Windows Service not receiving API response when request takes more than 5 mins to process - queue

Question

We have implented a queuing mechanism with windows service which sends API requests in sequential manner. When the API request take more than 5 mins to process, windonws service not taking the subsequent items.
With the log we observed that, windows service not receiving response from API. But when we debug the same things are working fine.
Do we know whether API not giving response back to windows service or something is going on?
Below is the code piece for this issue:
private void ProcessQueueRequestsByEnvironment(EnvironmentTypes environmentType)
{
try
{
var queueRequests = new DbHelper().GetQueueRequestsByEnvironment(environmentType);
if (queueRequests != null && queueRequests.Count > 0)
{
foreach (var queueRequest in queueRequests)
{
LoggingHelper.WriteToFile("======Request Starting - " + environmentType.ToString() + "====== QueueId: " + queueRequest.QueueId + " AnalysisId: " + queueRequest.AnalysisId + " at " + DateTime.Now);
ApiServiceHelper.SendAnalysisRequestToProcess(queueRequest, environmentType);
LoggingHelper.WriteToFile("======Request Completed - " + environmentType.ToString() + "====== QueueId: " + queueRequest.QueueId + " AnalysisId: " + queueRequest.AnalysisId + " at " + DateTime.Now);
}
}
}
catch (Exception ex)
{
if (!ex.Message.Contains("Could not find stored procedure 'SP_GetQueueRequestsToProcess'"))
{
EmailHelper.SendErrorEmailNotification(ex, "QueueProcessingService::ProcessQueueRequestsByEnvironment");
}
LoggingHelper.WriteToFile("======Error occurred while processing " + environmentType.ToString() + " requests at ======" + DateTime.Now + Environment.NewLine + ex.Message + ex.StackTrace);
}
}
....................
public class ApiServiceHelper
{
public static bool SendAnalysisRequestToProcess(QueueItemModel queueItem, EnvironmentTypes environmentType)
{
try
{
using (var client = new HttpClient())
{
client.Timeout = Timeout.InfiniteTimeSpan; // Infinite request timeout
string apiUrl = ConfigurationManager.AppSettings["ProductionApiUrl"];
if (environmentType == EnvironmentTypes.STAGING)
{
apiUrl = ConfigurationManager.AppSettings["StagingApiUrl"];
}
client.BaseAddress = new Uri(apiUrl);
client.DefaultRequestHeaders.Add("ServiceRequestKey", ConfigurationManager.AppSettings["ServiceRequestKey"]);
using (StringContent content = new StringContent(JsonConvert.SerializeObject(queueItem), Encoding.UTF8, "application/json"))
{
//HTTP POST
var result = client.PostAsync(apiUrl, content).Result;
bool objResult = JsonConvert.DeserializeObject<bool>(result.Content.ReadAsStringAsync().Result);
return objResult;
}
}
}
catch (Exception ex)
{
LoggingHelper.WriteToFile("======Error occurred while processing the request====== QueueId: " + queueItem.QueueId + " AnalysisId: " + queueItem.AnalysisId + " at " + DateTime.Now + Environment.NewLine + ex.Message + ex.StackTrace);
EmailHelper.SendErrorEmailNotification(ex, "ApiServiceHelper::SendAnalysisRequestToProcess");
return false;
}
}