Appengine java -Jersey/Jackson JaxbAnnotationIntrospector NoClassDefFoundError

Question

정확히 동일한 문제가있어서 읽기 전용 Google 그룹 App Engine for Java에서 답이없는 질문을 다시하고 있습니다. (original)

저는 jersey, jaxb 및 jackson을 사용하여 간단한 json REST 서비스를 작성했습니다. 항상 제외 끝 거의 좋은, 서버에 그러나 첫 요청을 작동합니다 java.lang.NoClassDefFoundError가 : 조직/codehaus/잭슨/XC/JaxbAnnotationIntrospector 어떤 이유로 GAE에 대한

/저지는 초기 요청시이 클래스를 찾을 수 없습니다. 그러나 이후의 모든 요청은 정상적으로 작동하고 클래스는로드 된 것으로 보입니다. 추가 정보에 대한

:

내가 서버에 JSON을 보내고있다 - 크롬의 관리자에서 내가 볼 수 있습니다

Content-Type:application/json;charset=UTF-8 
Request Payload {"stuff":["a","b"],"number":"10"} 

및 관련 자원 서명은 다음과 같습니다

@POST 
    @Consumes({MediaType.APPLICATION_JSON}) 
    public void run(Params params){}; 

도움을 주신 모든 분들께 감사드립니다!

편집 : 여기에 내가 가장 가능성이 optional XC 잭슨 lib 디렉토리가없는 무엇을 말할 수에서 전체 스택 추적

WARNING: Error for /backtest 
java.lang.NoClassDefFoundError: org/codehaus/jackson/xc/JaxbAnnotationIntrospector 
    at org.codehaus.jackson.jaxrs.MapperConfigurator._resolveIntrospector(MapperConfigurator.java:169) 
    at org.codehaus.jackson.jaxrs.MapperConfigurator._resolveIntrospectors(MapperConfigurator.java:144) 
    at org.codehaus.jackson.jaxrs.MapperConfigurator._setAnnotations(MapperConfigurator.java:131) 
    at org.codehaus.jackson.jaxrs.MapperConfigurator.getDefaultMapper(MapperConfigurator.java:70) 
    at org.codehaus.jackson.jaxrs.JacksonJsonProvider.locateMapper(JacksonJsonProvider.java:609) 
    at org.codehaus.jackson.jaxrs.JacksonJsonProvider.readFrom(JacksonJsonProvider.java:404) 
    at com.sun.jersey.json.impl.provider.entity.JacksonProviderProxy.readFrom(JacksonProviderProxy.java:139) 
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:474) 
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123) 
    at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:46) 
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153) 
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$VoidOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:166) 
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) 
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288) 
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) 
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) 
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353) 
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:895) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:843) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:804) 
    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163) 
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58) 
    at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:168) 
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58) 
    at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118) 
    at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:369) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.Server.handle(Server.java:326) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) 
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) 
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) 
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
Caused by: java.lang.ClassNotFoundException: org.codehaus.jackson.xc.JaxbAnnotationIntrospector 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:176) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
    ... 60 more 

Answer 1

입니다.

XC 패키지를 사용하면 클래스 매핑을 위해 Jackson Annotations와 Xml Annotations (JAXB)를 함께 사용할 수 있습니다.

이 오류는 JAXB 지원이 필요하지 않으면이 오류가 단지이 문제를 무시하지 않는 한 한 번만 발생합니다.