Priya Ahuja created LOG4J2-1460:
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Summary: Multiple structured data elements in syslog while using
combination of StructuredDataMessage and MDC
Key: LOG4J2-1460
URL: https://issues.apache.org/jira/browse/LOG4J2-1460
Project: Log4j 2
Issue Type: Bug
Affects Versions: 2.6.1
Reporter: Priya Ahuja
Hi,
I am using Log4j 2.6.1 and while using StructuredDataMessage in combination
with MDC, I am noticing duplicate structured data fields if the mdcId
mismatches. If the mdcId is the same in log4j2.xml and StructuredDataMessage
then the log is dropped all together.
Expected behavior:
If mdcId in log4j2.xml and "id" parameter of StructuredDataMessage matches then
only 1 structured data element must be created that combines the two
configuration.
Output:
- When keys are different (Notice two structured data fields)
<182>1 2016-07-12T00:22:35.451Z nsx-manager NSX - - [nsx1@6876
comp="nsx-manager"][nsx@6876] One delta state sync provider is registered
-When keys are the same:
No log is seen
Log4j2.xml Syslog appender:
<Syslog name="RFC5424" format="RFC5424"
host="localhost"
port="514"
protocol="UDP"
appName="NSX"
facility="LOCAL6"
enterpriseNumber="6876" newLine="true"
messageId="-" id="-" includeMDC="true" mdcId="nsx1">
<ThresholdFilter level="INFO"/>
</Syslog>
Facade Code:
private Message format(String msg) {
return new StructuredDataMessage("nsx", msg, "-");
}
public void log(Level level, String msg) {
if (log4jLogger.isEnabled(level)) {
ThreadContext.put("comp", "nsx-manager");
log4jLogger.logMessage(FQCN, level, null, this.format(msg), null);
ThreadContext.clearAll();
}
}
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