@Override
  public void creatingPool() {
    if (typeRegistryInUse) {
      throw new PdxInitializationException(
          "The PDX metadata has already been created as a peer metadata region. Please create your pools first");
    }
  }
For bug #43690 we cannot use shared sockets when doing pdx type registration
geode-core/src/main/java/org/apache/geode/pdx/internal/PeerTypeRegistration.java