@Marvin, when running a prefect deployment i am getting the following error running a flow

encountered an exception: ValueError('signal only works in main thread of the main interpreter')

what does this mean?

The error message "ValueError: signal only works in main thread of the main interpreter" indicates that your code is attempting to use Python's signal module in a thread that isn't the main thread. This is a limitation in Python, where signal handlers can only be set in the main thread. This issue has been a known problem in Prefect, particularly when running asynchronous tasks or using threading. It can occur if your flow is executing in a context that involves threading, and a signal is being registered outside of the main thread. To resolve this, ensure that any signal handling logic is only executed in the main thread. If you're using Prefect's task runners or other concurrency mechanisms, you might need to adjust where and how signals are being registered. For more context, you can refer to this related GitHub issue: Don't attempt to register signals in non-main thread. If you're encountering this in a specific context or setup, sharing more about your environment might help in providing more targeted advice.