Root Configuration Directory
Payara Micro is distributed as a single JAR file. However, at runtime, it creates and depends on a folder structure that is referred to as Root Configuration Directory or
This directory stores all of the instance configuration, deployed applications, as well as implementation JAR files needed for running the instance.
By default, Payara Micro will create a folder in the system’s temporary directory and prepares a root configuration directory there. This makes instances' configuration stateless, but also has two potentially undesirable effects:
Temporary directory may be deleted by system cleanup procedure. It is therefore important not to use a temporary directory in production scenarios. If files are removed by a third party process, the application will not behave correctly anymore.
Preparing the directory has an impact on startup time
Root configuration directory can be explicitly specified with the command line parameter
In such case, the directory is created only once, and instance configuration is preserved across restarts of the instance.
Following configuration is preserved:
Effects of preboot, postboot and post-deploy commands