exception.log missing

[siliconalchemy]

Preconditions and environment

• Magento version 2.4.5
• PHP 8.1 (FPM)
• Apache2.4
• Ubuntu 20.04

This Magento install has

Steps to reproduce

Trigger an exception/error (for example reCAPTCHA error detailed in #34975), or make generated/ directory read-only to trigger a read-only error.

Expected result

I expect to see an error and trace in var/log/exception.log

Actual result

No exception.log exists. Errors do seem to appear in system.log, but I don't know if they are everything that should be in exception.log.

Additional information

This instance of Magento has been updated since 2.0 to 2.2 and 2.4. In the past exception.log was always present with errors/exceptions.

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @siliconalchemy. Thank you for your report.
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[amokato]

We have the same issue since 2.4.3-p1 / 2.4.4

[adriansanta]

Same here. 2.4.4 EE. We suspect there is a gap between the preg_match used in module-support and some new log formatting. The matching expressions might need an update to start working correctly again.

[kamephis]

We tested that on a vanilla 2.4.4 (Community) in the exception.log is not written there. Would be nice to get some feedback from Magnet here. It's difficult to debug stuff when there is no clue about what happens.

[amokato]

Any updates on this? Nobody seems to care about such a severe issue.

[hostep]

@sdzhepa: can we have somebody to verify this? This indeed sounds like a P0 or P1 prio if it's true. Thanks!

I can not confirm that this is true on Magento 2.4.3-p3 on production shops of ours, it works as expected over there. We haven't tried 2.4.4 or 2.4.5 yet in production, so I can't speak about those versions yet.

[amokato]

We're having this issue on 2.4.4 (CE). It seems that some errors are written to the system.log.

[kamephis]

In our case the exceptions seem to be written into the system.log instead of the exception.log (2.4.4 CE). The exception.log stays empty.

[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[engcom-November]

Verified the issue on fresh instance of 2.4.5 Project-community-edition and the issue is reproducible. exception.log file is missing in var/log folder. No errors are written into exception.log. Only all errors are written into system.log file.
Note: There is no issue when the Magento is upgraded to 2.4.5 from 2.4.3 Project-community-edition. exception.log file is present in this case and all the errors/exceptions are getting written into exception.log file as expected.
Hence confirming this issue.