Class load problem

["Hawkins, Keith (Keith)" <kp...@avaya.com>]

I have a servlet that uses the Sun's jndi classes to access a LDAP
database.

I have a test program that can run my servlet's jndi access methods
without any problem.

When I install and run the servlet under tomcat,  the class loader
throws a ClassNotFoundException
for the com.sun.jndi.ldap.LdapCtxFactory class.
(Stack trace shown below.)

I have the jndi jar files in the WEB-INF/lib directory along with the
jar file for my servlet code.

Why can't tomcat load the same classes that my test program can if the
same jar files are used in both cases?

How can I determine the classpath that is in effect when my servlet is
attempting to load the class?

(I tried using System.getProperty("java.class.path") but the results
didn't even show the jar file containing 
 my servlet classes, so I know this is not showing me the true
classpath)


Here is the stack trace at the time of the error:
------------------------------------------------------------------------
--------------------

javax.naming.NoInitialContextException
Cannot instantiate class: com.sun.jndi.ldap.LdapCtxFactory
javax.naming.NoInitialContextException: Cannot instantiate class:
com.sun.jndi.ldap.LdapCtxFactory.  Root exception is
java.lang.ClassNotFoundException: com.sun.jndi.ldap.LdapCtxFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java, Compiled
Code)
	at java.lang.Exception.<init>(Exception.java, Compiled Code)
	at
java.lang.ClassNotFoundException.<init>(ClassNotFoundException.java,
Compiled Code)
	at java.net.URLClassLoader$1.run(URLClassLoader.java, Compiled
Code)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java,
Compiled Code)
	at java.lang.ClassLoader.loadClass(ClassLoader.java, Compiled
Code)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java,
Compiled Code)
	at java.lang.ClassLoader.loadClass(ClassLoader.java, Compiled
Code)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java,
Compiled Code)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:199)
	at
com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:4
9)
	at
javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:660)
	at
javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:250)
	at javax.naming.InitialContext.init(InitialContext.java:226)
	at javax.naming.InitialContext.<init>(InitialContext.java:202)
	at
javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:8
7)
	at
com.avaya.onemeeting.authentication.LDAPAuthenticator.getUserContext(LDA
PAuthenticator.java:117)
	at
com.avaya.onemeeting.authentication.LDAPAuthenticator.authenticate(LDAPA
uthenticator.java:36)
	at
com.avaya.onemeeting.authentication.AuthServlet.authenticate(AuthServlet
.java:136)
	at
com.avaya.onemeeting.authentication.AuthServlet.authenticate(AuthServlet
.java:118)
	at
com.avaya.onemeeting.authentication.AuthServlet.doGet(AuthServlet.java:7
1)
	at
com.avaya.onemeeting.authentication.AuthServlet.doPost(AuthServlet.java:
102)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
	at org.apache.tomcat.core.Handler.service(Handler.java:286)
	at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
	at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.jav
a:797)
	at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
	at
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnec
tion(Ajp12ConnectionHandler.java:166)
	at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java,
Compiled Code)
	at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java,
Compiled Code)
	at java.lang.Thread.run(Thread.java:479)