Topic
13 replies Latest Post - ‏2013-09-10T22:22:20Z by RafaelMonomanTeixeira
SystemAdmin
SystemAdmin
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Pinned topic RESTful Web Service Stateless Session Bean throws NullPointerException

‏2013-02-14T03:49:48Z |
I have created a RESTful web services against my local WAS 8.0.0.5 development environment. After exporting the EAR file and deploying to our production server, invoking the web services via the appropriate URL causes a NullPointerException and causes an error 500 from the app server. This error occurs before any web service code is executed. I then created another web service that just returned a string and got the same result.
Updated on 2013-02-15T16:02:51Z at 2013-02-15T16:02:51Z by bpaskin
  • bpaskin
    bpaskin
    2637 Posts
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    Re: RESTful Web Service Stateless Session Bean throws NullPointerException

    ‏2013-02-14T12:06:53Z  in response to SystemAdmin
    Hi, You are being a little vague. Can you list you code that is causing the issue?

    Regards,
    Brian
    • SystemAdmin
      SystemAdmin
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      Re: RESTful Web Service Stateless Session Bean throws NullPointerException

      ‏2013-02-14T15:30:43Z  in response to bpaskin
      import java.sql.Connection;
      import java.sql.ResultSet;
      import java.sql.Statement;
      import java.util.ArrayList;
      import java.util.List;

      import javax.ejb.Stateless;
      import javax.naming.Context;
      import javax.naming.InitialContext;
      import javax.naming.NamingException;
      import javax.sql.DataSource;
      import javax.ws.rs.GET;
      import javax.ws.rs.Path;
      import javax.ws.rs.Produces;

      import com.google.gson.Gson;

      /**
      * Session Bean implementation class MobileGateway
      */
      @Stateless
      @Path("/mobilegateway")
      public class MobileGateway {

      private static String DATASOURCE_CONTEXT = "jdbc/mobile";

      /**
      * Default constructor.
      */
      public MobileGateway() {
      // TODO Auto-generated constructor stub
      }

      private DataSource setUpDataSource() throws NamingException {

      try {

      Context initialContext = new InitialContext();
      DataSource ds = (DataSource)initialContext.lookup(DATASOURCE_CONTEXT);
      if(ds == null) {
      initialContext = new javax.naming.InitialContext();
      Context envCtx = (javax.naming.Context) initialContext.lookup("java:comp/env");
      ds = (DataSource) envCtx.lookup(DATASOURCE_CONTEXT);
      }

      return ds;
      }
      catch (Exception e) {
      System.out.println("Error:" + e);
      return null;
      }
      }

      @GET
      @Path("/test")
      @Produces("text/plain")
      public String getTest() {
      return "Returned from the web service!";
      }
      @GET
      @Path("/schedule")
      @Produces("application/json")
      public String getSchedule() {

      String result = "";
      List<Schedule> list = new ArrayList<Schedule>();

      try {
      DataSource ds = setUpDataSource();

      Connection c = ds.getConnection();
      Statement s = c.createStatement();

      ResultSet rs = s.executeQuery("select * from pwlc.schedule");
      while (rs.next()) {
      Schedule sch = new Schedule();
      sch.setEndTime(rs.getDate("schedule_end_time"));
      sch.setGroupId(rs.getInt("schedule_group_id"));
      sch.setId(rs.getInt("schedule_id"));
      sch.setLocation(rs.getString("schedule_location"));
      sch.setStartTime(rs.getDate("schedule_start_time"));
      sch.setSubTitle(rs.getString("schedule_subtitle"));
      sch.setText(rs.getString("schedule_text"));
      sch.setTimeText(rs.getString("schedule_time_text"));
      sch.setTitle(rs.getString("schedule_title"));
      sch.setDay(rs.getString("schedule_day"));

      list.add(sch);
      }

      Gson gson = new Gson();
      result = gson.toJson(list);
      }
      catch (Exception e) {
      result = "{error:" + e.toString() + "}";
      System.out.println("Error:" + e);
      }

      return result;
      }

      }
      • SystemAdmin
        SystemAdmin
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        Re: RESTful Web Service Stateless Session Bean throws NullPointerException

        ‏2013-02-14T15:31:52Z  in response to SystemAdmin
        The simple /test service causes the exact same problem. I have deployed this code without the other method that is using JDBC and still the same result

        This code works on my local WAS 8.0.0.5 dev server.
        • bpaskin
          bpaskin
          2637 Posts
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          Re: RESTful Web Service Stateless Session Bean throws NullPointerException

          ‏2013-02-14T15:58:23Z  in response to SystemAdmin
          Can you paste the stacktrace of the error?

