Maxim Novikov created LOG4J2-949:
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Summary: No MDC parameters in Syslog
Key: LOG4J2-949
URL: https://issues.apache.org/jira/browse/LOG4J2-949
Project: Log4j 2
Issue Type: Bug
Components: Appenders
Affects Versions: 2.1
Environment: Ubuntu 12
Reporter: Maxim Novikov
Priority: Critical
I cannot see thread context specific parameters (MDC) with the Syslog appender.
Here is my configuration:
{code:title=log4j2.xml|borderStyle=solid}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%X{my-mdc-key} %d{HH:mm:ss.SSS} %-5level
[%logger{1.}] %msg%n" />
</Console>
<Syslog name="Syslog"
format="RFC5424"
host="localhost"
port="514"
protocol="UDP"
id="my-id"
mdcId="mdc"
mdcRequired="my-mdc-key"
enterpriseNumber="1000"
newLine="true"
appName="my-app">
<LoggerFields>
<KeyValuePair key="thread" value="%t" />
<KeyValuePair key="category" value="%c" />
</LoggerFields>
</Syslog>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="Console" />
<AppenderRef ref="Syslog" />
</Root>
</Configuration>
{code}
I can see my-mdc-key's value in the terminal just fine (as well as other MDC
custom parameters if I need to), but there is none is syslog's log file.
The same concerns the LoggerFields collection. I have added it just to try
overcoming the issue with MDC, but also can't see any of those through syslog.
I have tried to play with "mdcId", "mdcRequired", "mdcRequired", but with no
success. The only thing for sure is that my MDC custom fields do exist in the
context, as I can see them in the console, as well as Syslog appender starts
with not exception when I specify them through "mdcRequired" field.
PS Just to clarify, the messages do get delivered to the syslog, but no MDC and
no custom logger fields there.
Marked as "Critical" as we will have to migrate to logback or another framework
if it is not going to work, as this functionality is required for us.
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