PowerShell Script in Task Scheduler with Async Function - powershell

Question

I have a fairly large PowerShell script that I've broken into two separate scripts. The first script ends with a call to an async function and then exits.
The function checks on the status of an e-mail export that was generated in the previous script, performing a WHILE loop where it makes a call to Google every sixty seconds to see if the export is ready. Once the export is ready it updates a couple of SQL dbs and my second script knows to take over.
This works 100% of the time when I run the "first script" in the shell/console. But I've started noticing that when my scheduled task is triggered in Task Scheduler that... nothing happens. I have extensive logging, so I know that the parameters ARE being sent over to the async function, but it seems to just poop out rather than continue to loop through the WHILE and do the every-sixty-second checks.
I feel like I've done my due diligence in Googling here, but... is there something I'm missing with a Task Scheduler job to ensure that a function containing a WHILE loop will properly run?
EDIT BELOW
To better explain what I'm doing I will include stripped code from my function and the call to the function from the main script below.
First, the call to the function at the very end of "script_01."
# Let's send the Google Vault export information over to our function.
Try {
$VaultParameters = #{
employee_name = "$employee_name"
export_name = "$export_name"
sql_id = "$sql_id"
vault_status_id = "$vault_status_id"
}
VaultExport #VaultParameters
$LoggingParameters = #{
logfile = "C:\script_logs\log.log"
log = "INFO: Sent the Google Vault export information over to our async function."
}
EventLogging #LoggingParameters
} Catch {
$LoggingParameters = #{
logfile = "C:\script_logs\log.log"
log = "ERROR: Could not send the Google Vault export information over to our async function.`n$_"
}
EventLogging #LoggingParameters
}
And now the function itself. It is large...
function VaultExport {
param (
[cmdletbinding()]
[parameter()]
[string]$employee_name,
[parameter()]
[string]$export_name,
[parameter()]
[string]$sql_id,
[parameter()]
[string]$vault_status_id
)
$scriptBlock = {
param ($employee_name,$export_name,$sql_id,$vault_status_id)
Import-Module SimplySQL
$logfile = "C:\script_logs\log.log"
$now = (Get-Date).tostring("MM-dd-yyyy hh:mm:ss")
# Let's define our MySQL database credentials for later use.
# DEFINING SQL CREDS HERE
# Let's generate secure credentials for our MySQL 'terms' db.
# GENERATING SECURE CREDS HERE
# And now we'll connect to our SQL db...
# CONNECTING TO SQL HERE
$vault_ready = "no"
Add-Content $logfile "$now INFO: Beginning the WHILE loop while $export_name completes..."
while ($vault_ready -eq "no") {
$vault_status = gam info export "Email Exports" "$export_name"
$vault_status = $vault_status -Match "COMPLETED"
$vault_status = $vault_status -split(": ")
$vault_status = $vault_status[1]
if ($vault_status -eq "COMPLETED") {
$vault_ready = "yes"
$completed = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
Invoke-SqlUpdate -Query "UPDATE ``table`` SET ``vault_status`` = '$vault_status', ``vault_completed`` = '$completed' WHERE ``id`` = '$vault_status_id'"
Invoke-SqlUpdate -Query "UPDATE ``table`` SET ``vault_status`` = '1' WHERE ``id`` = '$sql_id'"
$now = (Get-Date).tostring("MM-dd-yyyy hh:mm:ss")
Add-Content $logfile "$now INFO: $export_name is ready to download. Updated vault_status in our dbs."
} else {
$vault_status = gam info export "Email Exports" "$export_name"
$vault_status = $vault_status -Match "IN_PROGRESS"
$vault_status = $vault_status -split(": ")
$vault_status = $vault_status[1]
Invoke-SqlUpdate -Query "UPDATE ``table`` SET ``vault_status`` = '$vault_status' WHERE ``id`` = '$vault_status_id'"
$now = (Get-Date).tostring("MM-dd-yyyy hh:mm:ss")
Add-Content $logfile "$now INFO: $export_name is not yet ready: ($vault_status). Checking again in sixty seconds."
Start-Sleep 60
}
}
}
Start-Job -ScriptBlock $scriptBlock -ArgumentList #($employee_name,$export_name,$sql_id,$vault_status_id)
}
exit

Answer 1

I'm unsure why you wouldn't just have the task execute every 30 seconds instead of having a process run indefinitely and using it's own timers
The condition you are setting for the WHILE statement is being met, this is why the loop doesn't continue.
Change the condition to something that will never be met and the problem should go away, i.e.
$Value1 = 0
WHILE($Value1 -ne 1){
#do things, never updating the $value1 variable
}