Web Conferencing Edge component entered throttling state due to large number of queued bytes

Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.WebConfEdge.DPROXY_EVENT_SYSTEM_THROTTLING_ON (UnitMonitor)

Knowledge Base article:

Summary

Web Conferencing Edge Server has started throttling server connections

Causes

The number of bytes queued in Web Conferencing Edge Server has crossed the limit of high threshold for queued bytes. This can happen because of the process running out of resources (CPU or network bandwidth) or the infrastructure being under provisioned for the traffic it is expected to support.

Resolutions

Check and make sure that the infrastructure is properly provisioned for the amount of traffic that is being processed by Web Conferencing Edge Server. This can be achieved by increasing bandwidth in the case of network latency, increasing the CPU capacity of the machine in the case of CPU limits or by deploying more Web Conferencing Edge Server machines to handle the traffic.

Element properties:

Target

Microsoft.LS.2015.Component.WebConfEdge

Parent Monitor

System.Health.AvailabilityState

Category

AvailabilityHealth

Enabled

True

Alert Generate

True

Alert Severity

Error

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.LS.2015.MonitorType.PairedEvent.Simple

Remotable

True

Accessibility

Public

Alert Message

[Skype] Web Conferencing Edge Server has started throttling server connections

{0}

Please see the 'Product Knowledge' and the 'Alert Context' tab on Alert Properties view for more information.

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.WebConfEdge.DPROXY_EVENT_SYSTEM_THROTTLING_ON" Accessibility="Public" Enabled="true" Target="Microsoft.LS.2015.Component.WebConfEdge" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" TypeID="Microsoft.LS.2015.MonitorType.PairedEvent.Simple" ConfirmDelivery="true">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Alert_Web_Conferencing_Edge_Server_has_started_throttling_server_connections">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

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

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.WebConfEdge.DPROXY_EVENT_SYSTEM_THROTTLING_ON.Success" MonitorTypeStateID="SuccessEventRaised" HealthState="Success"/>

    <OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.WebConfEdge.DPROXY_EVENT_SYSTEM_THROTTLING_ON.Error" MonitorTypeStateID="ErrorEventRaised" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

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

    <LogName>Lync Server</LogName>

    <SuccessExpression>

      <Or>

        <Expression>

          <And>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

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

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="UnsignedInteger">42006</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

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

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="String">LS Web Conferencing Edge Server</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

          </And>

        </Expression>

        <Expression>

          <And>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

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

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="UnsignedInteger">41984</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

            <Expression>

              <SimpleExpression>

                <ValueExpression>

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

                </ValueExpression>

                <Operator>Equal</Operator>

                <ValueExpression>

                  <Value Type="String">LS Web Conferencing Edge Server</Value>

                </ValueExpression>

              </SimpleExpression>

            </Expression>

          </And>

        </Expression>

      </Or>

    </SuccessExpression>

    <ErrorExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">42005</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">LS Web Conferencing Edge Server</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </ErrorExpression>

  </Configuration>

</UnitMonitor>