DNN API Controller - A task was canceled Log - exception

Question

We have an JQuery Ajax call that will execute when a user is about to leave a page on a DNN module.
This error is being logged the whole time in the DNN logs.
How can I improve the error handling so that it doesn't log the whole time?
Here is the DNN log:
Here is the Front End Code on the Module :
$(window).on("beforeunload", function () {
ClearTempUserSessionWhenLeavePage();
});
function ClearTempUserSessionWhenLeavePage() {
if ($fromButtonEvent == false) {
var Url = $.fn.GetBaseURL() + 'DesktopModules/DNNCommon/API/Store/ClearTempUserSessionWhenLeavePage';
$.ajax({
url: Url,
type: 'GET',
async: true,
dataType: 'json',
success: function () {
},
error: function (x, y, z) {
}
}).promise().done(function () {
});
}
$fromButtonEvent = false;
}
We are inheriting the DNNApiController class on our DNNCommon class.
This is the C# method being called:
[AllowAnonymous]
[HttpGet]
public void ClearTempUserSessionWhenLeavePage()
{
if (SessionManager.GetSessionObject("NewCreatedWebUser") != null)
{
System.Web.HttpContext.Current.Session["DoNotRemoveSessionIfNotAuthenticated"] = false;
SessionManager.SetSessionObject("NewCreatedWebUser", null);
SessionManager.SetSessionObject("UserInfo", null);
SessionManager.SetSessionObject("NewCustomerCode", null);
}
}
I have attempted to add two different types of Try Catch clauses, but when I debug the code it won't hit the breakpoints and somehow it still logs the error in the DNN Admin logs. Is there perhaps a Try Catch in the DNNController class that is writing this error?
First attempt with Try Catch Clause with TaskCanceledException and TimeoutException:
[AllowAnonymous]
[HttpGet]
public void ClearTempUserSessionWhenLeavePage()
{
try
{
if (SessionManager.GetSessionObject("NewCreatedWebUser") != null)
{
System.Web.HttpContext.Current.Session["DoNotRemoveSessionIfNotAuthenticated"] = false;
SessionManager.SetSessionObject("NewCreatedWebUser", null);
SessionManager.SetSessionObject("UserInfo", null);
SessionManager.SetSessionObject("NewCustomerCode", null);
}
}
catch (Exception ex)
{
EventLogController logController = new EventLogController();
if (ex.InnerException is TimeoutException)
{
ex = ex.InnerException;
}
else if (ex is TaskCanceledException)
{
if ((ex as TaskCanceledException).CancellationToken == null || (ex as TaskCanceledException).CancellationToken.IsCancellationRequested == false)
{
ex = new TimeoutException("Timeout occurred");
logController.AddLog("Timout Occured - Clearing Temp User Session When Leave Page.", ex.ToString(), EventLogController.EventLogType.ADMIN_ALERT);
}
}
logController.AddLog("Problem Clearing Temp User Session When Leave Page.", ex.ToString(), EventLogController.EventLogType.ADMIN_ALERT);
}
}
Second attempt with a TaskCanceledException:
[AllowAnonymous]
[HttpGet]
public void ClearTempUserSessionWhenLeavePage()
{
try
{
if (SessionManager.GetSessionObject("NewCreatedWebUser") != null)
{
System.Web.HttpContext.Current.Session["DoNotRemoveSessionIfNotAuthenticated"] = false;
SessionManager.SetSessionObject("NewCreatedWebUser", null);
SessionManager.SetSessionObject("UserInfo", null);
SessionManager.SetSessionObject("NewCustomerCode", null);
}
}
catch (TaskCanceledException ex)
{
EventLogController logController = new EventLogController();
logController.AddLog("Task Cancelled Exception - Clearing Temp User Session When Leave Page.", ex.ToString(), EventLogController.EventLogType.ADMIN_ALERT);
}
}