在WebSphere 8.5.5.2服务器上调用RESTful Web服务时出错
问题描述：
我已经使用打包在EAR上的Apache Wink在WebSphere 8.5.5.2 ND上部署了RESTful应用程序.应用程序启动时，它会显示"初始化成功"消息:
I have deployed the RESTful application using Apache Wink packaged in EAR on WebSphere 8.5.5.2 ND. When the application starts it gives me the "Initialization successful" message:
[5/14/15 15:56:03:588 CDT] 0000006d RestServlet I org.apache.wink.server.internal.servlet.RestServlet getApplication The system is using the my.domain.mobile.rest.RestfulResourceLoader JAX-RS application class that is named in the javax.ws.rs.Application init-param initialization parameter.
[5/14/15 15:56:03:605 CDT] 0000006d SystemOut O 15:56:03,605 INFO [User=] [RestfulResourceLoader] loading resource classes
[5/14/15 15:56:03:684 CDT] 0000006d ApplicationPr I org.apache.wink.server.internal.application.ApplicationProcessor process The following JAX-RS application has been processed: my.domain.mobile.rest.RestfulResourceLoader
[5/14/15 15:56:03:688 CDT] 0000006d Resources I org.apache.wink.server.internal.log.Resources logResourceInfo The server has registered the JAX-RS resource class my.domain.mobile.resources.RestfulLogin with @Path(login).
[5/14/15 15:56:03:690 CDT] 0000006d Providers I org.apache.wink.server.internal.log.Providers log The class my.domain.mobile.RestExceptionHandler was registered as a JAX-RS ExceptionMapper provider for java.lang.Exception Java types.
[5/14/15 15:56:03:974 CDT] 0000006d ServletWrappe I com.ibm.ws.webcontainer.servlet.ServletWrapper init SRVE0242I: [MyApplication] [/context_root] [JAX-RS Servlet]: Initialization successful.
但是一旦我点击URL，服务器就会给我以下错误:
But as soon as I hit the URL, server gives me below error:
[5/14/15 15:59:55:006 CDT] 000000b5 SystemOut O 15:59:55,006 INFO [User=] [RequestInterceptor] Initializing Request Hanlder
[5/14/15 15:59:55:010 CDT] 000000b5 SystemOut O 15:59:55,010 INFO [User=] [ResponseInterceptor] Initializing response interceptor
[5/14/15 15:59:55:068 CDT] 000000b5 SystemOut O 15:59:55,068 INFO [User=] [RequestInterceptor] URI path "/login" invoked on [my.domain.mobile.resources.RestfulLogin@978a19b]
[5/14/15 15:59:55:070 CDT] 000000b5 RequestProces I org.apache.wink.server.internal.RequestProcessor logException The following error occurred during the invocation of the handlers chain: NoClassDefFoundError with message org.apache.wink.server.internal.handlers.SearchResult while processing POST request sent to http://my.domain.name:81/context_root/rest/login
[5/14/15 15:59:55:071 CDT] 000000b5 RequestProces E org.apache.wink.server.internal.RequestProcessor handleRequest An unhandled exception occurred which will be propagated to the container.
java.lang.NoClassDefFoundError: org.apache.wink.server.internal.handlers.SearchResult
at my.domain.mobile.handler.RequestInterceptor.handleRequest(RequestInterceptor.java:48)
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:75)
at org.apache.wink.server.internal.handlers.CreateInvocationParametersHandler.handleRequest(CreateInvocationParametersHandler.java:54)
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:75)
at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:151)
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:75)
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:75)
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:75)
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:75)
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:75)
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:75)
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:75)
at org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:60)
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:1230)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:779)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
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:79)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:960)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1064)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3837)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:981)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)
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.HttpInboundLink.ready(HttpInboundLink.java:283)
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:175)
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:1864)
Caused by: java.lang.ClassNotFoundException: org.apache.wink.server.internal.handlers.SearchResult
at java.net.URLClassLoader.findClass(URLClassLoader.java:600)
at com.ibm.ws.bootstrap.ExtClassLoader.findClass(ExtClassLoader.java:214)
at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:772)
at java.lang.ClassLoader.loadClass(ClassLoader.java:749)
at com.ibm.ws.bootstrap.ExtClassLoader.loadClass(ExtClassLoader.java:120)
at java.lang.ClassLoader.loadClass(ClassLoader.java:726)
at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:62)
at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:58)
at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:584)
at java.lang.ClassLoader.loadClass(ClassLoader.java:726)
at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:584)
at java.lang.ClassLoader.loadClass(ClassLoader.java:726)
... 69 more
之前，我在WebSphere 7上部署了相同的应用程序，并且运行良好.我知道WebSphere 8.5随Wink Jars一起提供，所以我从EAR中删除了这些jars，然后将其部署在服务器上.另外，我在服务器上启用了详细类加载，并发现在服务器启动时该类正在加载.但是，当我从控制台签入Class Loader Viewer时，找不到该类.将罐子添加到共享库"对我也不起作用.如果有人可以指出正确的方向来解决此错误，那将是非常有帮助的.
Earlier I was deploying the same application on WebSphere 7 and it was working fine. I know that WebSphere 8.5 comes with Wink Jars so I removed those jars from EAR and then deployed it on the server. Also, I enabled verbose class loading on my server and found that class is loading when the server starts. Though, when I checked in Class Loader Viewer from console I couldn't found the class. Adding the jars to Shared Library also did not work for me. It would be great help if someone can point me to right direction to solve this error.
修改
以下语句在处理程序中给出了错误:
Following statement is giving error inside the handler:
SearchResult result = context.getAttribute(org.apache.wink.server.internal.handlers.SearchResult.class);
答
WAS 8.5带有内置的Apache Wink 1.1.您可以按照以下步骤在WAS 8.5上迁移应用程序:
WAS 8.5 comes with inbuilt Apache Wink 1.1. You can follow these steps to migrate your application on WAS 8.5:
1)从应用程序lib文件夹中删除所有apache wink jar.
1) Remove all the apache wink jar from your application lib folder.
2)要构建您的应用程序，可以使用以下两个Websphere jar:com.ibm.ws.prereq.jaxrs.jar和com.ibm.ws.prereq.jackson.jar.您可以在WAS_HOME/plugins文件夹中找到这些jar.
2) For building your application you can use these two websphere jar, com.ibm.ws.prereq.jaxrs.jar and com.ibm.ws.prereq.jackson.jar. you can find these jars in WAS_HOME/plugins folder.
3)使用这些jar来构建应用程序，但不要将这些jar打包到应用程序EAR或WAR中.
3) Build your application with these jars but do not package these jars into your application EAR or WAR.
4)如果您的应用程序类型为EAR，请确保所有宁静的资源和扩展Application类的类都属于战争.
4) If your application type is EAR then Make sure all the restful resources and the class which extends Application class are part of war.
5)重新部署您的应用程序，它现在应该可以正常工作.
5) Redeploy your application, it should work fine now.