WARN [ErraiMarshalling] using dynamic marshallers

Question

I'm trying to figure out why this Warning is showing up, as my Errai app loads in GWT Dev mode:

[INFO] WARN [ErraiMarshalling] could not locate marshaller class. [INFO] WARN [ErraiMarshalling] using dynamic marshallers. dynamic marshallers are designed for development mode testing, and ideally should not be used in production. *

I have tried to put:

<extraJvmArgs>-Xmx1500m -XX:MaxPermSize=1000m -XX:-UseSplitVerifier -Derrai.marshalling.server.classOutput=${project.build.outputDirectory}</extraJvmArgs>

and this

<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>

Answer 1

In your ErraiApp.properties, add the following configuration:

errai.marshalling.use_static_marshallers=true

More on https://docs.jboss.org/author/display/ERRAI/ErraiApp.properties

Answer 2

This warning message is showing because MappingContextSingleton.java has method like,

  private static void dynamicMarshallingWarning() {
    log.warn("using dynamic marshallers. dynamic marshallers are designed" +
        " for development mode testing, and ideally should not be used in production. *");
  }

It called from loadDynamicMarshallers method,

public static ServerMappingContext loadDynamicMarshallers() {
    dynamicMarshallingWarning();

As I show this error message in three cases like

Case 1

  if (cls == null) {
      return loadDynamicMarshallers();
    }

Case 2

if (!MarshallingGenUtil.isUseStaticMarshallers()) {
        sContext = loadDynamicMarshallers();
      }

Case 3

catch (Throwable t) {
          log.debug("failed to load static marshallers", t);
          log.warn("static marshallers were not found.");

          sContext = loadDynamicMarshallers();
        }

This is not your question's answer but it might help you.