question Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" . in Archives of Support Questions (Read Only)

I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

mpandit — Tue, 21 Apr 2026 12:30:40 GMT

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

andrewg — Wed, 22 Jun 2016 22:06:22 GMT

Hi, is it a custom processor or one of the standard ones?

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

mpandit — Wed, 22 Jun 2016 22:42:01 GMT

Its a custom processor.

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

andrewg — Wed, 22 Jun 2016 23:12:40 GMT

Are you declaring any relationships? Don't forget to add it to the list of supported ones returned from one of the callbacks. If you can post a link or share the code somewhere, that would be very helpful.

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

mpandit — Wed, 22 Jun 2016 23:45:31 GMT

Just added relevant lines here.

public static final Relationship SUCCESS = new Relationship.Builder().name("SUCCESS")

.description("Success relationship").build();

if (msgText != null) {

FlowFile flowFile = session.create();

flowFile = session.write(flowFile, new OutputStreamCallback() {

public void process(final OutputStream out) throws IOException {

try {

out.write(msgText.getText().getBytes());

} catch (Exception e) {

e.printStackTrace();

}

});

session.getProvenanceReporter().receive(flowFile, context.getProperty("MyProp").getValue());

session.transfer(flowFile, REL_SUCCESS);

}

queueConn.close();

session.commit();

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

andrewg — Thu, 23 Jun 2016 00:08:29 GMT

Can you check you properly publish this relationship, too? E.g. see how I am doing it here (and the getRelationships() method that follows) https://github.com/aperepel/nifi-csv-bundle/blob/master/nifi-csv-processors/src/main/java/org/apache/nifi/processors/csv/ParseCSVRecord.java#L141

Re: I am getting the following exception building data flow in NiFi "Processor does not support any relationships" .

mpandit — Thu, 23 Jun 2016 00:44:25 GMT

Thank you Andrew, it helped me resolving my issue.