If you are seeing the following exception when running Jetspeed on IBM
WebSphere Application Server:
[Fri Nov 17 02:34:41 EST 2000] -- ERROR -- Could not initialize the
RegistryManager:
Exception: java.lang.NullPointerException
Stack Trace follows:
java.lang.NullPointerException
at
org.apache.jetspeed.cache.disk.DiskCacheUtils.getLocalURL(DiskCacheUtils.java:151)
at
org.apache.jetspeed.cache.disk.JetspeedDiskCache.getEntry(JetspeedDiskCache.java:217)
at
org.apache.jetspeed.cache.disk.JetspeedDiskCache.getEntry(JetspeedDiskCache.java:183)
at
org.apache.jetspeed.registry.RegistryManager.init(RegistryManager.java:200)
at org.apache.jetspeed.JetspeedServlet.init(JetspeedServlet.java:182)
at
com.ibm.servlet.engine.webapp.StrictServletInstance.doInit(ServletManager.java:558)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.
_init(StrictLifecycleServlet.java:136)
at
com.ibm.servlet.engine.webapp.PreInitializedServletState.init(StrictLifecycleServlet.java:244)
at
com.ibm.servlet.engine.webapp.StrictLifecycleServlet.init(StrictLifecycleServlet.java:102)
at
com.ibm.servlet.engine.webapp.ServletInstance.init(ServletManager.java:277)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at
com.ibm.servlet.engine.webapp.ServletManager.addServlet(ServletManager.java:71)
at
com.ibm.servlet.engine.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java:88)
at
com.ibm.servlet.engine.webapp.WebAppServletManager.getServletReference(WebAppServletManager.java:132)
at
com.ibm.servlet.engine.webapp.WebApp.getServletReference(WebApp.java:281)
at
com.ibm.servlet.engine.webapp.WebAppRequestDispatcherInfo.calculateInfo(WebAppRequestDispatcherInfo.java:139)
at
com.ibm.servlet.engine.webapp.WebAppRequestDispatcherInfo.<init>(WebAppRequestDispatcherInfo.java:43)
at
com.ibm.servlet.engine.webapp.WebApp.getRequestDispatcher(WebApp.java:932)
at
com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:73)
at
com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)
at
com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:155)
at
com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:300)
at
com.ibm.servlet.engine.oselistener.SQEventListenerImp$ServiceRunnable.run(SQEventListenerImp.java:230)
at
com.ibm.servlet.engine.oselistener.SQEventListenerImp.notifySQEvent(SQEventListenerImp.java:104)
at
com.ibm.servlet.engine.oselistener.serverqueue.SQEventSource.notifyEvent(SQEventSource.java:212)
at
com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.notifyService(SQWrapperEventSource.java:347)
at
com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.run(SQWrapperEventSource.java:216)
at
com.ibm.servlet.engine.oselistener.outofproc.OutOfProcThread$CtlRunnable.run(OutOfProcThread.java:248)
at java.lang.Thread.run(Thread.java:481)
Here is a fix for you. The problem is a bug in IBM WebSphere Application
Server. To fix the problem, you will need this servlet:
----- snip ----
package com.ibm.pvc.fixes;
/**
* This class is designed to fix a bug in WebSphere Application Server
version 3.0 and 3.5.
* Without this fix, calls to ServletContext.getResource() fail with a
MalformedURLException.
* This failure is because the com.ibm.servlet.classloader.Handler is not
registered with the
* system as a handler for the classloader:// protocol. The registration
for this class is
* contained in a static initializer in the class and therefore simply
loading the class into
* the VM will register it in the system property
java.protocol.handler.pkgs.
*
*/
public class WasClassLoaderHandlerFix extends
javax.servlet.http.HttpServlet {
static {
try {
Class.forName("com.ibm.servlet.classloader.Handler");
System.out.println("WasClassLoaderHandlerFix was successful.");
}
catch (Throwable throwable) {
System.out.println("WasClassLoaderHandlerFix failed.");
throwable.printStackTrace();
}
}
}
----- snip ----
Compile this code and put it in the classpath. Then create a servlet in
the Administration GUI. It is really important that you set "Load at
startup" to TRUE on the Advanced tab.
______________________________________________________
Michael D. Harris - IBM Pervasive Computing - RTP, NC
E-Mail: [EMAIL PROTECTED] - IBM VNet: HARRISMD@IBMUSM27
Lotus Notes: Michael D Harris/Raleigh/IBM@IBMUS
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