Core: Importing ray causes critical log messages to not be shown

[klieret]

What happened + What you expected to happen

Simply importing ray hides all log messages in the newest ray version when importing a logger.
This is a new issue with ray 2.6.xx (I can confirm that this issue does not appear with 2.5.1).

This sounds somewhat similar to #17374, but here ray isn't even initialized (and the solution presented there does not work).

Versions / Dependencies

• ray 2.6.1 (not an issue with 2.5.1)
• py 3.11.3

Reproduction script

Create file log.py:

import logging

logger = logging.getLogger("test")

Create file test_log.py:

from log import logger
# import ray

logger.critical("This is bad")

Executing test_log.py like this causes the log message to be shown (as expected).
However, uncommenting import ray, no more log message is shown.

Issue Severity

High: It blocks me from completing my task.

[richardliaw]

This seems similar to #37920.

[jjyao]

This should be a duplicate of #37941. This has been fixed in master and will be released in 2.6.2 soon.

[klieret]

Thanks @richardliaw @jjyao . Accidentally had an is:open filter in my issue search, I realized. Sorry for the duplicate!

[xieus]

@klieret Ray 2.6.2 is released today with an proper fix.
https://github.com/ray-project/ray/releases/tag/ray-2.6.2

Please check it out and let us know how it goes. Thank you for your patience and understanding.