Azure Functions CloudQueue AddMessageAsync QueueRequestOptions LinearRetryPolicy Doesn't Do Anything

Question

I am trying to implement linear retry policy for a cloud queue. Previously I was managing the retry logic programatically on each dequeue but I saw the RetryPolicy member on QueueRequestOptions and thought I could set up the retry policy on the first add and have the cloud queue manage retries automatically. Unfortunately the code below doesn't seem to do anything. It still retries almost immediately and it retries 5 times. I have tried setting it on the on creation and it also doesn't work.

What am I missing?

Thanks!

await cloudQueue.CreateIfNotExistsAsync();

var linearRetryPolicy = new LinearRetry(TimeSpan.FromMinutes(5), 1);

var options = new QueueRequestOptions { RetryPolicy = linearRetryPolicy };

await cloudQueue.AddMessageAsync(new CloudQueueMessage(JsonConvert.SerializeObject(queueItem)), null, null, options, null);

Answer 1

I asked a colleague about this and he suggested that the retry policy probably relates to attempts to add the message to the queue and not to attempts to process the message from the queue.

I tested this by implementing IRetryPolicy and then disabling the storage emulator just before the call to AddMessageSync. Sure enough ShouldRetry is called after each failed attempt to add the message to the queue.

Hope this helps anyone who was similarly confused.