Description
In the default configuration org.apache.pluto.container.supportedContainerRuntimeOptions is set to "test,escapeXML,value,javax.portlet.servletDefaultSessionScope" in pluto-configuration.properties
Of those four values only "javax.portlet.servletDefaultSessionScope" is an actual container runtime property. Pluto actually supports javax.portlet.servletDefaultSessionScope and javax.portlet.escapeXml so the file should read:
org.apache.pluto.container.supportedContainerRuntimeOptions=javax.portlet.escapeXml,javax.portlet.servletDefaultSessionScope