Get-AzPolicyState returns Object reference not set to an instance of an object.

[mikkokok]

Description

Get-AzPolicyState returns Object reference not set to an instance of an object. This only happens with the latest version of Powershell 6. Worked fine with PSVersion 6.1.2

Steps to reproduce

Install latest Powershell 6 and latest Az-module. Set your Az context and then run command "Get-AzPolicystate"

Environment data

Name                           Value
----                           -----
PSVersion                      6.2.1
PSEdition                      Core
GitCommitId                    6.2.1
OS                             Microsoft Windows 10.0.17763
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Module versions

ModuleType Version    Name                                PSEdition ExportedCommands
---------- -------    ----                                --------- ----------------
Script     2.2.0      Az                                  Core,Desk
Script     1.3.0      Az                                  Core,Desk
Script     1.5.2      Az.Accounts                         Core,Desk {Disable-AzDataCollection, Disable-AzContextAutosa…
Script     1.3.0      Az.Accounts                         Core,Desk {Disable-AzDataCollection, Disable-AzContextAutosa…
Script     1.0.1      Az.Aks                              Core,Desk {Get-AzAks, New-AzAks, Remove-AzAks, Import-AzAksC…
Script     1.1.0      Az.AnalysisServices                 Core,Desk {Resume-AzAnalysisServicesServer, Suspend-AzAnalys…
Script     1.0.0      Az.AnalysisServices                 Core,Desk {Resume-AzAnalysisServicesServer, Suspend-AzAnalys…
Script     1.1.0      Az.ApiManagement                    Core,Desk {Add-AzApiManagementApiToProduct, Add-AzApiManagem…
Script     1.0.0      Az.ApiManagement                    Core,Desk {Add-AzApiManagementRegion, Get-AzApiManagementSso…
Script     1.0.0      Az.ApplicationInsights              Core,Desk {Get-AzApplicationInsights, New-AzApplicationInsig…
Script     1.2.2      Az.Automation                       Core,Desk {Get-AzAutomationHybridWorkerGroup, Remove-AzAutom…
Script     1.1.0      Az.Automation                       Core,Desk {Get-AzAutomationHybridWorkerGroup, Remove-AzAutom…
Script     1.1.0      Az.Batch                            Core,Desk {Remove-AzBatchAccount, Get-AzBatchAccount, Get-Az…
Script     1.0.0      Az.Batch                            Core,Desk {Remove-AzBatchAccount, Get-AzBatchAccount, Get-Az…
Script     1.0.0      Az.Billing                          Core,Desk {Get-AzBillingInvoice, Get-AzBillingPeriod, Get-Az…
Script     1.3.0      Az.Cdn                              Core,Desk {Get-AzCdnProfile, Get-AzCdnProfileSsoUrl, New-AzC…
Script     1.0.1      Az.Cdn                              Core,Desk {Get-AzCdnProfile, Get-AzCdnProfileSsoUrl, New-AzC…
Script     1.1.1      Az.CognitiveServices                Core,Desk {Get-AzCognitiveServicesAccount, Get-AzCognitiveSe…
Script     1.0.0      Az.CognitiveServices                Core,Desk {Get-AzCognitiveServicesAccount, Get-AzCognitiveSe…
Script     2.2.0      Az.Compute                          Core,Desk {Remove-AzAvailabilitySet, Get-AzAvailabilitySet, …
Script     1.3.0      Az.Compute                          Core,Desk {Remove-AzAvailabilitySet, Get-AzAvailabilitySet, …
Script     1.0.1      Az.ContainerInstance                Core,Desk {New-AzContainerGroup, Get-AzContainerGroup, Remov…
Script     1.0.0      Az.ContainerInstance                Core,Desk {New-AzContainerGroup, Get-AzContainerGroup, Remov…
Script     1.0.1      Az.ContainerRegistry                Core,Desk {New-AzContainerRegistry, Get-AzContainerRegistry,…
Script     1.1.1      Az.DataFactory                      Core,Desk {Set-AzDataFactoryV2, Update-AzDataFactoryV2, Get-…
Script     1.0.1      Az.DataFactory                      Core,Desk {Set-AzDataFactoryV2, Update-AzDataFactoryV2, Get-…
Script     1.0.0      Az.DataLakeAnalytics                Core,Desk {Get-AzDataLakeAnalyticsDataSource, New-AzDataLake…
Script     1.2.1      Az.DataLakeStore                    Core,Desk {Get-AzDataLakeStoreTrustedIdProvider, Remove-AzDa…
Script     1.0.2      Az.DataLakeStore                    Core,Desk {Get-AzDataLakeStoreTrustedIdProvider, Remove-AzDa…
Script     1.0.0      Az.DeploymentManager                Core,Desk {Get-AzDeploymentManagerArtifactSource, New-AzDepl…
Script     1.0.0      Az.DevTestLabs                      Core,Desk {Get-AzDtlAllowedVMSizesPolicy, Get-AzDtlAutoShutd…
Script     1.1.0      Az.Dns                              Core,Desk {Get-AzDnsRecordSet, New-AzDnsRecordConfig, Remove…
Script     1.0.0      Az.Dns                              Core,Desk {Get-AzDnsRecordSet, New-AzDnsRecordConfig, Remove…
Script     1.1.1      Az.EventGrid                        Core,Desk {New-AzEventGridTopic, Get-AzEventGridTopic, Set-A…
Script     1.1.0      Az.EventGrid                        Core,Desk {New-AzEventGridTopic, Get-AzEventGridTopic, Set-A…
Script     1.2.0      Az.EventHub                         Core,Desk {New-AzEventHubNamespace, Get-AzEventHubNamespace,…
Script     1.0.0      Az.EventHub                         Core,Desk {New-AzEventHubNamespace, Get-AzEventHubNamespace,…
Script     1.0.0      Az.FrontDoor                        Core,Desk {New-AzFrontDoor, Get-AzFrontDoor, Set-AzFrontDoor…
Script     2.0.0      Az.HDInsight                        Core,Desk {Get-AzHDInsightJob, New-AzHDInsightSqoopJobDefini…
