Randomly receiving 503, server unavailable, when retrieving activities?

Hello

I do no believe the problem is, exceeding the limitations. Take yesterday as an example… The job that runs the power shell scripts, failed at 6 AM. I then had to run the job, a couple of hours later, 7 times before the job ran successfully.

It appears to be failing on retrieving activities and I should point out that only last 24 hours of activities are being executed.

It is using the service principal to login
$pbiAccount = Connect-PowerBIServiceAccount -ServicePrincipal -Tenant $config.ServicePrincipal.TenantId -Credential $credential -Environment $config.ServicePrincipal.Environment

Part of the code that retrieves the activities is
$activityAPIUrl = "admin/activityevents?startDateTime='$($pivotDate.ToString("s"))'&endDateTime='$($pivotDate.AddHours(24).AddSeconds(-1).ToString("s"))'"

$audits = @()
$pageIndex = 1
$flagNoActivity = $true

do
{
if (!$result.continuationUri)
{
$result = Invoke-PowerBIRestMethod -Url $activityAPIUrl -method Get | ConvertFrom-Json
}
else {
$result = Invoke-PowerBIRestMethod -Url $result.continuationUri -method Get | ConvertFrom-Json
}

surely if it was a limitation issue, it would not work after seven attempts (or two attempts this morning).

An example of the error I am getting is below

31/01/2023 16:21:46
3
  Next execute .\Fetch - Activity.ps1
next activity call
 next activity continuation call
Script error on '.\Fetch - Activity.ps1' - System.AggregateException: One or more errors occurred. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
   at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
   at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
   at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Commands.Profile.InvokePowerBIRestMethod.<InvokeRestMethod>d__35.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at Microsoft.PowerBI.Commands.Profile.InvokePowerBIRestMethod.ExecuteCmdlet()
   at Microsoft.PowerBI.Commands.Common.PowerBICmdlet.ProcessRecord()
---> (Inner Exception #0) System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
   at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
   at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
   at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.PowerBI.Commands.Profile.InvokePowerBIRestMethod.<InvokeRestMethod>d__35.MoveNext()<---

3
  Next execute .\Fetch - Catalog.ps1
  successfully executed .\Fetch - Catalog.ps1
3
  Next execute .\Fetch - Graph.ps1
  successfully executed .\Fetch - Graph.ps1

Please note, the numbers and comments simply allowed me to see how far the code is reaching.

Any suggestions would be greatly appreciated.

Thanks