Custom processor: IOUtils cannot be resolved

rafy — Tue, 21 Apr 2026 07:52:21 GMT

Hello,

Please kindly help to resolve this error.

I am trying to learn how to create a Nifi custom processor following this tutorial:

https://help.syncfusion.com/data-integration/how-to/create-a-custom-processor#_Project_Creation%22%22

But i don't know the class to import to solve the below error:

Below are all the imports i have on the file

import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.annotation.behavior.ReadsAttribute;
import org.apache.nifi.annotation.behavior.ReadsAttributes;
import org.apache.nifi.annotation.behavior.WritesAttribute;
import org.apache.nifi.annotation.behavior.WritesAttributes;
import org.apache.nifi.annotation.lifecycle.OnScheduled;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
import org.apache.nifi.annotation.documentation.SeeAlso;
import org.apache.nifi.annotation.documentation.Tags;
import org.apache.nifi.processor.AbstractProcessor;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processor.ProcessSession;
import org.apache.nifi.processor.ProcessorInitializationContext;
import org.apache.nifi.processor.Relationship;
import org.apache.nifi.processor.util.StandardValidators;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.nifi.processor.io.StreamCallback;
import org.apache.nifi.processor.exception.ProcessException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

Thanks for your kind help

Re: Custom processor: IOUtils cannot be resolved

rafy — Wed, 27 Jul 2022 10:29:47 GMT

Thanks everyone.

I have solved the problem by including dependency on the pom.xml files of nifi-custom-processors & nifi-custom-nar. The dependency is like this.

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.11.0</version>
</dependency>

question Custom processor: IOUtils cannot be resolved in Support Questions

Custom processor: IOUtils cannot be resolved

Re: Custom processor: IOUtils cannot be resolved