          Brian
          • bpaskin
            bpaskin
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            Re: RESTful Web Service Stateless Session Bean throws NullPointerException

            ‏2013-02-14T16:30:06Z  in response to bpaskin
            A few things. To get it working I had the class extend Application and I added an override in the class for the getClasses() method. It seems to work on my 8.5 instance.

            Brian
            • SystemAdmin
              SystemAdmin
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              Re: RESTful Web Service Stateless Session Bean throws NullPointerException

              ‏2013-02-14T17:14:34Z  in response to bpaskin
              Thanks for the replies. I have a separate class that extends Application and added my class there and then made the correct entry in web.xml. What I don't understand is why this works in my local WAS 8.0.0.5 and not on my server. Very frustrating!

              (Is there a better way to format output)

              2/13/13 22:31:51:717 EST 0000005c servlet E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: An exception was thrown by one of the service methods of the servlet JAX-RS Servlet in application PWLCMobileEAR. Exception created : [java.lang.NullPointerException
              at org.apache.wink.common.internal.http.Accept.valueOf(Accept.java:139)
              at org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptHeader(HttpHeadersImpl.java:151)
              at org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptableMediaTypes(HttpHeadersImpl.java:105)
              at org.apache.wink.server.internal.registry.ResourceRegistry.filterByProduces(ResourceRegistry.java:558)
              at org.apache.wink.server.internal.registry.ResourceRegistry.filterDispatchMethods(ResourceRegistry.java:482)
              at org.apache.wink.server.internal.registry.ResourceRegistry.findSubResourceMethod(ResourceRegistry.java:391)
              at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleSubResourceMethod(FindResourceMethodHandler.java:168)
              at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:110)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.handlers.FindRootResourceHandler.handleRequest(FindRootResourceHandler.java:95)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.handlers.HeadMethodHandler.handleRequest(HeadMethodHandler.java:53)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.handlers.OptionsMethodWADLHandler.handleRequest(OptionsMethodWADLHandler.java:51)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.handlers.SearchResultHandler.handleRequest(SearchResultHandler.java:33)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.log.ResourceInvocation.handleRequest(ResourceInvocation.java:92)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.internal.log.Requests.handleRequest(Requests.java:76)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
              at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
              at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
              at org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:52)
              at org.apache.wink.server.internal.RequestProcessor.handleRequestWithoutFaultBarrier(RequestProcessor.java:207)
              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:1224)
              at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:774)
              at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:456)
              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:3751)
              at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304)
              at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:962)
              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:452)
              at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511)
              at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:305)
              at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:276)
              at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
              at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
              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:1690)
              • bpaskin
                bpaskin
                2637 Posts
                ACCEPTED ANSWER

                Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                ‏2013-02-14T20:16:00Z  in response to SystemAdmin
                Hi, Are you including your own version of Apache Wink in your ear file?

                Brian
                • SystemAdmin
                  SystemAdmin
                  37426 Posts
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                  Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                  ‏2013-02-14T22:11:55Z  in response to bpaskin
                  Nope. This is just as simple as it looks. I created a web app, created an EJB 3 Stateless bean and then added the RESTful annotations.
                  • bpaskin
                    bpaskin
                    2637 Posts
                    ACCEPTED ANSWER

                    Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                    ‏2013-02-15T11:58:45Z  in response to SystemAdmin
                    Hi, Can you try a very simple example? Here is the code that I have working on my system:

                    
                    
                    
                    package com.ibm.test.ejb.session;   
                    
                    import java.util.HashSet; 
                    
                    import java.util.Set; 
                    
                    import javax.ejb.Stateless; 
                    
                    import javax.ws.rs.ApplicationPath; 
                    
                    import javax.ws.rs.GET; 
                    
                    import javax.ws.rs.Path; 
                    
                    import javax.ws.rs.Produces; 
                    
                    import javax.ws.rs.core.Application;   @Stateless @Path(
                    "/mobilegateway") @ApplicationPath(
                    "jaxrs") 
                    
                    public 
                    
                    class TestSession 
                    
                    extends Application 
                    {   @GET @Produces(
                    "text/plain") 
                    
                    public String getTest() 
                    { 
                    
                    return 
                    "GET method received a call"; 
                    } @Override 
                    
                    public Set<Class<?>> getClasses() 
                    { Set<Class<?>> classes = 
                    
                    new HashSet<Class<?>>(); classes.add(TestSession.class); 
                    
                    return classes; 
                    } 
                    }
                    


                    Thanks,
                    Brian
                    • SystemAdmin
                      SystemAdmin
                      37426 Posts
                      ACCEPTED ANSWER

                      Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                      ‏2013-02-15T14:59:44Z  in response to bpaskin
                      Same exact error in log.

