Getting null point exceptions in web app demo

[2002 JI Open Discussion]

By: Erich Kilmer - ekilmer

Getting null point exceptions in web app demo

2003-02-21 08:15

User ant to build jasper-webapp.war. Copied this into weblogic 7.0. Start up weblogic. I can bring up the index.html. When I try to run the PDF Output JSP example I get:

java.lang.NullPointerException

at java.io.File.(File.java:175)

at jsp_servlet._jsp.__pdf._jspService(__pdf.java:96)

at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)

at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1058)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:401)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:445)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:306)

at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5445)

at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:780)

at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3105)

at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2588)

at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)

at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)

 

When I try to run the PDF Output servlet example I get:

 

java.lang.NullPointerException

at java.io.File.<init>(File.java:175)

at servlets.PdfServlet.service(PdfServlet.java:100)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run

(ServletStubImpl.java:1058)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm

pl.java:401)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm

pl.java:306)

at weblogic.servlet.internal.WebAppServletContext$ServletInvocationActio

n.run(WebAppServletContext.java:5445)

at weblogic.security.service.SecurityServiceManager.runAs(SecurityServic

eManager.java:780)

at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe

rvletContext.java:3105)

at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm

pl.java:2588)

at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)

at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)

 

Since this is the first time I have run this I am sure its something in setup that I have not done.

 

Can anyone tell me what is missing?

 

TIA

 

 

 

 

By: Erich Kilmer - ekilmer

RE: Getting null point exceptions in web app demo

2003-02-21 08:55

I restarted weblogic and then went to the index.html page. Then went into compile. Tried to execute the JSP example and I get this:

 

java.lang.NullPointerException

at java.util.Hashtable.put(Hashtable.java:375)

at java.util.Properties.setProperty(Properties.java:97)

at java.lang.System.setProperty(System.java:637)

at jsp_servlet._jsp.__compile._jspService(__compile.java:97)

at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)

at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1058)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:401)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:445)

at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:306)

at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5445)

at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:780)

at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3105)

at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2588)

at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)

at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)

 

I thought the jasper-webapp.war would be self contained. Is there something that I haven't put somewhere?

 

 

 

 

By: Erich Kilmer - ekilmer

RE: Getting null point exceptions in web app demo

2003-02-21 11:14

Fixed this by doing 2 things.

First I extracted the jasper-webapp.war into a directory called jasper at the same level.

When I restarted WebLogic I started getting ClassNotFound for SaxParser.

Tried copying xercesImpl.jar to WEB-INF/lib under jasper but was still got same error.

Copied xercesImpl,jar up to the lib under the domain.

Restarted WebLogic and the compile sample works.

Still getting errors in PDF demo.