[jira] [Created] (LOG4J2-2136) Add support for values in MDC in JSONLayout KeyValuePairs

[Daniel Kirkdorffer (JIRA)]

Daniel Kirkdorffer created LOG4J2-2136:
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             Summary: Add support for values in MDC in JSONLayout KeyValuePairs
                 Key: LOG4J2-2136
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2136
             Project: Log4j 2
          Issue Type: Improvement
          Components: Layouts
    Affects Versions: 2.10.0
            Reporter: Daniel Kirkdorffer


The new KeyValuePair within JSONLayout as implemented for 
https://issues.apache.org/jira/browse/LOG4J2-1694 doesn't provide support for 
MDC stored values.

In PatternLayout one can do something like this:

{{<Pattern>%d{ISO8601}{UTC} %d{Z}{UTC} [CID:%X{conversation-id}] [%t] %-5p 
%c{1.} - %m%n</Pattern>}}

But it seems that

{{<KeyValuePair key="CID" value="%X{conversation-id}"/>}}

or even

{{<KeyValuePair key="CID" value="${conversation-id}"/>}}

doesn't work.

Variable replacement doesn't appear to read from the MDC.



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