[Marek Pribyl]

hello,
suddenly I’m facing an exception when deploying webapp to the integrated tomcat in MyEclipse. recently deploying was working perfectly (same webapp), and I really have no idea what I did wrong… My current installation: Eclipse 3.4.2 classic, MyEclipse 7.1.1
I’ve installed paralelly MyEclipse 7.5 for testing (use different workspace)

thanks in advance for any help

java.lang.NoClassDefFoundError: HttpSessionListener
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1817)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3770)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4334)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1105)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1203)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:619)

[Loyal Water]

marekpribyl,
You should setup MyEclipse 7.5 with Eclipse 3.4.2 and test this. Im not sure how it worked earlier because MyEclipse 7.1 is compatible with Eclipse 3.4.1 and not Eclipse 3.4.2.

[Marek Pribyl]

presumably some project settings changed automagically after importing project from one workspace to another. I set back proper build paths and also replaced in .classpath:
<classpathentry kind=”con” path=”org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5″/>
with
<classpathentry kind=”con” path=”org.eclipse.jdt.launching.JRE_CONTAINER”/>

I also uninstalled 7.5, and I’m back on 7.1 with eclipse 3.4.2 now which works for me.

So problem solved, but I really don’t know which changes helped me;-)

[support-joy]

Good to hear you are all set.

[Author]

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