Script     1.0.0      Az.HDInsight                        Core,Desk {Get-AzHDInsightJob, New-AzHDInsightSqoopJobDefini…
Script     1.1.0      Az.IotHub                           Core,Desk {Add-AzIotHubKey, Get-AzIotHubEventHubConsumerGrou…
Script     1.0.2      Az.IotHub                           Core,Desk {Add-AzIotHubKey, Get-AzIotHubEventHubConsumerGrou…
Script     1.2.0      Az.KeyVault                         Core,Desk {Add-AzKeyVaultCertificate, Update-AzKeyVaultCerti…
Script     1.0.1      Az.KeyVault                         Core,Desk {Add-AzKeyVaultCertificate, Update-AzKeyVaultCerti…
Script     1.2.1      Az.LogicApp                         Core,Desk {Get-AzIntegrationAccountAgreement, Get-AzIntegrat…
Script     1.1.0      Az.LogicApp                         Core,Desk {Get-AzIntegrationAccountAgreement, Get-AzIntegrat…
Script     1.1.0      Az.MachineLearning                  Core,Desk {Move-AzMlCommitmentAssociation, Get-AzMlCommitmen…
Script     1.0.0      Az.MachineLearning                  Core,Desk {Move-AzMlCommitmentAssociation, Get-AzMlCommitmen…
Script     1.0.0      Az.MarketplaceOrdering              Core,Desk {Get-AzMarketplaceTerms, Set-AzMarketplaceTerms}
Script     1.1.0      Az.Media                            Core,Desk {Sync-AzMediaServiceStorageKey, Set-AzMediaService…
Script     1.0.0      Az.Media                            Core,Desk {Sync-AzMediaServiceStorageKeys, Set-AzMediaServic…
Script     1.2.1      Az.Monitor                          Core,Desk {Get-AzMetricDefinition, Get-AzMetric, Remove-AzLo…
Script     1.0.0      Az.Monitor                          Core,Desk {Get-AzMetricDefinition, Get-AzMetric, Remove-AzLo…
Script     1.9.0      Az.Network                          Core,Desk {Add-AzApplicationGatewayAuthenticationCertificate…
Script     1.1.0      Az.Network                          Core,Desk {Add-AzApplicationGatewayAuthenticationCertificate…
Script     1.1.0      Az.NotificationHubs                 Core,Desk {Get-AzNotificationHub, Get-AzNotificationHubAutho…
Script     1.0.0      Az.NotificationHubs                 Core,Desk {Get-AzNotificationHub, Get-AzNotificationHubAutho…
Script     1.2.0      Az.OperationalInsights              Core,Desk {New-AzOperationalInsightsAzureActivityLogDataSour…
Script     1.0.0      Az.OperationalInsights              Core,Desk {New-AzOperationalInsightsAzureActivityLogDataSour…
Script     1.1.1      Az.PolicyInsights                   Core,Desk {Get-AzPolicyEvent, Get-AzPolicyState, Get-AzPolic…
Script     1.0.0      Az.PolicyInsights                   Core,Desk {Get-AzPolicyEvent, Get-AzPolicyState, Get-AzPolic…
Script     1.1.0      Az.PowerBIEmbedded                  Core,Desk {Remove-AzPowerBIWorkspaceCollection, Get-AzPowerB…
Script     1.0.0      Az.PowerBIEmbedded                  Core,Desk {Remove-AzPowerBIWorkspaceCollection, Get-AzPowerB…
Script     1.4.1      Az.RecoveryServices                 Core,Desk {Get-AzRecoveryServicesBackupProperty, Get-AzRecov…
Script     1.0.0      Az.RecoveryServices                 Core,Desk {Get-AzRecoveryServicesBackupProperty, Get-AzRecov…
Script     1.1.0      Az.RedisCache                       Core,Desk {Remove-AzRedisCachePatchSchedule, New-AzRedisCach…
Script     1.0.0      Az.RedisCache                       Core,Desk {Remove-AzRedisCachePatchSchedule, New-AzRedisCach…
Script     1.0.1      Az.Relay                            Core,Desk {New-AzRelayNamespace, Get-AzRelayNamespace, Set-A…
Script     1.0.0      Az.Relay                            Core,Desk {New-AzRelayNamespace, Get-AzRelayNamespace, Set-A…
Script     1.4.0      Az.Resources                        Core,Desk {Get-AzProviderOperation, Remove-AzRoleAssignment,…
Script     1.1.2      Az.Resources                        Core,Desk {Get-AzProviderOperation, Remove-AzRoleAssignment,…
Script     1.2.0      Az.ServiceBus                       Core,Desk {New-AzServiceBusNamespace, Get-AzServiceBusNamesp…
Script     1.0.0      Az.ServiceBus                       Core,Desk {New-AzServiceBusNamespace, Get-AzServiceBusNamesp…
Script     1.1.0      Az.ServiceFabric                    Core,Desk {Add-AzServiceFabricApplicationCertificate, Add-Az…
Script     1.0.1      Az.ServiceFabric                    Core,Desk {Add-AzServiceFabricApplicationCertificate, Add-Az…
Script     1.0.2      Az.SignalR                          Core,Desk {New-AzSignalR, Get-AzSignalR, Get-AzSignalRKey, N…
Script     1.11.0     Az.Sql                              Core,Desk {Get-AzSqlDatabaseTransparentDataEncryption, Get-A…
Script     1.2.0      Az.Sql                              Core,Desk {Get-AzSqlDatabaseTransparentDataEncryption, Get-A…
Script     1.3.0      Az.Storage                          Core,Desk {Get-AzStorageAccount, Get-AzStorageAccountKey, Ne…
Script     1.0.2      Az.Storage                          Core,Desk {Get-AzStorageAccount, Get-AzStorageAccountKey, Ne…
Script     1.0.0      Az.StreamAnalytics                  Core,Desk {Get-AzStreamAnalyticsFunction, Get-AzStreamAnalyt…
Script     1.0.1      Az.TrafficManager                   Core,Desk {Add-AzTrafficManagerCustomHeaderToEndpoint, Remov…
Script     1.2.2      Az.Websites                         Core,Desk {Get-AzAppServicePlan, Set-AzAppServicePlan, New-A…
Script     1.1.0      Az.Websites                         Core,Desk {Get-AzAppServicePlan, Set-AzAppServicePlan, New-A…

