You cannot directly set the status of a Flyte workflow to failed from within a task based on its output. Workflow status is determined by the success or failure of its nodes (tasks, subworkflows, etc.), and Flyte does not provide an explicit API to programmatically set the workflow status from inside a task. However, you can design your workflow so that if a task returns an output indicating failure, you raise an exception in a downstream node or use conditionals to trigger a failure, which will cause the workflow to fail accordingly. If you want to execute custom logic on failure (e.g., cleanup), you can use the failure node feature by specifying an

on_failure

handler in your workflow, but this does not allow you to arbitrarily set the workflow status; it only reacts to actual failures in execution. For more, see the failure node documentation and workflow basics. Would you like more detail or example code for handling this pattern? Sources: - failure node documentation - workflow basics 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.

@ancient-wolf-19325 Can you give me an example of using failure node

Yes. To use a failure node in Flyte, define a cleanup task and set it as the

on_failure

handler in your workflow. The failure node will execute if any task in the workflow fails. The cleanup task's inputs must match the workflow's inputs, and it can also accept an

err

parameter for the error message. This feature is available in Flyte 1.10.7 and later. See the official example:

from flytekit import task, workflow

@task
def clean_up(name: str, err: str = None):
    print(f"Cleaning up {name} due to error: {err}")

@task
def will_fail(name: str):
    raise Exception("Intentional failure")

@workflow(on_failure=clean_up)
def my_wf(name: str):
    will_fail(name=name)

If

will_fail

fails,

clean_up

will be executed automatically. Would you like a more detailed breakdown or explanation? Sources: - failure node documentation 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.