Question re GetByPageUrl in incremental ticket export

[DCJackson]

Hello,
GetByPageUrl is working well for me getting view data (GroupTicketResponse). I am also using it to get all tickets in the incremental export (TicketExportResponse).

It is here that I randomly receive "Object reference not set to an instance of an object" on my GetByPageUrl call. So, I've been hyper-vigilant about checking for nulls everywhere, but it still occurs.

Code:

        var initialResponse = api.Tickets.GetInrementalTicketExport(startDate);

        int totalFetched = 0;

        if (initialResponse != null)
        {
            if (initialResponse.Results != null)
            {
                eventLog.WriteEntry("Number of tickets in first call to incremental export: " + initialResponse.Results.Count());
                totalFetched = initialResponse.Results.Count();

                responseList.Add(initialResponse);
                var nextPage = initialResponse.NextPage;


                if (initialResponse.Results.Count() >= 1000)
                {
                    TicketExportResponse paginationResponse = new TicketExportResponse();

                    do
                    {
                        //sleep 
                        System.Threading.Thread.Sleep(1000 * 65); // 65 seconds (This is necessary as this API call is rate limited)

                        if (!string.IsNullOrEmpty(nextPage))
                        {
                            paginationResponse = api.Tickets.GetByPageUrl<TicketExportResponse>(nextPage.Trim()); //**exception occurs here**
                            if (paginationResponse != null && !string.IsNullOrEmpty(paginationResponse.NextPage))
                            {
                                nextPage = paginationResponse.NextPage;
                            }
                        }

                        if (paginationResponse != null && paginationResponse.Results != null)
                        {
                            totalFetched = totalFetched + paginationResponse.Results.Count();
                            eventLog.WriteEntry("Just fetched another " + paginationResponse.Results.Count() + " records. Total so far: " + totalFetched);
                            responseList.Add(paginationResponse);
                        }

                    } while (paginationResponse != null && paginationResponse.Results != null && paginationResponse.Results.Count >= 1000);
                }
            }
        }

Am I missing something or is there a known issue? It pulls tickets great in batches of 1000 but...every now and again I get the Object Reference exception. It's random.

(I also sometimes get a 502 Bad Gateway and have put in re-try logic for that)

Thanks a lot in advance. Great API you created!
-DCJ

[mozts2005]

Can you please send us a test case for this?

[mozts2005]

I am unable to reproduce this issue until we have it in reproduce-able test case I am closing the issue