[LOG4J2-3073] Issues using Lookup Plugin in Json Template Logging

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.14.1
• Fix Version/s: 2.15.0
• Component/s: Configuration
• Assignee: Volkan Yazici
• Reporter: Paul Rubin
• Created: 15/Apr/21 13:13
• Updated: 26/Aug/21 14:07
• Resolved: 26/Aug/21 14:06

Description

I recently need to create a series of Plugins to be used in JsonTemplateLogging.  I am not sure which are documentation issues and which are bugs in the underlying code.

The first difficulty was in matching the name I did not see anything in the documentation about the case of the name.  If I used any capital letters in the name it becomes unmatchable.

The second issue is that you must cause a map replacement or the Lookup is never called and the defaultLookup is used and it simply returns the name of the lookup.

I could not find any syntax that would call the no event lookup method:

@Override
public String lookup(String key) {

Issue Links

• is related to: LOG4J2-3074 Add replacement parameter to mdc resolver