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Posted to user@wink.apache.org by vgunda81 <vg...@gmail.com> on 2013/04/01 23:23:58 UTC
java.lang.NullPointerException when tried to call restful service.
I am getting below exception when trying to access example restful
webservice.*Example service Class:*package
us.oh.state.epa.stars2.services;import javax.ws.rs.Consumes;import
javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.Produces;import
javax.ws.rs.core.MediaType;@Path("/helloworld")public class
HelloWorldResource { @GET @Produces("text/plain") @Consumes("text/plain")
public String getHtml() { return "Hello, World!"; }}*Client
program:*package de.vogella.jersey.first;import
org.apache.wink.client.Resource;import
org.apache.wink.client.RestClient;public class HelloWorldClient { public
static void main (String args[]) { RestClient client = new RestClient();
// create the resource instance to interact with Resource resource =
client.resource("http://localhost:8030/impact-web/rest/helloworld");
resource.contentType("text/plain"); // perform a GET on the resource. The
resource will be returned as plain text String response =
resource.accept("text/plain").get(String.class);
System.out.println("response - " + response.toString()); }
}*Exception:*2013-04-01 17:23:30,756 1082889 [bio-8030-exec-9] DEBUG
rver.internal.RequestProcessor - Processing GET request to
http://localhost:8030/impact-web/rest/helloworld, source content type is
text/plain, acceptable media types include text/plain2013-04-01 17:23:30,756
1082889 [bio-8030-exec-9] DEBUG k.server.internal.log.Requests - Request
URI is http://localhost:8030/impact-web/rest/helloworld2013-04-01
17:23:30,756 1082889 [bio-8030-exec-9] DEBUG k.server.internal.log.Requests
- HTTP Headers are
{accept=[text/plain],connection=[keep-alive],content-type=[text/plain],host=[localhost:8030],user-agent=[Wink
Client v1.1.2]}2013-04-01 17:23:30,757 1082890 [bio-8030-exec-9] DEBUG
nternal.log.ResourceInvocation - Resource invocation:2013-04-01
17:23:30,757 1082890 [bio-8030-exec-9] DEBUG k.server.internal.log.Requests
- The request entity was not read from the
HttpServletRequest.getInputStream().2013-04-01 17:23:30,757 1082890
[bio-8030-exec-9] DEBUG rver.internal.RequestProcessor - The following
error occurred during the invocation of the handlers chain:
NullPointerException with message 'null' while processing GET request sent
to
http://localhost:8030/impact-web/rest/helloworldjava.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:152)
at
org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptableMediaTypes(HttpHeadersImpl.java:106)
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.findMethod(ResourceRegistry.java:359)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:138)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:65)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
at
org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:48)
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:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)2013-04-01 17:23:30,758 1082891
[bio-8030-exec-9] DEBUG rver.internal.RequestProcessor - Registered JAX-RS
resources: Path: helloworld; ClassMetadata: Class:
us.oh.state.epa.stars2.services.HelloWorldResource Path: ; ClassMetadata:
Class:
org.apache.wink.server.internal.resources.HtmlServiceDocumentResource2013-04-01
17:23:30,758 1082891 [bio-8030-exec-9] DEBUG rver.internal.RequestProcessor
- The following user-defined JAX-RS providers are registered: RawType:
interface javax.ws.rs.ext.MessageBodyReaderData Map: {empty}RawType:
interface javax.ws.rs.ext.MessageBodyWriterData Map: {empty}RawType:
interface javax.ws.rs.ext.ContextResolverData Map: {empty}2013-04-01
17:23:30,758 1082891 [bio-8030-exec-9] DEBUG .server.internal.log.Responses
- An error occurred when handling the initial request/response, so wrote the
entity and headers in the error response handlers chain.2013-04-01
17:23:30,758 1082891 [bio-8030-exec-9] DEBUG .server.internal.log.Responses
- There were no custom headers written on the response.2013-04-01
17:23:30,758 1082891 [bio-8030-exec-9] DEBUG .server.internal.log.Responses
- The response entity was not written to the
HttpServletResponse.getOutputStream().2013-04-01 17:23:30,758 1082891
[bio-8030-exec-9] ERROR rver.internal.RequestProcessor - An unhandled
exception occurred which will be propagated to the
container.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:152)
at
org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptableMediaTypes(HttpHeadersImpl.java:106)
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.findMethod(ResourceRegistry.java:359)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:138)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:65)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
at
org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:48)
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:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)Apr 01, 2013 5:23:30 PM
org.apache.catalina.core.StandardWrapperValve invokeSEVERE:
Servlet.service() for servlet [HelloWorldApp] in context with path
[/impact-web] threw exceptionjava.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:152)
at
org.apache.wink.server.internal.contexts.HttpHeadersImpl.getAcceptableMediaTypes(HttpHeadersImpl.java:106)
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.findMethod(ResourceRegistry.java:359)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:138)
at
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:65)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
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:63)
at
org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:48)
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:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
--
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