I have read some documentation and this looks correct. Tf I wanted to create a custom processor that leverages the DBCPConnectionPool Controller Service, I believe these are the correct dependences to include: <!-- NiFi DBCP Service --> <!-- DBCP API --> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-dbcp-service-api</artifactId> <version>${apache.nifi.version}</version> </dependency> <!-- DBCP NAR --> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-dbcp-service-nar</artifactId> <version>${apache.nifi.version}</version> <type>nar</type> </dependency> ... View more