尽管存在JAR，但找不到类异常

Question

I am deploying a web application to weblogic with a bunch of JAR files in web-inf\\lib. When I invoke a number of methods from classes in these jar files in my servlet - things work fine . However I have a RMI client jar also - and when I invoke one of its methods - it gives me ClassNotFoundException :

Caused By: java.lang.ClassNotFoundException: com.xyz.RMIClientImpl 
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:393)
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:185)
    at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:637)
    at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:219)
    at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:152)

I dont quite understand classloading in application server but from stacktrace it is clearly seen that some rmi classloader is trying to load the class and not finding it - though it is very much present in my web-inf/lib

NOTE1 : If I try and load the class myself using Class.forName("com.xyz.RMIClientImpl") it works fine .

So something related to classloading and RMI - if someone can explain what is happening would be great .

NOTE2 : If I try a stand alone client ( not a web application ) and invoke the RMI Client things work fine - so the issue is only when deployed to an app server ( weblogic )

NOTE3 : I copied all my jars from my application's lib folder and placed them in weblogic's library and then I did not get this exception. Yes I am aware that this is not the right way to solve the issue but then please do point me in the right direction :)

NOTE4 : setting up the following also did not help:

<wls:container-descriptor><wls:prefer-web-inf-classes>true</wls:prefer-web-inf-classes></wls:container-descriptor>

Answer 1

Try this ! You need to add the jar to the classpath explicitly. right click on project name -> Project properties -> Library and Classpath -> Add jar/directory