In the case where the NucleusAssembler instance returns a null response or the response ContentItem contains an @error key (in other words, the request is not an Assembler request), the AssemblerPipelineServlet component simply passes the request back to the ATG request handling pipeline for further processing. This scenario is shown in the diagram below:
Note that you can configure an application to bypass the AssemblerPipelineServlet and avoid this scenario. For more information, see the AssemblerPipelineServlet section.
