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

After reviewing the example, it looks like modifying the dependencies should fix the problem <dependencies> <!-- Testing/Mocking --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-mock</artifactId> <version>${nifi.version}</version> </dependency> <!-- NiFi Dependencies --> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-api</artifactId> </dependency> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-utils</artifactId> </dependency> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-processor-utils</artifactId> </dependency> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-distributed-cache-client-service-api</artifactId> <version>${nifi.version}</version> </dependency> <!-- NiFi DBCP Service --> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-dbcp-service</artifactId> <version>0.4.0</version> </dependency> <dependency> <groupId>org.apache.nifi</groupId> <artifactId>nifi-utils</artifactId> <!-- <version>${nifi.version}</version> --> </dependency> <!-- Helper Services --> <dependency> <groupId>x-y</groupId> <artifactId>y-z-common</artifactId> <version>${y.version}</version> </dependency> <dependency> <groupId>x-y</groupId> <artifactId>y-core</artifactId> <version>${y.version}</version> </dependency> <!-- Custom Processor Dependencies --> <dependency> <groupId>net.sourceforge.javacsv</groupId> <artifactId>javacsv</artifactId> </dependency> </dependencies> I assumed that you would just import the jars, but wiring dependent nars sounds like the best way to go. Could you take a look at the dependencies section of my pom and give pointers on how to convert the nifi-dbcp-service dependency into a nar dependency? ... View more