@Marvin I am using an ECS pushpool to run flows. For flows less than about 36 hours everything works fine and logs appear correctly on the prefect dashboard. However for longer running flows, the logging cuts off and the flow is stuck perpetually in a "running" state. The fargate container logs contain this error: 2024-03-16T095737.215-07:00 --- Error logging to API --- 2024-03-16T095737.215-07:00 Client error '401 Unauthorized' for url 'https://api.prefect.cloud/api/accounts/fec21252-7b14-4928-ab6b-31899d34d3bf/workspaces/a6358348-44e5-4473-b95a-6df0321e2ce4/logs/' 2024-03-16T095737.215-07:00 Response: {'detail': 'Invalid authentication credentials'} Are the credentials passed to the the fargate container somehow timing out? How can I correct this?

I have not found a direct answer from the Prefect documentation or open GitHub issues related to long-running flows cutting off logs and becoming stuck in a "running" state specifically on ECS pushpool with a '401 Unauthorized' error, but based on common issues with long-running tasks and logging cut offs in such systems, here are a few general suggestions that could alleviate the issue: 1. Authentication refresh: Ensure long-lived tokens or other authentication mechanisms are refreshed if they have an expiry. For Prefect, check the authentication management to see if there are parameters you can customize for longer lifetimes. 2. Version Check: As per the Prefect troubleshooting guide, check if your flow and worker/container are using compatible versions of Prefect. Incompatible versions can lead to unexpected behavior. 3. Keep Alive Intervals: If Prefect Cloud or the client has mechanisms to send keep-alive messages or similar periodic checks, ensure they are correctly configured to prevent timeouts from cloud-provided infrastructure. 4. Error Handling: Implement error handling in your logging to ensure that if a log fails to transmit, it is retried, or at least doesn't interfere with the state of the flow. 5. Consult the release notes: Check the release notes for any recent changes that might relate to push-work pools or ECS integrations which might have introduced bug fixes or changes relevant to your problem. Unfortunately, since this issue seems to be specific and there isn't an open GitHub issue about it, if none of these suggestions helps, I'd recommend opening a new GitHub issue with Prefect, detailing your problem. Include logs, flow configuration, and any other relevant information that could help Prefect's maintainers to troubleshoot the problem. If you'd like, I can assist you in that as well, just let me know.

@Marvin Are my fargate containers authentication with the prefect cloud tied to the work-pool configurations? How can I change these configs?

Your Fargate containers' authentication with Prefect Cloud is indeed connected to the configurations you set up for the work-pool. To change these configurations or set up the work-pool for long-running tasks, you can follow these general steps: 1. Go to the Preferences page in the Prefect UI. 2. Here, you can configure various aspects of work pool behavior, such as concurrency limits or pausing delivery, which can help manage long-running tasks better. 3. Ensure your work pool has the necessary set up to keep the authentication alive for as long as your flows are running. This may involve configuring environment variables, IAM roles, or secrets management in AWS that are accessible to your ECS tasks. 4. Also consider reviewing your Prefect agent setup, as the work pool types require a worker to be running on your infrastructure to poll a work pool for scheduled flow runs. If you need to update any Prefect CLI commands or deployments, refer to the Prefect Deployment Guide. Since no specific issues were identified on GitHub, if you have tried adjusting these settings and are still encountering authentication issues, I would recommend reaching out to Prefect support or opening a detailed issue on their GitHub repository. Here are the links to: - Work Pools Concepts - Prefect Deployment Guide By configuring these details properly, your long-running Fargate containers should maintain their connection to Prefect Cloud without an unexpected '401 Unauthorized' error due to authentication timeouts.

@Marvin If I don't explicitly pass my push-pool a prefect api key - how do the tasks that work-pool generates authenticate with my prefect cloud workspace? Should I pass PREFECT_API_KEY to my push-pool as an environmental variable?

When you create a push-based work pool, such as with ECS on AWS, Prefect does require authentication for the workers to communicate with the Prefect Cloud workspace. If you do not explicitly pass the Prefect API key, you should consider doing so to authenticate the tasks. You can pass the

PREFECT_API_KEY

to your push-pool as an environment variable. By providing this API key, you ensure that the workers spawned by your ECS service can authenticate with Prefect Cloud and report back on the progress and status of your flow runs. Here's what you should consider doing: 1. Include the

PREFECT_API_KEY

in the environment variables for your ECS task definition. 2. Ensure that the API key has the correct permissions for the operations your workers need to perform. This setup would allow the flow runs submitted to the specific work pool to be properly scheduled and executed, with workers communicating status updates to Prefect Cloud. For more detailed guidance on setting this up, please refer to the Prefect Push Work Pools Guide and the Work Pools & Workers Concepts documentation. Make sure to manage your API keys securely, and monitor their usage to avoid any security risks.