How do you throw an error from a Notebook so a Data Factory pipeline knows to stop running?

[arpost]

Greetings, all. I am wanting a notebook to throw an error if a condition isn't met, and I want that error to show in a Data Factory pipeline that is triggering the notebook. How can I do this?

[Anonymous]

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[frithjof_v]

I think you can use exit value in Notebook.

And then use the Notebook exit value as input for an IF Condition activity in your data pipeline.

https://community.fabric.microsoft.com/t5/Data-Pipelines/Referencing-notebook-exit-value-as-a-variab...

[arpost · Accepted solution]

Thanks for the reply, @frithjof_v. The challenge there is I'd then need to add logic in the pipeline to evaluate whether or not the exit value output indicates an error.

The solution I found (which I found somewhere on the internet that I don't recall) is to use raise Exception("Error message here"). Here's a modified version of the code block; the vars are just fake examples of operations I am performing:

if var == None:
  raise Exception("No match found.")
else: 
    var2 = var

This sends the exception back as an error to the pipeline so the Notebook activity actually fails, which is handy.

[frithjof_v]

Nice, thanks for sharing!