Why does foreach-object -Parallel work in console but not in Azure Runbook

Question

I have really simple script and when I run in a console it works but when I run it in Azure Runbook Test Plan it fails, Why???????

Script:

(1..2) | foreach-object -Parallel {  
        write-output "I am here $($_)"  
    } -ThrottleLimit 2  

When I run in the console I get:

But if I run in a Azure Runbook I get:

System.Management.Automation.ParameterBindingException: Parameter set cannot be resolved using the specified named parameters.  
   at System.Management.Automation.CmdletParameterBinderController.HandleRemainingArguments()  
   at System.Management.Automation.CmdletParameterBinderController.BindCommandLineParametersNoValidation(Collection`1 arguments)  
   at System.Management.Automation.CmdletParameterBinderController.BindCommandLineParameters(Collection`1 arguments)  
   at System.Management.Automation.CommandProcessor.BindCommandLineParameters()  
   at System.Management.Automation.CommandProcessorBase.DoPrepare(IDictionary psDefaultParameterValues)  
   at System.Management.Automation.Internal.PipelineProcessor.Start(Boolean incomingStream)  
   at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input)  
--- End of stack trace from previous location where exception was thrown ---  
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
   at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input)  
   at System.Management.Automation.PipelineOps.InvokePipeline(Object input, Boolean ignoreInput, CommandParameterInternal[][] pipeElements, CommandBaseAst[] pipeElementAsts, CommandRedirection[][] commandRedirections, FunctionContext funcContext)  
   at System.Management.Automation.Interpreter.ActionCallInstruction`6.Run(InterpretedFrame frame)  
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)  

Answer 1

Hi @Phil Davies ,

The reason it currently fails in Azure Automation sandbox environment is because Foreach-Object -Parallel command was introduced in powershell version 7 preview 3 but currently Azure Automation powershell environment runs on version 5.1.

As informed here, support for Powershell 7.0 in Azure Automation would be towards CY21 Q4 timeframe. Post that, would be the support for next versions or preview versions.

If interested, you may upvote this related feature request. In general, Azure feature team would check feasibility of a feature request, prioritize against existing feature backlog, add in roadmap as appropriate and would announce and/or update the related Azure document once a feature request is addressed.