy and click Customize.
Scroll to the Monitored servers section on the configuration page and verify the specified group contains servers that are hosting the application component.

Element properties:

Target

Microsoft.SystemCenter.ApplicationMonitoring.Net.ApplicationComponentGroup

Parent Monitor

System.Health.ConfigurationState

Category

ConfigurationHealth

Enabled

True

Alert Generate

True

Alert Severity

MatchMonitorHealth

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.Windows.2SingleEventLog2StateMonitorType

Remotable

True

Accessibility

Public

Alert Message

Empty Target Group for Application Component

The application components {1} included in {0} are scoped by target groups that do not contain any servers hosting the applications. These application components will not be monitored until the targeted group is updated to include servers that host the applications.

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.SystemCenter.Apm.ApplicationComponentGroup.EmptyApplicationComponentsMonitor" Accessibility="Public" Enabled="true" ParentMonitorID="Health!System.Health.ConfigurationState" Target="ApplicationMonitoring!Microsoft.SystemCenter.ApplicationMonitoring.Net.ApplicationComponentGroup" TypeID="Windows!Microsoft.Windows.2SingleEventLog2StateMonitorType" Remotable="true" Priority="Normal" ConfirmDelivery="false">

  <Category>ConfigurationHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SystemCenter.Apm.ApplicationComponentGroup.EmptyApplicationComponentsMonitor.AlertMessageResourceID">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Property[Type="ApplicationMonitoring!Microsoft.SystemCenter.ApplicationMonitoring.Net.ApplicationComponentGroup"]/ApplicationName$</AlertParameter1>

      <AlertParameter2>$Data/Context/DataItem/Params/Param[5]$</AlertParameter2>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Success" MonitorTypeStateID="SecondEventRaised" HealthState="Success"/>

    <OperationalState ID="Warning" MonitorTypeStateID="FirstEventRaised" HealthState="Warning"/>

  </OperationalStates>

  <Configuration>

    <FirstComputerName>.</FirstComputerName>

    <FirstLogName>Operations Manager</FirstLogName>

    <FirstExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">.NET app monitoring</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">34433</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[4]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Id$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </FirstExpression>

    <SecondComputerName>.</SecondComputerName>

    <SecondLogName>Operations Manager</SecondLogName>

    <SecondExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">.NET app monitoring</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">34416</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[4]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Id$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </SecondExpression>

  </Configuration>

</UnitMonitor>