Log4j2 Json Layout Custom Fields, I tried putting the following in log4j2. Log4j 2. If a YAML file cannot be located the JSON ConfigurationFactory will look Structured logging By leveraging log4j2's MapMessage or even by implementing your own MultiformatMessage with JSON support, you can add additional fields to the resulting JSON. I am not sure how to implement the same in log4j2. org/log4j/2. Layouts An Appender uses a Layout to format a LogEvent into a form that meets the needs of whatever will be consuming the log event. json file. You can format the printed message as you wish with the layout. Can I customize the JSON output with Log4j2 JSONLayout? Yes, Log4j2 JSONLayout allows for customization of the JSON output. It is feature-rich, faster, and Usage Adding log4j-layout-template-json artifact to your list of dependencies is enough to enable access to JsonTemplateLayout in your Log4j configuration: This tutorial covers Log4j2 JSONLayout Properties with Examples.

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