[BEAM-3399] Documentation wrong for Session Windows (Python SDK)

• Type: Bug
• Status: Resolved
• Priority: P3
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: Not applicable
• Component/s: examples-python
• Labels: starter
• External issue URL: https://beam.apache.org/documentation/programming-guide/#setting-your-pcollections-windowing-function
• Assignee: Ahmet Altay
• Reporter: Ralf Hein
• Created: 28/Dec/17 23:39
• Updated: 16/May/20 13:25
• Resolved: 15/Sep/19 05:11

Description

The documentation for setting Session Windows via python SDK is wrong (Section 7.3.3).

https://beam.apache.org/documentation/programming-guide/#setting-your-pcollections-windowing-function

It says "time gap of at least 10 minutes" when introducing the example code, but the code actually only sets a duration gap of 10 seconds.

Reason: The duration needs to be passed in seconds, not minutes. So the example code should read something like this:
beam.WindowInto(window.Sessions(10*60)))

Took me quite some time to figure this out ...