Preserve Custom Processors

If you have any custom NARs, preserve them during upgrade by storing them in a centralized location as follows:

1. Create a second library directory called custom_lib.

2. Move your custom NARs to this new lib directory.

3. Add a new line to the nifi.properties file to specify this new lib directory:

   nifi.nar.library.directory=./lib
   nifi.nar.library.directory.custom=/opt/configuration_resources/custom_lib