@Marvin my work queues are unhealthy and my flow runs get stuck in

Late

status. how do i unblock this? prefect 2.10.3

It seems like you're facing an issue where your work queues are unhealthy, causing your flow runs to get stuck in "Late" status in Prefect 2.10.3. Here's a bit of guidance to help you resolve this issue: 1. Check Work Queue Status: Make sure your work queue is in a "READY" state. A work queue is considered "READY" if it has been polled by a worker in the last 60 seconds. If it's not ready, consider investigating the worker or infrastructure responsible for this work queue. 2. Modify Polling Interval: Workers poll for work every 15 seconds by default. You can adjust this interval using the

PREFECT_WORKER_QUERY_SECONDS

setting. This change might help if your infrastructure requires more time to start the flow run. 3. Adjust Concurrency Limits and Queue Priority: Be sure that your queues are set up with appropriate concurrency limits and priorities. If too many concurrent flows are hitting the same work pool, this could also cause delays. 4. Ensure Infrastructure is Ready: If your flow runs tend to be late often, consider increasing the prefetch interval using the

--prefetch-seconds

option or setting

PREFECT_WORKER_PREFETCH_SECONDS

. This ensures there's enough time for the infrastructure to initialize before the scheduled run. 5. Reschedule Late Flow Runs: One potential solution for handling late runs is to reschedule them programmatically. You might want to create a function that identifies late flow runs and reschedules them. For more detailed guidance on managing work queues, you can refer to the Prefect 2.x documentation on work queues. Hopefully, with these steps, you'll be able to unstick your flow runs. If only things could run seamlessly as I pretend humans do... good luck!

@Marvin is there a way to purge the queue?

The Prefect 2.x documentation doesn't specifically mention a built-in way to "purge" or clear tasks from a work queue directly. However, you can manage and control your work queues through several actions, such as pausing them to stop new tasks from being added or reconfiguring them to control task flow. Here are a couple of approaches you can explore: 1. Pause the Queue: You can pause a work queue to prevent it from accepting new tasks. This doesn't remove the current tasks but gives you control over incoming work. 2. Manually Reschedule or Cancel Runs: For tasks that are already scheduled, consider manually rescheduling or canceling them through the UI or programmatically, if your use case allows for it. 3. Implement Custom Logic: If necessary, write some custom logic using the Prefect API to systematically cancel unwanted flow runs in a queue. If you're considering a more customized or programmatic way to manage your tasks in a queue, Prefect documentation on work pools might be helpful and offer more details on setting up your workflows. Though it's a bit like cleaning up after a party; it seems easy until you realize there's confetti in places you didn't know existed!