While building some multithreading Azure Runbooks that log into multiple subscriptions simultaneously, I noticed that these multiple concurrent runs often end up on the same Azure Automation Host.<\/p>\n
Apparently, these runbooks then don’t run in full isolation, and the following error may occur:<\/p>\n
The running command stopped because the preference variable “ErrorActionPreference” or common parameter is set to Stop: The process cannot access the file ‘C:\\Windows\\system32\\config\\systemprofile\\AppData\\Roaming\\Windows Azure Powershell\\TokenCache.dat’ because it is being used by another process.<\/p><\/blockquote>\n
AzureProfile.json may also get locked. I resolved this by doing a retry on the Save-AzureRMContext, and using a randomized file name for the azure json profile:<\/p>\n
\n\n$randomProfileName = [System.IO.Path]::GetRandomFileName()\n\nSave-AzureRmContext -Path .\\$randomProfileName -Force -Confirm:$False\n\n<\/pre>\nAnd for my full Azure Login code snippet:<\/p>\n
\n$randomProfileName = [System.IO.Path]::GetRandomFileName()\n $tries=0\n while($true){\n $tries++\n try{\n Write-Output "Logging in to Azure $azureSubscription"\n $res = Login-AzureRmAccount -Credential $azureCreds -SubscriptionId $azureSubscription -TenantId $tenantId -ErrorAction Stop\n Select-AzureRmSubscription -SubscriptionId $azureSubscription -ErrorAction Stop -TenantId $tenantId\n if($res.Context.Subscription.Id -eq $azureSubscription){\n Write-Output "Logged in to Azure subscription $($res.Context.Subscription.Id)"\n }else{\n Throw "Failed, we were logged in to $($res.Context.Subscription.Id) while trying to log in to $azureSubscription"\n }\n Save-AzureRmContext -Path .\\$randomProfileName -Force -Confirm:$False\n break\n }catch{\n if($tries -ge 30){\n Throw\n Exit\n }\n #sleep on failed attempts, as the azure token cache gets locked by concurrent jobs\n sleep -s (Get-Random -minimum 1 -maximum 6)\n }\n }\n<\/pre>\n","protected":false},"excerpt":{"rendered":"While building some multithreading Azure Runbooks that log into multiple subscriptions simultaneously, I noticed that these multiple concurrent runs often end up on the same Azure Automation Host. Apparently, these runbooks then don’t run in full isolation, and the following error may occur: The running command stopped because the preference variable “ErrorActionPreference” or common parameter … Continue reading The process cannot access the file ‘C:\\Windows\\system32\\config\\systemprofile\\AppData\\Roaming\\Windows Azure Powershell\\TokenCache.dat’ because it is being used by another process.<\/span>