java.lang.LinkageError：加载程序约束冲突：解析接口方法时

Question

查找 ejb 并调用它的方法后出现异常。我正在将 jboss4.2.3 升级到 wildfly

查看堆栈跟踪：---

ERROR [org.apache.struts.actions.DispatchAction] (default task-41) Dispatch[/submitActivityForm] to method 'showDetails' returned an exception: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_65]
    at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_65]
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:274) [struts-1.0.jar:1.2.7]
    at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194) [struts-1.0.jar:1.2.7]
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) [struts-1.0.jar:1.2.7]
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) [struts-1.0.jar:1.2.7]
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) [struts-1.0.jar:1.2.7]
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) [struts-1.0.jar:1.2.7]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at com.tzaconsulting.ptw.filter.SecurityFilter.doFilter(SecurityFilter.java:75) [ptw-common-1.jar:]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_65]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_65]

原因：java.lang.LinkageError：加载程序约束违规：解析接口方法时“com.tzaconsulting.ptw.maintenance.ejb.activity.ActivityBusiness.showDetails(Ljava/lang/String;)Lcom/tzaconsulting/ptw/维护/普通/po/活动；"当前类 com/tzaconsulting/ptw/maintenance/web/delegate/ActivityDelegate 的类加载器（org/jboss/modules/ModuleClassLoader 的实例）和用于解析的类加载器（org/jboss/modules/ModuleClassLoader 的实例）类，com/tzaconsulting/ptw/maintenance/ejb/activity/ActivityBusiness，对于类型 ctivityBusiness.showDetails(Ljava/lang/String;)Lcom/tzaconsulting/ptw/maintenance/common/po/Activity 有不同的 Class 对象；在签名中使用 在 com.tzaconsulting.ptw.maintenance.web.delegate.ActivityDelegate.getCurrentActivity(ActivityDelegate.java:240) [类：] 在 com.tzaconsulting.ptw.maintenance.web.action.ActivityDispatchAction.showDetails(ActivityDispatchAction.java:626) [类：] ... 43 更多

Answer 1

我还进行了从 4.2.2 到 wild 的迁移，并且容器的行为有所不同。

在 4 中，您拥有统一的类加载，这意味着所有内容都只有一个类加载器。听起来你可以从任何地方加载每个类。 Wildly 为每个应用程序提供不同的类加载器，因此您会遇到链接错误。

解决方案是设置不同应用程序之间的依赖关系，你应该没问题。

顺便说一句：根据您的项目布局，它可能会导致更大的重构。