Hi everyone,
I am trying to create a ClassLoader for my application so then I will not have
to reload all the hibernate and struts when a new class is compiled.
Then my problems started:
I do not know where to put my special ClassLoader.
I got lots of classcast exceptions until I found that a instance of
org.apache.catalina.loader.WebappClassLoader.
So far so good, just extended my class and apache can't find
org.apache.catalina.loader.WebappClassLoader.
Now I have a java.lang.ClassNotFoundException:
org.apache.catalina.loader.WebappClassLoader
I think the error is just because I put my classloader in the wrong place
(which is CATALINA_HOME/common/classes) but i could not avoid this common
folder... Before this one, I tried webapps/MYAPP/WEB-INF/classes but java didnt
found my class.
My guess is something about the ClassLoader hierarchy and visibility of the
classes...
Well... here goes some info:
I am runing catalina on a linux workstation, ubuntu.
my app's context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Loader loaderClass="DeployerClassLoader" delegate="false"
reloadable="false"/>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
</Context>
the tomcat output:
11/01/2006 10:56:33 org.apache.catalina.loader.WebappLoader start
SEVERE: LifecycleException
java.lang.NoClassDefFoundError: org/apache/catalina/loader/WebappClassLoader
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at
org.apache.catalina.loader.WebappLoader.createClassLoader(WebappLoader.java:769)
at org.apache.catalina.loader.WebappLoader.start(WebappLoader.java:638)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4076)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
at
org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:910)
at
org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:873)
at
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1118)
at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1020)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at
org.apache.catalina.core.StandardService.start(StandardService.java:450)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
11/01/2006 10:56:33 org.apache.catalina.core.ContainerBase addChildInternal
SEVERE: ContainerBase.addChild: start:
LifecycleException: start: : java.lang.NoClassDefFoundError:
org/apache/catalina/loader/WebappClassLoader
at org.apache.catalina.loader.WebappLoader.start(WebappLoader.java:675)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4076)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
at
org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:910)
at
org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:873)
at
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1118)
at
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
at
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1020)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at
org.apache.catalina.core.StandardService.start(StandardService.java:450)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
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