The nifi.properties file in the conf directory is the main configuration file for controlling how NiFi runs. This section provides an overview of the properties in this file and includes some notes on how to configure it in a way that will make upgrading easier. After making changes to this file, restart NiFi in order for the changes to take effect.
The contents of this file are relatively stable but do change from time to time. It is always a good idea to review this file when upgrading and pay attention for any changes. Consider configuring items below marked with an asterisk (*) in such a way that upgrading will be easier. For details, see a full discussion on upgrading at the end of this section. Note that values for periods of time and data sizes must include the unit of measure, for example "10 secs" or "10 MB", not simply "10".