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

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Type: Improvement
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 2.18.0
Component/s: Appenders
Labels:
None
Environment:

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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

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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

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

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