[LOG4J2-2849] Event Lookup Field not applying to JSON Layout additional Property

• Type: Question
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.10.0
• Component/s: Lookups
• Assignee: Unassigned
• Reporter: Peter Podniesinski
• Created: 20/May/20 19:53
• Updated: 22/May/20 15:19

Description

Hi, I have a requirement where we need to change the field name of our LogEvent from `message` to `text`. In the past we've done this by creating a new custom Layout that modifies the logEvent, however I was hoping I could do this with JSON Layout lookups to the Event data.

Here is a snippet of my log4j xml config. I've tried a few variations and the event variable is not recognized.

<RollingFile name="APPLOGFILE" fileName="logs/app/${hostName}/application.log" filePattern="logs/app/${hostName}/app-%d{MM-dd-yyyy}-%i.log.gz"> 
<JsonLayout complete="false" compact="true" eventEol="true" properties="true" stacktraceAsString="true"> 
   <KeyValuePair key="timestamp" value= "$${date:yyyy-MM-dd HH:mm:ss.SSS}"/>  
   <KeyValuePair key="text" value= "$${ctx:productId}"/> 
   <KeyValuePair key="text2" value= "${event:Message}"/> 
   <KeyValuePair key="text3" value= "$${event:Message}"/> 
</JsonLayout>

Context fields and date do indeed work.

 

Please let me know if I am misusing the lookup functionality or if there is a bug.
Also, if there is a better way to do this, that information would be helpful as well.

 

Thanks.