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我在尝试在MyEclipseBlue.Can中的WAS 8.5上部署EAR时出现以下错误，请帮助？ 我已经尝试将父类最后的类装入器顺序更改为第一个，在web.xml中设置metadata-complete =“true”，创建新配置文件并重新安装WAS。似乎没有任何工作。请在下面找到控制台日志。WAS 8.5服务器启动错误
[9/17/16 16:03:06:548 IST] 00000001 ContainerHelp E WSVR0501E: Error creating component [email protected]
com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: Failed to load webapp: loading constraint violation: loader "com/ibm/ws/classloader/[email protected]" previously initiated loading for a different type with name "javax/servlet/ServletContext" defined by loader "org/eclipse/osgi/internal/baseadaptor/[email protected]"
at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:432)
at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:718)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1170)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1370)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:638)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:968)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:769)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2172)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:445)
at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:388)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:116)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$CUInitializer.run(CompositionUnitMgrImpl.java:994)
at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:349)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1783)
Caused by: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: Failed to load webapp: loading constraint violation: loader "com/ibm/ws/classloader/[email protected]" previously initiated loading for a different type with name "javax/servlet/ServletContext" defined by loader "org/eclipse/osgi/internal/baseadaptor/[email protected]"
at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:759)
at com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:634)
at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:426)
... 14 more
Caused by: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: loading constraint violation: loader "com/ibm/ws/classloader/[email protected]" previously initiated loading for a different type with name "javax/servlet/ServletContext" defined by loader "org/eclipse/osgi/internal/baseadaptor/[email protected]"
at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:176)
at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:749)
... 16 more
Caused by: java.lang.LinkageError: loading constraint violation: loader "com/ibm/ws/classloader/[email protected]" previously initiated loading for a different type with name "javax/servlet/ServletContext" defined by loader "org/eclipse/osgi/internal/baseadaptor/[email protected]"
at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:262)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:69)
at com.ibm.ws.classloader.CompoundClassLoader._defineClass(CompoundClassLoader.java:852)
at com.ibm.ws.classloader.CompoundClassLoader.localFindClass(CompoundClassLoader.java:762)
at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:603)
at java.lang.ClassLoader.loadClass(ClassLoader.java:627)
at com.sun.xml.ws.transport.http.servlet.WSServletContainerInitializer.onStartup(WSServletContainerInitializer.java:61)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.initializeServletContainerInitializers(WebAppImpl.java:613)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:409)
at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:88)
at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:169)
... 17 more
你大概已经在应用程序中打包了servlet API，所以你应该删除它。 FWIW，除非你的应用程序或模块类加载器被设置为“父亲最后”，否则基本上不可能得到这样的LinkageError。如果你确实从父母最后变成了父母，但仍然看到一些错误，我怀疑它与你在这里包含的错误不一样。 –
感谢@Brett删除servlet-api jar解决了这个问题，但在服务器启动期间，我仍然收到类似于java.lang.NoClassDefFoundError：org.slf4j.LoggerFactory（初始化失败）的错误。服务器现在开始运行，但应用程序不是。 – Twisha
整个stacktrace可以在这里找到：http://stackoverflow.com/questions/39571158/was-8-5-server-start-up-error-noclassdeffounderror – Twisha