Jersey 2调用WebService时RESTEASY003940错误求助

使用JDK 1.8u341/WildFly 10开发Java Web应用，通过Jersey 2调用WebService时出错，异常触发在Client client = ClientBuilder.newClient();语句处。

依赖配置（pom.xml） #

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-web-api</artifactId>
    <version>7.0</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet</artifactId>
    <version>2.19</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-server</artifactId>
    <version>2.19</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-client</artifactId>
    <version>2.19</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.jaxrs</groupId>
    <artifactId>jackson-jaxrs-json-provider</artifactId>
    <version>2.4.1</version>
</dependency>

相关代码 #

MyService.java #

@Path("/")
public class MyService {
    
    private Client client;
    
    public MyService() {
        client = Client.getInstance(CONFIG.getProperty("url"));
    }       
    
    @POST
    @Path("/sendInfo")
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public void sendInfo(NotificationRequest notiRequest){
      String firstName = notiRequest.getFirstName();
      String lastName = notiRequest.getLastName();
      client.notify(firstName, firstName);
    }
}

Client.java #

public class Client {
    
    private String url;
    private static Client instance;
    
    public static Client getInstance(String url) {
        if(instance == null){
            instance = new Client(url);
        }
        return instance;
    }   
    
    private Client(String url) {
        this.url = url;
    }
    
    public NotifyResponse notify(String firstName, String lastName) {
        NotifyResponse notiRes = new NotifyResponse();
        Client client = ClientBuilder.newClient();  // 此处抛出异常
        
        WebTarget webTarget = client.target(this.url + "?firstName="+firstName+"&lastName="+lastName);
        Response response = webTarget.request().get();
        
        if(response.getStatus()!=200 && response.getStatus()!=400){
            notiRes.setResult(0);
            LOG.info("HTTP connection failed " + response.getStatus());
            response.close();
            return notiRes;
        }        

        Map rptaMap = (new Genson()).deserialize(response.readEntity(String.class), Map.class);

        if(rptaMap == null){
            notiRes.setResult(0);
            LOG.info("NotifyResponse es nulo");
            response.close();
            return notiRes;
        }
        
        notiRes.setResult((Boolean)rptaMap.get("result") ? 1:0);
        response.close();
        return notiRes;
    }
    
}       

异常日志 #

[WARN ] 21-11-2022 12:07:18 com.example.MyService.sendInfo(MyService.java:388) - java.lang.RuntimeException: RESTEASY003940: Unable to instantiate MessageBodyReader
java.lang.RuntimeException: java.lang.RuntimeException: RESTEASY003940: Unable to instantiate MessageBodyReader
        at org.jboss.resteasy.plugins.providers.RegisterBuiltin.register(RegisterBuiltin.java:35)
        at org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder.getProviderFactory(ResteasyClientBuilder.java:340)
        at org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder.build(ResteasyClientBuilder.java:348)
        at org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder.build(ResteasyClientBuilder.java:53)
        at javax.ws.rs.client.ClientBuilder.newClient(ClientBuilder.java:114)
        at com.example.client.notify(Client.java:302)
        at com.example.MyService.sendInfo(MyService.java:370)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)

Caused by: java.lang.RuntimeException: RESTEASY003940: Unable to instantiate MessageBodyReader
        at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProvider(ResteasyProviderFactory.java:1437)
        at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProvider(ResteasyProviderFactory.java:1368)
        at org.jboss.resteasy.plugins.providers.RegisterBuiltin.registerProviders(RegisterBuiltin.java:71)
        at org.jboss.resteasy.plugins.providers.RegisterBuiltin.register(RegisterBuiltin.java:31)
        ... 68 more
Caused by: java.lang.RuntimeException: RESTEASY003325: Failed to construct public com.owlike.genson.ext.jaxrs.GensonJsonConverter(javax.ws.rs.ext.Providers)
        at org.jboss.resteasy.core.ConstructorInjectorImpl.construct(ConstructorInjectorImpl.java:162)
        at org.jboss.resteasy.spi.ResteasyProviderFactory.createProviderInstance(ResteasyProviderFactory.java:2246)
        at org.jboss.resteasy.spi.ResteasyProviderFactory.addMessageBodyReader(ResteasyProviderFactory.java:806)
        at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProvider(ResteasyProviderFactory.java:1432)
        ... 71 more
Caused by: org.jboss.resteasy.spi.LoggableFailure: RESTEASY003880: Unable to find contextual data of type: javax.ws.rs.ext.Providers
        at org.jboss.resteasy.core.ContextParameterInjector$GenericDelegatingProxy.invoke(ContextParameterInjector.java:62)
        at com.sun.proxy.$Proxy200.getContextResolver(Unknown Source)
        at com.owlike.genson.ext.jaxrs.GensonJsonConverter.<init>(GensonJsonConverter.java:38)
        ... 

问题核心是WildFly 10自带的Resteasy（JAX-RS实现）与引入的Jersey 2冲突，同时Genson JSON转换器的初始化依赖上下文环境异常，可通过以下步骤解决：

1. 排除WildFly自带的Resteasy模块
   在WEB-INF目录下创建jboss-deployment-structure.xml，配置排除服务器自带的JAX-RS相关模块，避免与Jersey冲突：

   <jboss-deployment-structure>
       <deployment>
           <exclude-subsystems>
               <subsystem name="jaxrs"/>
           </exclude-subsystems>
           <exclusions>
               <module name="javaee.api"/>
               <module name="javax.ws.rs.api"/>
               <module name="org.jboss.resteasy.resteasy-jaxrs"/>
               <module name="org.jboss.resteasy.resteasy-cdi"/>
               <module name="org.jboss.resteasy.resteasy-jackson2-provider"/>
               <module name="org.jboss.resteasy.resteasy-genson"/>
           </exclusions>
       </deployment>
   </jboss-deployment-structure>
   

2. 明确使用Jersey的ClientBuilder
   替换默认的ClientBuilder.newClient()，直接使用Jersey的实现类，避免加载Resteasy的客户端实现：

   // 替换原有的Client创建代码
   org.glassfish.jersey.client.JerseyClientBuilder clientBuilder = new org.glassfish.jersey.client.JerseyClientBuilder();
   Client client = clientBuilder.build();
   

3. 统一使用Jackson处理JSON
   日志显示Genson是Resteasy自带的转换器，而项目已引入Jackson的JSON provider，可排除Genson的间接依赖，并手动注册Jackson提供者：

   • 在pom.xml中排除Genson（若有间接依赖）：

     <dependency>
         <!-- 替换为实际依赖 -->
         <groupId>xxx</groupId>
         <artifactId>xxx</artifactId>
         <exclusions>
             <exclusion>
                 <groupId>com.owlike</groupId>
                 <artifactId>genson</artifactId>
             </exclusion>
         </exclusions>
     </dependency>
     

   • 初始化客户端时注册Jackson提供者：

     Client client = JerseyClientBuilder.createClient();
     client.register(JacksonJsonProvider.class);
     

内容的提问来源于stack exchange，提问作者user3637971