[LOG4NET-681] RollingFileAppender thread safety issue

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 1.2.10, 1.2.11, 1.2.12, 1.2.13, 1.2.14, 1.2.15
• Component/s: Appenders
• Assignee: Unassigned
• Reporter: Tom Judge
• Created: 09/Dec/21 17:36
• Updated: 22/Jul/22 14:05
• Resolved: 22/Jul/22 14:05

Description

It seems there is a thread safety issue in :

protected void RollOverTime(bool fileIsOpen)

Where the file can be closed outside of a critical section allowing another thread to attempt to write data on a closed file handle leading to this err:

log4net:ERROR [FileAppender] Attempted to append to closed appender named [].