Custom Camunda 8 Connector with BPMN Error Code - Paranamer Version

Camunda 8 Topics
,
1

Be aware of Spring Boot Custom Connectors trowing a ConnectorException with your error code.

Scala is throwing an NoSuchMethodException that wont be visible if com.thoughtworks.paranamer:paranamer 2.8.1 is on the classpath (org.springframework.boot:spring-boot-starter-test will provide this version).

This will leed to no awnser submitted to the engine and no visible error in your connector :frowning:

How to Reproduce:
Camunda stack via Docker. Version should not matter, I used the 8.7.0 Stack
Spring Boot application 3.4.4 (other Version effected)

Connector Excample:

@OutboundConnector(
    name = "test.connector1",
    inputVariables = {
        "operation",
        "content",
    },
    type = "test:connector1:1"
)
@Component
public class TestConnector extends OutboundConnectorFunction {

    @Autowired
    private MyService myService;

    @Override
    Object execute(OutboundConnectorContext context) throws Exception {
        throw new ConnectorException("my_bpmn_error_code", "message");
    }
}

Solution:
Enforce Paranamer Version:

        <dependency>
            <groupId>com.thoughtworks.paranamer</groupId>
            <artifactId>paranamer</artifactId>
            <version>2.8</version>
        </dependency>
1 Like