[LOG4J2-2588] Unable to reinstate old timeMillis timestamp using log4j2.clock property in JSON layout

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.13.2
• Assignee: Ralph Goers
• Reporter: Simon Wydooghe
• Created: 12/Apr/19 07:56
• Updated: 20/Apr/20 03:59
• Resolved: 19/Apr/20 21:24

Description

As per the changes listed in https://logging.apache.org/log4j/2.0/changes-report.html#a2.11.0, it seems the timestamp is now being reported as "instant":{"epochSecond":1555050778,"nanoOfSecond":738424000} (for instance) in the JSON output.

I'd like to however revert back to the old timeMillis format because it's easier to parse using a log forwarder. As per the documentation found, it seems I should be able to use log4j2.clock=SystemMillisClock property to revert this behaviour. That doesn't seem to work though. I've tried both variants of the property I could find in the docs (log4j.Clock and log4j2.clock).

Am I misinterpreting the documentation? I just want an easy way to get back the timeMillis.