JSON JAX-RS channel: Failed to find resource /HtmlDefaultRepresentation/defaultHtmlEntry.jsp

Question

I have JAX-RS JSON channel:

@Path("/data")
public class DataChannel {

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getGridData(@HeaderParam("Range") String rangeHeader) {

The problem is that (usually) on first call I got the exception from Wink's HtmlProvider, while the subsequent calls are processed correclty and the JSON is returned:

0000006f servlet E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: An exception was thrown by one of the service methods of the servlet [de.datev.qmrzsv.rest.ApplicationConfig] in application [qmslmsv_ear]. Exception created : [javax.ws.rs.WebApplicationException: com.ibm.ws.jsp.webcontainerext.JSPErrorReport: JSPG0036E: Failed to find resource /HtmlDefaultRepresentation/defaultHtmlEntry.jsp at org.apache.wink.server.internal.providers.entity.html.HtmlProvider.include(HtmlProvider.java:78) at org.apache.wink.server.internal.providers.entity.html.HtmlProvider.writeTo(HtmlProvider.java:112) at org.apache.wink.server.internal.providers.entity.html.HtmlProvider.writeTo(HtmlProvider.java:46) at org.apache.wink.server.internal.providers.entity.html.HtmlSyndEntryProvider.writeTo(HtmlSyndEntryProvider.java:81) at org.apache.wink.server.internal.providers.entity.html.HtmlSyndEntryProvider.writeTo(HtmlSyndEntryProvider.java:38) at org.apache.wink.common.internal.providers.entity.FormatedExceptionProvider.writeTo(FormatedExceptionProvider.java:108) at org.apache.wink.common.internal.providers.entity.FormatedExceptionProvider.writeTo(FormatedExceptionProvider.java:48) at org.apache.wink.server.internal.handlers.FlushResultHandler.handleResponse(FlushResultHandler.java:199) at org.apache.wink.server.handlers.AbstractHandler.handleResponse(AbstractHandler.java:38) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.handlers.AbstractHandler.handleResponse(AbstractHandler.java:39) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.handlers.AbstractHandler.handleResponse(AbstractHandler.java:39) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.handlers.AbstractHandler.handleResponse(AbstractHandler.java:39) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.internal.log.Responses.handleResponse(Responses.java:90) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.handlers.AbstractHandler.handleResponse(AbstractHandler.java:39) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:26) at org.apache.wink.server.handlers.ResponseHandlersChain.handle(ResponseHandlersChain.java:22) at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:75) at org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:60) at org.apache.wink.server.internal.RequestProcessor.handleRequestWithoutFaultBarrier(RequestProcessor.java:232) at org.apache.wink.server.internal.RequestProcessor.handleRequest(RequestProcessor.java:154) at org.apache.wink.server.internal.servlet.RestServlet.service(RestServlet.java:124) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1225) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:775) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:457) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1032) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3761) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:975) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:195) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:459) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:526) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:312) at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:87) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1815) Caused by: com.ibm.ws.jsp.webcontainerext.JSPErrorReport: JSPG0036E: Failed to find resource /HtmlDefaultRepresentation/defaultHtmlEntry.jsp at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionProcessor.findWrapper(AbstractJSPExtensionProcessor.java:447) at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionProcessor.getServletWrapper(AbstractJSPExtensionProcessor.java:338) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:965) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:1384) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:548) at org.apache.wink.server.internal.providers.entity.html.HtmlProvider.include(HtmlProvider.java:75) ... 58 more Caused by: java.io.FileNotFoundException: JSPG0036E: Failed to find resource /HtmlDefaultRepresentation/defaultHtmlEntry.jsp ... 64 more

The runtime environment is WebSphere server 8.5.

It looks as on the first time the wrong provider is chosen, the header explicitely states that JSON should be used as response. The HTTP headers sent from client side also implicite state that JSON is expected:

Accept text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8 Accept-Encoding gzip, deflate Accept-Language en,de;q=0.5 Content-Type application/json

What is causing that problem and how to avoid it?

Answer 1

Check the log for previous errors.

When the exception is thrown while generating response, the alternative provider (in that case - HtmlProvider) is used.

Exception can be caused by configuration problem or missing dependency.