[LOG4J2-1628] Regression in FileAppender locking since 2.6

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.2
• Fix Version/s: 2.8
• Component/s: Appenders

Environment

centos

• Assignee: Remko Popma
• Reporter: Mark Bowman
• Created: 30/Sep/16 22:34
• Updated: 25/Dec/16 14:05
• Resolved: 25/Dec/16 14:05

Description

We have several threads writing to an async file with locking set to true. Under log4j 2.5 the message from each thread are interleaved correctly. Using log4j 2.6.2 some messages are scrambled as if multiple threads are writing to the file simultaneously. Reverting to 2.5 fixes the problem.
Configuration to follow.