Critical State

Microsoft.SQLServerAppliance.PDW.Network.ConnectivityStateMonitor.Critical (UnitMonitor)

This monitor detects if Connectivity Component is in Critical state.

Knowledge Base article:

Summary

The network adapter connection is reporting a critical state that typically means at least one port has failed. If both ports fail on this adapter then the cluster service will trigger a failover event for the node.

Causes

This is caused because of one of the following reasons:

Network is disconnected (vendor status: 0).
Hardware is not present (vendor status: 4).
Hardware has been disabled (vendor status: 5).
Media is disconnected (vendor status: 7).
Authentication has failed (vendor status: 10).
Invalid address was used (vendor status: 11).
Credentials are required but not supplied (vendor status: 12).

For more details, view the component's connectivity_connection_status property in the PDW Admin Console or query the sys.dm_pdw_component_health_status DMV.

Resolutions

To diagnose this issue:

1) Use the sys.dm_pdw_errors and sys.dm_pdw_os_event_logs DMVs to check for relevant failures.

2) Verify if this caused a port failure. To do this, use a Windows administrator account to login to the Management node. Open a command window and ping the IP address for the affected network adapter.

3) If you cannot ping the network adapter, the port may have failed. Access the physical appliance to check the cable connections. Check the network switch logs for this port to determine if the switch has issues.

To resolve this issue, contact Microsoft support and provide them with the information you have gathered. Microsoft Support will help you to understand the failure and help you to bring the network adapter back online or into a healthy state.

Element properties:

Target

Microsoft.SQLServerAppliance.PDW.Network.Connectivity

Parent Monitor

System.Health.AvailabilityState

Category

AvailabilityHealth

Enabled

True

Alert Generate

True

Alert Severity

Warning

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.SQLServerAppliance.PDW.ComponentTwoStateType

Remotable

True

Accessibility

Public

Alert Message

Network connection has CRITICAL status

Appliance Name: {0}
Node Name: {1}
Component: {2}
Component Details: https://{3}/Topology/NodeDetails/{4}?compId={5}

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.SQLServerAppliance.PDW.Network.ConnectivityStateMonitor.Critical" Accessibility="Public" Enabled="true" Target="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Network.Connectivity" ParentMonitorID="Health!System.Health.AvailabilityState" TypeID="Microsoft.SQLServerAppliance.PDW.ComponentTwoStateType" Remotable="true" Priority="Normal" ConfirmDelivery="false">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Microsoft.SQLServerAppliance.PDW.Network.ConnectivityStateMonitor.Critical.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Warning</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/ApplianceID$</AlertParameter1>

      <AlertParameter2>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/NodeName$</AlertParameter2>

      <AlertParameter3>$Target/Property[Type="System!System.Entity"]/DisplayName$</AlertParameter3>

      <AlertParameter4>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/ApplianceNetworkAddress$</AlertParameter4>

      <AlertParameter5>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/NodeID$</AlertParameter5>

      <AlertParameter6>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/ID$</AlertParameter6>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

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

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

  </OperationalStates>

  <Configuration>

    <IntervalSeconds>900</IntervalSeconds>

    <SyncTime/>

    <TimeoutSeconds>600</TimeoutSeconds>

    <ConnectionString>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/ApplianceID$</ConnectionString>

    <NodeName>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/NodeName$</NodeName>

    <GroupName>$Target/Property[Type="PDWLibrary!Microsoft.SQLServerAppliance.PDW.Component"]/GroupName$</GroupName>

    <ComponentName>$Target/Property[Type="System!System.Entity"]/DisplayName$</ComponentName>

    <MonitoredState>Critical</MonitoredState>

  </Configuration>

</UnitMonitor>