Debug output

DEBUG: AzureQoSEvent: CommandName - Get-AzPolicyState; IsSuccess - False; Duration - 00:00:04.8622169; Exception - System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.Azure.Commands.PolicyInsights.Models.PolicyState..ctor(PolicyState policyState)
   at Microsoft.Azure.Commands.PolicyInsights.Cmdlets.GetAzureRmPolicyState.<>c.<ExecuteCmdlet>b__64_0(PolicyState policyState)
   at System.Linq.Enumerable.SelectListIterator`2.MoveNext()
   at System.Management.Automation.MshCommandRuntime._WriteObjectsSkipAllowCheck(Object sendToPipeline)
   at System.Management.Automation.Cmdlet.WriteObject(Object sendToPipeline, Boolean enumerateCollection)
   at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.WriteObject(Object sendToPipeline, Boolean enumerateCollection)
   at Microsoft.Azure.Commands.PolicyInsights.Cmdlets.GetAzureRmPolicyState.ExecuteCmdlet()
   at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.<>c__3`1.<ExecuteSynchronouslyOrAsJob>b__3_0(T c)
   at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet, Action`1 executor)
   at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet)
   at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.ProcessRecord();

Error output

Message        : Object reference not set to an instance of an object.
StackTrace     :    at Microsoft.Azure.Commands.PolicyInsights.Models.PolicyState..ctor(PolicyState policyState)
                    at Microsoft.Azure.Commands.PolicyInsights.Cmdlets.GetAzureRmPolicyState.<>c.<ExecuteCmdlet>b__64_0(PolicyState policyState)
                    at System.Linq.Enumerable.SelectListIterator`2.MoveNext()
                    at System.Management.Automation.MshCommandRuntime._WriteObjectsSkipAllowCheck(Object sendToPipeline)
                    at System.Management.Automation.Cmdlet.WriteObject(Object sendToPipeline, Boolean enumerateCollection)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.WriteObject(Object sendToPipeline, Boolean enumerateCollection)
                    at Microsoft.Azure.Commands.PolicyInsights.Cmdlets.GetAzureRmPolicyState.ExecuteCmdlet()
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.<>c__3`1.<ExecuteSynchronouslyOrAsJob>b__3_0(T c)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet, Action`1 executor)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.ProcessRecord()
Exception      : System.NullReferenceException
InvocationInfo : {Get-AzPolicyState}
Line           : Get-AzPolicyState
Position       : At line:1 char:1
                 + Get-AzPolicyState
                 + ~~~~~~~~~~~~~~~~~

[cormacpayne]

@mikkokok Hey Mikko, thanks for reporting this -- it looks like this is a similar to issue to this bug that was patched last release, but is occurring in other types inside of PolicyInsights. We'll fix this in PolicyState and see if there are any other types that could hit this issue.

[markcowl]

Fixed.