Powershell multithreading not working on cmd.exe

Question

I need to run some code in powershell using multi-thread, i have tested a simple snippet and it runs fine on a powershell console. however when i try to run on a cmd.exe the code doesnt execute and no error was thrown wondering what is going on? if someone you help on this.

sample code as follow

$throttleLimit = 10

$iss = [system.management.automation.runspaces.initialsessionstate]::CreateDefault()
$Pool = [runspacefactory]::CreateRunspacePool(1, $throttleLimit, $iss, $Host)
$Pool.Open()

$ScriptBlock = {
param($id)
Start-Sleep -Seconds 2
Write-Host "Done processing ID $id"
[System.Console]::WriteLine("Done processing ID $id")
}

for ($x = 1; $x -le 40; $x++) {
$powershell = [powershell]::Create().AddScript($ScriptBlock).AddArgument($x)
$powershell.RunspacePool = $Pool
$handle = $powershell.BeginInvoke()
}

my batch file code is as follow

powershell -Command .\multiT.ps1 2>&1

Why aren't you using PowerShell Jobs instead?

alroc
– alroc

2013-02-06 14:34:50 +00:00
Commented Feb 6, 2013 at 14:34 — alroc
– alroc, Commented Feb 6, 2013 at 14:34

Mike Shepard · Accepted Answer · 2013-02-06 05:51:35Z

1

In the ISE, the script finishes before the output from the threads starts to show up. I added start-sleep -sec 10 to the end of the code and I get output from cmd now. For some reason the output is doubled, though (as in, I get 2 lines for each thread).

answered Feb 6, 2013 at 5:51

Mike Shepard

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1 Comment

Eric Soo Over a year ago

its now showing on the console but like you said it has duplicate printout. i guess you were right the console exit before the thread finishes. thanks for the help, i will look into why showing duplicate results.

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