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Message:

May have duplicate classes being loaded into Tomcat

Posted by Mark Chaves on January 25, 2002 at 12:52 AM

Hi,

Check to see if your Tomcat server is loading up identical
classes from different locations.

E.g. webapps/xyz.war could contain com.bogus.NiceClass and
webapps/abc/WEB-INF/classes/com/bogus will also contain NiceClass.

Cheers,

Mark

> i got following error, how to resolve it.

> java.lang.NullPointerException
> at java.lang.ClassLoader.resolveClass0(Native Method)
> at java.lang.ClassLoader.resolveClass(ClassLoader.java:588)
> at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java:430)
> and so on.