Failed to remove command from instance store

Microsoft.ApplicationServer.PersistenceStoreConnection.Event50911 (UnitMonitor)

This event indicates that the Workflow Management Service executed a command, but failed to remove it from the queue (exception). The service will retry periodically. If the monitor doesn’t see the event for 10 minutes it assumes the problem has been fixed and resets the monitor.

Knowledge Base article:

Summary

Element properties:

Target	Microsoft.ApplicationServer.PersistenceStoreConnection
Parent Monitor	Microsoft.ApplicationServer.PersistenceConnection.ProviderCommunication
Category	PerformanceHealth
Enabled	True
Alert Generate	False
Alert Auto Resolve	True
Monitor Type	Microsoft.Windows.SingleEventLogTimer2StateMonitorType
Remotable	True
Accessibility	Public
RunAs	Default

Source Code:

<UnitMonitor ID="Microsoft.ApplicationServer.PersistenceStoreConnection.Event50911" Accessibility="Public" Enabled="true" Target="MicrosoftApplicationServerLibrary!Microsoft.ApplicationServer.PersistenceStoreConnection" ParentMonitorID="Microsoft.ApplicationServer.PersistenceConnection.ProviderCommunication" Remotable="true" Priority="Normal" TypeID="Windows!Microsoft.Windows.SingleEventLogTimer2StateMonitorType" ConfirmDelivery="true">

  <Category>PerformanceHealth</Category>

  <OperationalStates>

    <OperationalState ID="EventRaised" MonitorTypeStateID="EventRaised" HealthState="Error"/>

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

  </OperationalStates>

  <Configuration>

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

    <LogName>Microsoft-Windows-Application Server-System Services/Admin</LogName>

    <Expression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">50911</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">Microsoft-Windows-Application Server-Workflow Management Service</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[1]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Property[Type="MicrosoftApplicationServerLibrary!Microsoft.ApplicationServer.PersistenceStoreConnection"]/StoreName$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[2]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Property[Type="MicrosoftApplicationServerLibrary!Microsoft.ApplicationServer.PersistenceStoreConnection"]/Location$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </Expression>

    <TimerWaitInSeconds>600</TimerWaitInSeconds>

  </Configuration>

</UnitMonitor>