Decanter 2.x - Documentation - 24 1.3.3. FILE The Decanter File appender stores the collected data in a CSV file. The decanter-appender-file feature installs the file appender: karaf@root()> feature:install configuration file. You can also change the marshaller to use. By default, the marshaller used is the CSV one. But you can switch to the JSON one using the marshaller.target property in etc/org