Servlet.service() for servlet action threw exception求解答是什么引起的看了n久

[hpjjy]

10:56:18,578 ERROR [[action]] Servlet.service() for servlet action threw exception
java.lang.LinkageError: loader constraint violation: loader (instance of org/jboss/web/tomcat/service/WebAppClassLoader) previously initiated loading for a different type with name "netscape/ldap/LDAPEntry"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1814)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
at org.jboss.web.tomcat.service.WebAppClassLoader.findClass(WebAppClassLoader.java:139)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
at java.lang.Class.getDeclaredMethod(Class.java:1935)
at java.io.ObjectStreamClass.getPrivateMethod(ObjectStreamClass.java:1382)
at java.io.ObjectStreamClass.access$1700(ObjectStreamClass.java:52)
at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:438)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:413)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:310)
at java.io.ObjectStreamClass.initProxy(ObjectStreamClass.java:507)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1539)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1493)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.rmi.MarshalledObject.get(MarshalledObject.java:142)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:72)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:756)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:673)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at com.hncatv.ldap.struts.action.OssldapAction.<init>(OssldapAction.java:65)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:143)
at org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:292)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:230)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.hncatv.web.zz.struts.utils.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:42)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:619)

[hpjjy]

环境：eclipse+jboss4+oracle 网上查了些资料但还是不知道什么原因，求解答……迷茫了n久……求高手解答

[悲しむ予感]

感觉是你用的JAR包的依赖关系不对。可能是版本用错了。

[悲しむ予感]

java.lang.LinkageError LinkageError 的子类指示一个类在一定程度上依赖于另一个类；但是，在编译前一个类之后，后一个类发生了不相容的改变。 org/jboss/web/tomcat/service/WebAppClassLoader这个类里引用的netscape/ldap/LDAPEntry这个类型不是想要的版本。

[hpjjy]

[quote=引用 2 楼 fccfcc1234 的回复:] 感觉是你用的JAR包的依赖关系不对。可能是版本用错了。 不知道是哪个jar，网上查的也是这样说的，但是是初学者,很晕，不知道从何下手……

[hpjjy]

这两个类是jar包中的？我程序里面没这两个类……

[悲しむ予感]

引用 5 楼 hpj2011 的回复:

这两个类是jar包中的？我程序里面没这两个类……

所以才说是你的JAR包问题啊。这个包没用过不是很清楚怎么找问题，但是LZ可以找下相关配置的地方看看有没有问题。或者JBOSS本身对ldap这个JAR包的版本有没有要求。比如说必须要哪个版本之前的JAR包之类的。就像你用低版本的JDK无法运行高版本的TOMCAT一样。