[LOG4J2-3359] Facility and priority missing in Syslog message when Syslog log appender and pattern layout is used with log4j1-2 bridge API

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.18.0
• Component/s: Appenders

Environment

This issue is reproducible with log4j-2.17.1 & log4j-2-17-2

JDK 1.8

-Dlog4j1.compatibility=true

log4j.properties file :-

log4j.rootLogger=DEBUG,SYSLOG

log4j.appender.SYSLOG=org.apache.log4j.net.SyslogAppender
log4j.appender.SYSLOG.Threshold=DEBUG
log4j.appender.SYSLOG.SyslogHost=localhost:514
log4j.appender.SYSLOG.protocol=UDP
log4j.appender.SYSLOG.Facility=LOCAL1
log4j.appender.SYSLOG.layout=org.apache.log4j.PatternLayout
log4j.appender.SYSLOG.layout.ConversionPattern=${hostName} MyMain[%pid] :%t: %c %-4p - %m%n

• Assignee: Piotr Karwasz
• Reporter: Tukesh
• Created: 21/Jan/22 12:54
• Updated: 02/May/22 21:09
• Resolved: 31/Mar/22 20:14

Description

FACILITY and PRIORITY is not included when log4j bridge API sends SysLog message. Please find the attached pcap files.

Issue Links

• is duplicated by: LOG4J2-3436 Log4j 2 syslogAppender prints localhost.localdomain instead of actual hostname
• is required by: LOG4J2-3419 Unable to create custom logging level using log4j 2 Bridge API
• links to: GitHub Pull Request #807