Catch exception DagsterInvalidDefinitionError

[kennycontreras]

Hello everyone 👋

I'm working on applying some minor improvements to a Dagster environment, and I'd like to be able to catch an exception when Dagster, for example, finds a duplicated job name. By default, this will raise DagsterInvalidDefinitionError

I've been trying to catch the exception without luck.

Here's an example of my repo.py file to load the pipelines

  if "py" in file:
      try:
          # code to add the pipelines to the Dagster environment... 
          ##
          ####
      except (ImportError, TypeError, ModuleNotFoundError, NameError, DagsterInvalidDefinitionError):
          logging.exception(f"Failed importing: {file}")
          continue

All the other exceptions work but not DagsterInvalidDefinitionError.
I've tried importing DagsterInvalidDefinitionError from the Dagster library and even from the _core module.

Does anyone have any tips or has tried something similar?

Thanks!

[garethbrickman]

A couple things to troubleshoot:

1. Ensure that you are importing DagsterInvalidDefinitionError from dagster.core.errors.
2. Verify that the code which might raise the DagsterInvalidDefinitionError is indeed within the try block.
3. Add a generic except Exception as e clause to your try block to catch all exceptions and log them. This can help you determine if the DagsterInvalidDefinitionError is being raised at all and if it is being caught by the more generic Exception class.