NPE in threadSafeRenderingContext.getFetched in core io marshallers

2015-10-07 14:53:19,189 ERROR [http-bio-0.0.0.0-8080-exec-1] [org.nuxeo.ecm.platform.web.common.exceptionhandling.DefaultNuxeoExceptionHandler] java.lang.NullPointerException
        at org.nuxeo.ecm.core.io.registry.context.ThreadSafeRenderingContext.getFetched(ThreadSafeRenderingContext.java:88)
        at org.nuxeo.ecm.core.io.marshallers.json.document.DocumentModelJsonWriter.mustFetch(DocumentModelJsonWriter.java:126)
        at org.nuxeo.ecm.core.io.marshallers.json.document.DocumentModelJsonWriter.writeEntityBody(DocumentModelJsonWriter.java:147)
        at org.nuxeo.ecm.core.io.marshallers.json.document.DocumentModelJsonWriter.writeEntityBody(DocumentModelJsonWriter.java:105)
        at org.nuxeo.ecm.core.io.marshallers.json.ExtensibleEntityJsonWriter.write(ExtensibleEntityJsonWriter.java:71)
        at org.nuxeo.ecm.core.io.marshallers.json.AbstractJsonWriter.write(AbstractJsonWriter.java:74)
        at org.nuxeo.ecm.webengine.jaxrs.coreiodelegate.PartialCoreIODelegate.writeTo(PartialCoreIODelegate.java:111)
        at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:302)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1510)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)
        at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.containerService(WebEngineServlet.java:171)
        at org.nuxeo.ecm.webengine.app.jersey.WebEngineServlet.service(WebEngineServlet.java:148)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.nuxeo.ecm.webengine.jaxrs.session.SessionCleanupFilter.run(SessionCleanupFilter.java:43)
        at org.nuxeo.ecm.webengine.jaxrs.HttpFilter.doFilter(HttpFilter.java:42)