<@ULVA73B9P> i'm running my flow on kubernetes. al...
# ask-marvin
e
@Marvin i'm running my flow on kubernetes. although i don't have any subflow for it, prefect automatically creates subflows while running the flow. and for some reason job pod never gets completed and it keeps re-running my flow function. why?
m
Oops, it looks like some tools weren't cooperative this time around. Let's try to untangle the mystery of your ever-running Kubernetes flow. In Prefect, sometimes a flow might seem to create subflows or not complete if there's an issue with task retries or if the main flow is unable to signal completion due to some condition not being met. Here are some potential reasons and tips to troubleshoot: 1. Check Retries: Ensure that your flow or tasks aren't set up to retry indefinitely. A high retry count could make it look like the flow is creating subflows or continuously running. 2. Flow Completion: Ensure that all tasks in your flow are reaching a successful state. If some tasks are failing and not being handled correctly, the flow may not complete as expected. 3. Inspect Logs: Look at the logs of your Kubernetes Pod and the Prefect logs (if directed to an external logging service) to see if there are error messages or unusual activity that could hint at the underlying issue. 4. Kubernetes Configuration: Sometimes, the job's pod configuration might be causing it to restart. Check the pod's specification for restart policies and make sure they're set appropriately (e.g., Never or OnFailure depending on your needs). 5. Workflow Misconfiguration: Sometimes, not terminating correctly could relate to how the flow or tasks are set up in Prefect. Double-check your configurations. To get specific advice tailored to the issue, you may want to search the Prefect documentation or their GitHub issues. If you're in a quirky hypothetical universe and the computer tells you, "I'm sure you can fix this; I'm just not going to help," then remember, persistence is key! Feel free to ask more questions on specific configurations or errors you might see!
e
@Marvin this issue happens if i have finally statement at the end of my flow. why
m
It seems like the "finally" statement in your flow might be causing some unintended behavior due to how Prefect handles flow and task completion. From the documentation insights I found, here's what could be going on: 1. Flow Final State Handling: In both Prefect 2.x and 3.x, the final state of a flow run is determined either by the return value of the flow or manually set states. However, introducing a "finally" block can sometimes lead to inconsistencies if exceptions or states aren't handled properly within the block. 2. Use of "Finally": The "finally" block in Python executes no matter what, which might be causing issues with the completion signals of the flow. If your flow isn't seeing its natural completion or is altered by what happens in the "finally" section, it might lead to repeated runs. 3. Debugging Approach: Review what actions are performed in the "finally" block. If there are operations that modify the flow's final state or I/O tasks that might retry, these might keep your flow from completing gracefully. 4. Handling Exceptions: Ensure that exceptions are properly caught and handled within your flow to prevent them from surfacing to the "finally" and causing unwanted retries or restarts. Given these dynamics, consider refactoring portions of your flow logic that use "finally" to manage its state more explicitly and see if those changes prevent the repeated execution. For more specific guidance, I encourage checking the Prefect documentation related to flow best practices and what determines flow completion. If quirky issues persist, perhaps the source control is sentient—an interesting but improbable twist! Let me know if there's anything more specific you’d like to dive into!