Invoking Web Request in PowerShell Version 2.0 Timed out - powershell

Question

This in continuation to one of my previous queries Invoke-WebRequest equivalent in PowerShell v2
Im trying to run the below script, it ran 2-3 timed but after that im repeatedly getting the below timed out error
Exception calling "GetRequestStream" with "0" argument(s): "The operation has timed out"
Here's the script
function Invoke_Workflow {
param(
[Parameter(Mandatory=$True)]
[string]$arg,
[Parameter(Mandatory=$True)]
[string]$whostname,
[Parameter(Mandatory=$True)]
[string]$uuid,
[Parameter(Mandatory=$True)]
[string]$wfname,
[Parameter(Mandatory=$True)]
[string]$wpassword,
[Parameter(Mandatory=$True)]
[string]$wusername
)
$body =
"<wInput>
<userInputValues>
<userInputEntry value='$arg' key='stringArgument'/>
</userInputValues>
<executionDateAndTime></executionDateAndTime>
<comments></comments>
</wInput>"
# Disable certificate validation using certificate policy that ignores all certificates
add-type #"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class IDontCarePolicy : ICertificatePolicy {
public IDontCarePolicy() {}
public bool CheckValidationResult(
ServicePoint sPoint, X509Certificate cert,
WebRequest wRequest, int certProb) {
return true;
}
}
"#
[System.Net.ServicePointManager]::CertificatePolicy = new-object IDontCarePolicy
$password = ConvertTo-SecureString $wfapassword -AsPlainText -Force
$credential = New-Object System.Management.Automation.PSCredential ($wfausername, $password)
$request = [System.Net.WebRequest]::Create($URI1)
$request.ContentType = "application/xml"
$request.Method = "POST"
$request.Credentials = $credential
# $request | Get-Member for a list of methods and properties
try
{
$request.ServicePoint.MaxIdleTime = 5000;
$request.ServicePoint.ConnectionLeaseTimeout = 5000;
$requestStream = $request.GetRequestStream()
$streamWriter = New-Object System.IO.StreamWriter($requestStream)
$streamWriter.Write($body)
}
finally
{
if ($null -ne $streamWriter) { $streamWriter.Dispose() }
if ($null -ne $requestStream) { $requestStream.Dispose() }
}
$res = $request.GetResponse()
$request.Abort()
}

Answer 1

Problem is most likely related to the default Servicepoint connection limit which is 2.
You can increase it (10 as an example below) and if you are making many requests in a single powershell session then adding a check of the currentconnection count and clearing them (8 as an example below) prior to reaching the set connection limit:
$request.ServicePoint.ConnectionLimit =10;
$conn=$request.ServicePoint.CurrentConnections
If ($conn -ge 8) {
$request.ServicePoint.CloseConnectionGroup("")
}