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A domain controller has an extremely high number of replication partners

A_domain_controller_has_an_extremely_high_number_of_replication_partners (Rule)

Knowledge Base article:

Summary

This domain controller has an extremely high number of replication partners and is in danger of not being able to replicate in a timely fashion.

Review your directory replication design to decrease the number of replication partners for this domain controller.

Causes

This alert is commonly triggered by another domain controller failing, which causes the Knowledge Consistency Checker (KCC) to compute new optimal replication paths.

Resolutions

In this case, fix the failing domain controller and review your replication topology design to prevent future overloads in the event of a domain controller failure.

Element properties:

TargetMicrosoft.Windows.Server.2003.AD.DomainControllerRole
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableFalse
Alert Message
A domain controller has an extremely high number of replication partners
{0}
Event LogOperations Manager

Member Modules:

ID Module Type TypeId RunAs 
EventDS DataSource Microsoft.Windows.EventProvider Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="A_domain_controller_has_an_extremely_high_number_of_replication_partners" Enabled="onStandardMonitoring" Target="AD2003Core!Microsoft.Windows.Server.2003.AD.DomainControllerRole" ConfirmDelivery="false" Remotable="false" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="EventDS" TypeID="Windows!Microsoft.Windows.EventProvider">

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

      <LogName>Operations Manager</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

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

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>AD Replication Partner Count</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery>EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>MatchesMOM2005RegularExpression</Operator>

              <Pattern>^(81)$</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>EventLevel</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>1</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertOwner>$Data/PublisherName$</AlertOwner>

      <AlertMessageId>$MPElement[Name="A_domain_controller_has_an_extremely_high_number_of_replication_partners.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

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

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>