I'm trying to run Tomcat 4.0.4 and get HTTP 503 errors
for all servlets including the examples. I only have
one instance of the servlet.jar file in my classpath,
and it's the one that came with the 4.0.4
distribution. I get the following exception --
javax.servlet.ServletException: Error instantiating
servlet class org.apache.jasper.servlet.JspServlet
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:895)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:810)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3279)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:3421)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785)
at
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478)
at
org.apache.catalina.core.StandardHost.install(StandardHost.java:738)
at
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300)
at
org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:232)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:155)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
at
org.apache.catalina.core.StandardService.start(StandardService.java:388)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
at
org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at
org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at
org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at
org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
----- Root Cause -----
java.lang.IncompatibleClassChangeError: Implementing
class
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at
java.security.SecureClassLoader.defineClass(Unknown
Source)
at java.net.URLClassLoader.defineClass(Unknown
Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native
Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at
org.apache.catalina.loader.StandardClassLoader.findClass(StandardClassLoader.java:674)
at
org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:1093)
at
org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:992)
at java.lang.ClassLoader.loadClassInternal(Unknown
Source)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Unknown Source)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:886)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:810)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3279)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:3421)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785)
at
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:478)
at
org.apache.catalina.core.StandardHost.install(StandardHost.java:738)
at
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300)
at
org.apache.catalina.startup.HostConfig.start(HostConfig.java:389)
at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:232)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:155)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131)
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343)
at
org.apache.catalina.core.StandardService.start(StandardService.java:388)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
at
org.apache.catalina.startup.Catalina.start(Catalina.java:781)
at
org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
at
org.apache.catalina.startup.Catalina.process(Catalina.java:179)
at java.lang.reflect.Method.invoke(Native Method)
at
org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)
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