RE: out of ideas on an error
We had the problem also, I'm just giving some ideas, because at that time I didn't have the time to "cleanly" solve the problem.. These are things that were at that moment going on : - Having java files in the classes directory which are not the same. - Some compiled classes are not compiled in classic mode. - Make a "compiled" export with visual age and also export the java files (see the first one). Our solution : delete all the classes and compile it again... Mvgr, Martin -Original Message-From: Kevin Fonner [mailto:[EMAIL PROTECTED]]Sent: Tuesday, May 29, 2001 4:03 AMTo: [EMAIL PROTECTED]Subject: out of ideas on an error I am attempting to set up a servlet which acts as and rmi client. I am getting an error which I don't understand. Are their additional securitys I have to set or something?? Here's the error Internal Servlet Error: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:518) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174) at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265) at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) at org.apache.tomcat.core.Handler.service(Handler.java:254) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484)
out of ideas on an error
I am attempting to set up a servlet which acts as and rmi client. I am getting an error which I don't understand. Are their additional securitys I have to set or something?? Here's the error Internal Servlet Error:java.lang.NullPointerException at java.lang.ClassLoader.resolveClass0(Native Method) at java.lang.ClassLoader.resolveClass(ClassLoader.java:588) at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.java:518) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174) at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265) at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) at org.apache.tomcat.core.Handler.service(Handler.java:254) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484)
Re: out of ideas on an error
Hi, This is the most common error i get. I usually get if i try to compare or concat string variables that are null in value. Please check are your string variable. HTH Best Regards Moin. Kevin Fonner wrote: I am attempting to set up a servlet which acts as and rmi client. I am getting an error which I don't understand. Are their additional securitys I have to set or something??Here's the errorInternal Servlet Error: 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:518) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174) at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265) at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) at org.apache.tomcat.core.Handler.service(Handler.java:254) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484)
RE: out of ideas on an error
Hey nullpointers happen all the time look at the stack trace and c if you can work out whats wrong.. adcl loads the class at line 518 .. check it out what could be null?? the byte stream.. wouldn't yu xpect a IOException ?? resolveClass is inherited and works pretty damn well.. but what could cause a null pointer at line 588.. i don't know.. but look for telltale signs like method invocation on member ( the member could be null ) maybe the class is in the classpath on the incorrect location.. remove from classpath and put in server/lib or lib or webinf/lib or somewhere.. what happens? these things take for ever to solve.. good luck best wishes =) hey remember.. definite assignment detects possible npe @ compile time.. warren. -Original Message-From: Moin Anjum H. [mailto:[EMAIL PROTECTED]]Sent: Tuesday, 29 May 2001 2:43 PMTo: [EMAIL PROTECTED]Subject: Re: out of ideas on an errorHi, This is the most common error i get. I usually get if i try to compare or concat string variables that are null in value. Please check are your string variable. HTH Best Regards Moin. Kevin Fonner wrote: I am attempting to set up a servlet which acts as and rmi client. I am getting an error which I don't understand. Are their additional securitys I have to set or something??Here's the errorInternal Servlet Error: 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:518) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoader.java:174) at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:265) at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) at org.apache.tomcat.core.Handler.service(Handler.java:254) at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:210) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498) at java.lang.Thread.run(Thread.java:484)
