[jira] [Commented] (LOG4J2-2459) JsonLayout does not to produce classname, line and method

["Gary Gregory (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-2459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674088#comment-16674088 ] 

Gary Gregory commented on LOG4J2-2459:
--------------------------------------

If you want source information, use {{locationInfo="true"}} attribute on the JsonLayout element.

> JsonLayout does not to produce classname, line and method 
> ----------------------------------------------------------
>
>                 Key: LOG4J2-2459
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2459
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Appenders, Layouts
>    Affects Versions: 2.11.1
>         Environment: Java 8
>            Reporter: Genadi Saltikov
>            Priority: Major
>
> When we use a JsonLayout such as:
> {noformat}
>         <Kafka name="KafkaAppender" topic="topic1">
>         <JsonLayout compact="true">
>             <KeyValuePair key="service" value="some_app_tag"/>
>             <KeyValuePair key="@timestamp" value="${date:yyyy-MM-dd HH:mm:ss.SSS}"/>
>             <KeyValuePair key="host_name" value="${hostName}"/>
>             <KeyValuePair key="unique_id" value="$${map:name:-NA}"/>
>     </JsonLayout>
>         <Property name="bootstrap.servers">kafka1.com:9092,kafka2.com:9092,kafka3.com:9092</Property>
>     </Kafka>{noformat}
> That only adds stuff like the message to the output JSON.
> We tried various syntaxes to add \{{}}
> {noformat}
> %c{2}{noformat}
> {{}}, {{}}
> {noformat}
> %M{noformat}
> {\{ }}and \{{}}
> {code:java}
> %L{code}
> In various syntax variations, but they all just output the literals and are not being substituted.
>  
> The above placeholders do work in a Console Appender for example:
> {noformat}
> <Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
>     <PatternLayout>
>         <!-- {Timestamp} {Log Level} [{Thread Name}] [Execution/Error Id] {Class}.{Method}({FileName}:{Line}): {Message} /newline\ {Throwable/Exception} -->
>         <pattern>%23.23d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] [$${map:name:-NA}] %c{1}.%M(%F:%L): %highlight{%m%n%throwable}</pattern>
>     </PatternLayout>
> </Console>{noformat}
> We are thinking it has to be a bug or something, if we get no other indication we are going to try and work around this by re-implmenting the various log method signatures (error, fatal, debug etc) and using something along the lines of: 
> {code:java}
> StringMapMessage mapMsg = new StringMapMessage();
>     mapMsg.put("method", "get the value somehow inside the custom logging method implementation");
>     LOGGER.fatal(mapMsg);
> {code}
> Does that make sense?
>  
> This is the doc link we've been following, which seems not precise enough:
> [https://logging.apache.org/log4j/2.x/manual/layouts.html#JSONLayout]
> line, method etc are obviously outputted for an exception log with stack trace, but not for a regular log message which does not contain some Exception based object.



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