[LOG4J2-412] RollingRandomAccessFile appender loses output when fileName/filePattern accesses ${sys:property}

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-beta9
• Fix Version/s: 2.0-rc1
• Component/s: Appenders
• Labels: Rollover

Environment

Windows 7, JDK 1.7.25

• Assignee: Remko Popma
• Reporter: bryan headley
• Created: 27/Sep/13 12:27
• Updated: 06/Aug/14 14:59
• Resolved: 06/Aug/14 14:59

Description

Using sample config for RollingRandomAccessFile, with log name retrieved from enviroment variable "Fubar"...

    <RollingRandomAccessFile name="RollingRandomAccessFile" 
        fileName="logs/${sys:Fubar}.log"
        filePattern="logs/$${date:yyyy-MM-dd}/${sys:Fubar}-%d{MM-dd-yyyy}-%i.log.gz">

Along with a harness program,

    public static void main(String[] args) {
        for (int i=0; i < 100000; i++) {
            logger.info("Logger writes message for the nth time " + i);
        }
        System.out.println("Done");
    }

If I use ${sys:Fubar}, instead of, say a literal value, the contents of the first rolled file are lost. I had SizeBasedTriggeringPolicy set to 1 MB, meaning, 21296 log messages were lost.

Issue Links

• is related to: LOG4J2-531 Rolled log files overwritten by RollingFile appender with composite time and size based policies