nullpointer when precompile jsp with tag

["Fan, Hong" <Ho...@gs.com>]

Hi
 
I tried to precompile a jsp page which uses tags using ant jspc task
documented in tomcat 4.1.24, but it generated nullpointer exception. I
believe there is similar post regarding the same problem. Does any one know
the cause?
 
Thanks
 
 
http://www.mail-archive.com/tomcat-user@jakarta.apache.org/msg91565.html
<http://www.mail-archive.com/tomcat-user@jakarta.apache.org/msg91565.html> 
 
 
Hi.

My project has jsps, some of which use jstl/jakarta taglibs.
I use ant to pre-compile/compile my jsps manually. All jsps which dont use
taglibs still precompile/compile happily. However jsps with jstl/taglibs do
NOT compile with ant because of some nullpointer exception:

jsp_precompile:
     [jspc] Compiling 64 source
filesC:\jakarta\tomcat\work\Standalone\localhost\northstar
  [jasperc] 2003-03-31 04:08:57 - ERROR-the file
'\Accounting\GL\Budgets\budgetSetupWizard\budgetList.jsp' generated the
following general exception: java.lang.NullPointerException
  [jasperc] error:org.apache.jasper.JasperException: Error compiling
\Accounting\GL\Budgets\budgetSetupWizard\budgetList.jsp
  [jasperc]     at org.apache.jasper.JspC.processFile(JspC.java:596)
  [jasperc]     at org.apache.jasper.JspC.execute(JspC.java:800)
  [jasperc]     at org.apache.jasper.JspC.main(JspC.java:822)
  [jasperc] Java Result: 9

The interesting thing is that these same jsps run with no problem on tomcat,
i.e. tomcat will precompile/compile them at run time and they work fine....

Does anyone know whats going on? How can I get Ant to do the precompile.

I posted this on the ant-user list thinking it was an Ant problem. However,
it seems like it is more of a jasper/tomcat issue.... My message on the
ant-user list and its reply:
http://marc.theaimsgroup.com/?t=104915758600001
<http://marc.theaimsgroup.com/?t=104915758600001&r=1&w=2> &r=1&w=2

My environment:
ant 1.5.2
tomcat 4.1.21
taglibs 1.0
jdk 1.4.1_01

Thanks.

Hammad.

 <http://www.mail-archive.com/tomcat-user@jakarta.apache.org/msg91565.html> 

Re: nullpointer when precompile jsp with tag

[Johann Uhrmann <jo...@xpecto.com>]

Hi,

I have a hint on that issue:

The jasper compiler crashes if the TLD contains a <variable>-section.

In my case, commenting out the following section from my TLD
made jasper run without any errors:

<variable>
   <name-from-attribute>var</name-from-attribute>
   <variable-class>java.lang.Boolean</variable-class>
   <declare>true</declare>
   <scope>NESTED</scope>
   <description>Variable that becomes true if the tag body is 
evaluated.</description>
</variable>


Can someone please verify that?

Thanks,

Hans


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