<@ULVA73B9P> I keep getting this error when I run ...
# ask-marvin
k
@Marvin I keep getting this error when I run a flow in a deployment. Any idea why?
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GlobalEventLoopThread | prefect._internal.concurrency - Service 'EventsWorker' failed with pending items.
m
It seems there are no open GitHub issues that directly match the error message you've encountered. This could be a unique situation or a relatively new problem that hasn't been reported yet. Since I don't have any existing issues to refer to, I'd like to suggest checking for the following common potential causes of the problem: 1. Concurrency Issues: The error indicates that a service (
EventsWorker
) has failed while there are still pending items in the event loop. This might be due to concurrency control issues where the event loop is being closed or blocked before all asynchronous tasks are completed. 2. Code Issues: Check your flow and task definitions to ensure that you are not unintentionally blocking the event loop or creating a deadlock situation with resource handling. 3. Resources Overload: Verify that there are sufficient system resources (like memory, file descriptors) and that these resources are managed correctly throughout the lifecycle of the flow. 4. Framework Bugs: While no relevant issues have been reported, the problem might still be a bug in the Prefect framework itself, perhaps one that has not been identified or fixed yet. 5. Version Compatibility: Ensure that the libraries you're using are compatible with the version of Prefect you're running. Sometimes, version incompatibilities can lead to unexpected errors during runtime. 6. Improper Shutdown: Examine whether the event loop is being shut down properly at the end of your flow runs or if there are tasks that might be lingering and causing the event loop to hang. If none of these suggestions lead to a resolution, you might want to consider creating a new issue on the Prefect GitHub repository to get assistance from the developers or the community. When reporting the issue, provide detailed information about your environment, Prefect version, and a minimal code snippet to reproduce the problem, if possible. This will facilitate others to help you more effectively.