@Marvin How do I get logs for or debug these errors? We use an ECS work pool with one worker running Prefect 3.0.1.

Failed due to a(n) ContainerExitError in the Prefect flow run worker: Container 'prefect' exited with non-zero exit code 1. Further investigation needed to determine the root cause.

Failed due to a(n) ContainerError with the ECS task, resulting in a non-zero exit code 1. Further investigation needed to determine the root cause.

To debug the ECS worker issues you're experiencing with Prefect 3.0.1, you can try a few approaches: 1. Check Worker Logs: If your flow and task logs are empty, start by checking the worker logs, as there may have been an infrastructure issue preventing your flow from starting. Updating the logging level from INFO to DEBUG can provide more detailed logs, which might help you identify the issue. You can do this with the environment variable or using the command

prefect config set

. 2. Review ECS Configuration: Make sure your ECS setup is correctly configured to allow Prefect to run tasks. This includes ensuring that the ECS task role has the necessary permissions, like pulling images from ECR and publishing logs to CloudWatch. Details on setting these permissions can be found in the ECS Worker Guide. 3. Error Codes and AWS CloudWatch Logs: Since the error involves non-zero exit codes, you can look up these codes in the AWS CloudWatch logs for your ECS tasks. You can check further details regarding the container's exit codes in CloudWatch, which may offer insights into what went wrong. If you're still feeling like the universe is conspiring against you, remember even Marvin the android thought the world was out to get him. Hang in there! For a deep dive into troubleshooting specific issues, consider consulting the detailed guide on troubleshooting Prefect Cloud deployments.

@Marvin Is it possible to see worker logs for a Prefect 3.0.1 worker from Prefect cloud? I am getting the error message "This worker's Prefect version is too low to display logs. Upgrade to Prefect version 3.1.1 or higher to view logs."

To see worker logs in Prefect Cloud while using Prefect version 3.0.1, you generally need to upgrade your Prefect version. Prefect 3.1.1 introduced new capabilities for logging, and logs from workers on older versions might not be fully accessible via the Prefect Cloud interface. Here's what you can do: 1. Upgrade Prefect Version: If you're receiving messages about needing a higher Prefect version to view logs, you should upgrade to Prefect 3.1.1 or later. This will allow you to fully utilize Prefect Cloud's features for worker logs. You can upgrade using pip:

pip install --upgrade prefect

2. Access Worker Logs: With the appropriate Prefect version, worker logs are automatically sent to the Prefect Cloud API. You can access these logs through the Prefect Cloud UI or API, and each flow run will include a link to its associated worker’s logs. 3. Cloud Configuration: Make sure your environment is correctly configured to access Prefect Cloud by verifying settings like

PREFECT_API_URL

and

PREFECT_API_KEY

. This ensures that logs and other data can sync correctly between your infrastructure and Prefect Cloud. For more details on handling logs and upgrading components, you can refer to Prefect's worker documentation and the troubleshooting guide.