[BEAM-526] Mismatched pipelines give unclear error

• Type: Bug
• Status: Open
• Priority: P3
• Resolution: Unresolved
• Component/s: sdk-py-core
• Labels: starter
• Assignee: Unassigned
• Reporter: Ahmet Altay
• Created: 04/Aug/16 00:57
• Updated: 03/Jun/22 16:25

Description

Mistakenly mixing two pipeline gives an unclear error. This is an error, however we should improve the error message.

This could be reproduced by trying to flatten two things from different pipelines.

Improve the message for this assert:
https://github.com/aaltay/incubator-beam/blob/python-sdk/sdks/python/apache_beam/transforms/util.py#L135