flowable/flowable-engine · error · FlowableIllegalArgumentException

No resource name provided

Error message

No resource name provided

What it means

getDmnDeploymentResourceData throws FlowableIllegalArgumentException("No resource name provided") when resourceName is null. The resource-data endpoint looks a resource up by its exact name inside a deployment, so the name is a required path variable validated before the deployment query runs.

Solutions

1. Pass the exact resource name (e.g. 'my-decision.dmn') in the URL path.
2. Get valid resource names from GET /dmn-repository/deployments/{deploymentId}/resources before calling.
3. Fix client URL construction to fail fast on null/empty names.

Example fix

// before
byte[] data = client.getDeploymentResourceDataByName(deploymentId, resourceName); // null
// after
String name = Optional.ofNullable(resourceName).filter(n -> !n.isEmpty())
    .orElseGet(() -> listResourceNames(deploymentId).get(0));
byte[] data = client.getDeploymentResourceDataByName(deploymentId, name);

if (resourceName == null || resourceName.isEmpty()) {
    resourceName = getDeploymentResources(deploymentId).get(0).getName();
}

When it happens

Trigger: GET /dmn-repository/deployments/{deploymentId}/resource-data/{resourceName} where the {resourceName} segment is missing or resolves to null/empty in the client-built URL.

Common situations: URL templates with an empty interpolated resource name; path-encoding bugs dropping the last segment; confusing the by-id resource endpoint with the by-name resource-data endpoint and omitting the wrong segment.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

• No deployment id provided
• No resource id provided
• A group or a user is required to create an identity link.
• A group or a user is required to create an identity link.
• A group or a user is required to create an identity link.

AI-assisted analysis of flowable/flowable-engine@d6d39ce1c6 (2026-09-11). Data as JSON: /api/errors/a645366271552cd5. Report an issue: GitHub.

Appendix: source

Thrown at modules/flowable-dmn-rest/src/main/java/org/flowable/dmn/rest/service/api/repository/BaseDmnDeploymentResourceDataResource.java:51

 */
public class BaseDmnDeploymentResourceDataResource {

    @Autowired
    protected ContentTypeResolver contentTypeResolver;

    @Autowired
    protected DmnRepositoryService dmnRepositoryService;
    
    @Autowired(required=false)
    protected DmnRestApiInterceptor restApiInterceptor;

    protected byte[] getDmnDeploymentResourceData(String deploymentId, String resourceName, HttpServletResponse response) {

        if (deploymentId == null) {
            throw new FlowableIllegalArgumentException("No deployment id provided");
        }
        if (resourceName == null) {
            throw new FlowableIllegalArgumentException("No resource name provided");
        }

        // Check if deployment exists
        DmnDeploymentQuery deploymentQuery = dmnRepositoryService.createDeploymentQuery().deploymentId(deploymentId);
        
        DmnDeployment deployment = deploymentQuery.singleResult();
        if (deployment == null) {
            throw new FlowableObjectNotFoundException("Could not find a DMN deployment with id '" + deploymentId);
        }
        
        if (restApiInterceptor != null) {
            restApiInterceptor.accessDeploymentById(deployment);
        }

        List<String> resourceList = dmnRepositoryService.getDeploymentResourceNames(deploymentId);

        if (resourceList.contains(resourceName)) {
            String contentType = contentTypeResolver.resolveContentType(resourceName);

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