[LOG4J2-479] Use of InheritableThreadLocal in Map ThreadContext is dangerous and unhelpful

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0-rc1
• Assignee: Remko Popma
• Reporter: MK
• Created: 27/Dec/13 23:34
• Updated: 01/Jul/14 15:27
• Resolved: 12/Jan/14 16:19

Description

Described here http://logging.apache.org/log4j/2.x/manual/thread-context.html
The use of InheritableThreadLocal creates subtle and hard to track bugs while not really adding much useful. It is counterintuitive – I don't see why would anyone expect logging context to be inherited. But it breaks down completely when used with Thread Executors.