                      Thanks again for the help.
                      • bpaskin
                        bpaskin
                        2637 Posts
                        ACCEPTED ANSWER

                        Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                        ‏2013-02-15T16:02:51Z  in response to SystemAdmin
                        Hi, If you are still getting the error, it probably is something in the environment. I tested the example service on AIX 6.1, RH Linux and Windows 7 all running WASv8.0.0.5. What you could do is turn on tracing and see what is happening. I would use this trace string: *=info:com.ibm.ws.webservices.*=all:org.apache.*=all:com.ibm.ws.websvcs.*=all:com.ibm.ws.metadata.*=all.

                        Regards,
                        Brian
                      • Christoph
                        Christoph
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                        Re: RESTful Web Service Stateless Session Bean throws NullPointerException

                        ‏2013-08-27T12:24:31Z  in response to SystemAdmin

                        Hi,

                        I've the exactly same error here.

                        Have you found a solution to this problem?

                        [27.08.13 14:20:34:868 CEST] 0000001b RequestProces E org.apache.wink.server.internal.RequestProcessor handleRequest Nicht behandelte Ausnahme
                                                         java.lang.NullPointerException
                            at org.apache.wink.common.internal.http.Accept.valueOf(Accept.java:139)
                            at org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptHeader(HttpHeadersImpl.java:151)
                            at org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptableMediaTypes(HttpHeadersImpl.java:105)
                            at org.apache.wink.server.internal.registry.ResourceRegistry.selectBestMatchingMethod(ResourceRegistry.java:603)
                            at org.apache.wink.server.internal.registry.ResourceRegistry.findSubResourceMethod(ResourceRegistry.java:394)
                            at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleSubResourceMethod(FindResourceMethodHandler.java:168)
                            at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:110)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.handlers.FindRootResourceHandler.handleRequest(FindRootResourceHandler.java:95)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.handlers.HeadMethodHandler.handleRequest(HeadMethodHandler.java:53)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.handlers.OptionsMethodHandler.handleRequest(OptionsMethodHandler.java:46)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.handlers.SearchResultHandler.handleRequest(SearchResultHandler.java:33)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.log.ResourceInvocation.handleRequest(ResourceInvocation.java:92)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.internal.log.Requests.handleRequest(Requests.java:76)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
                            at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:67)
                            at org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:52)
                            at org.apache.wink.server.internal.RequestProcessor.handleRequestWithoutFaultBarrier(RequestProcessor.java:207)
                            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.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136)
                            at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
                            at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
                            at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter.doFilter(AbstractPreAuthenticatedProcessingFilter.java:88)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
                            at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
                            at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
                            at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
                            at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
                            at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
                            at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
                            at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
                            at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
                            at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
                            at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
                            at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
                            at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
                            at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
                            at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:928)
                            at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1025)
                            at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3763)
                            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:453)
                            at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515)
                            at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:306)
                            at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:277)
                            at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
                            at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
                            at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:166)
                            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:1691)

                        Thanks,

                        Christoph

  • RafaelMonomanTeixeira
    1 Post
    ACCEPTED ANSWER

    Re: RESTful Web Service Stateless Session Bean throws NullPointerException

    ‏2013-09-10T22:22:20Z  in response to SystemAdmin

    I've been experiencing such type of error and after turning up the log details as bpaskin suggested I've found some reference to a resteasy (JBoss JAX-RS implementation) class which came from some dependency for form/multi-part serialization that I tried to use.

    I yanked the dependency and reinstalled the app and still the error was occurring and killing previously working rest services from other apps.

    So as WebSphere is known to cache lots of merged configuration data, it seems it doesn't uninstall correctly the apps, so I went to the console and used stopServer/startServer to restart the instance and magically all begun to work again...

    So the bottom line is beware of mixing code from other lineages of JEE servers and beware of WebSphere cache mishandling...