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Posted to user@velocity.apache.org by Michael Della Bitta <md...@columbia.edu> on 2003/12/02 20:18:38 UTC
configuring velocity + velocityServlet: feeling stupid
Hello,
This is not my first rollout of a Velocity-based application, which
makes me feel more stupid, because I'm having trouble getting Velocity
initialized with this application. I'm running Velocity 1.3.1 and
Tomcat 4.1.24 on Solaris. hitting my first servlet for the application
responds with the following stack trace:
VelocityServlet : Error processing the template
java.lang.NullPointerException
java.lang.NullPointerException
at
org.apache.catalina.connector.ResponseBase.setContentType(ResponseBase.j
ava:875)
at
org.apache.catalina.connector.HttpResponseBase.setContentType(HttpRespon
seBase.java:852)
at
org.apache.catalina.connector.ResponseFacade.setContentType(ResponseFaca
de.java:197)
at
org.apache.velocity.servlet.VelocityServlet.setContentType(VelocityServl
et.java:489)
at
org.apache.velocity.servlet.VelocityServlet.doRequest(VelocityServlet.ja
va:366)
at
org.apache.velocity.servlet.VelocityServlet.doGet(VelocityServlet.java:
333)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:644)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
481)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:187)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:644)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
481)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2398)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:181)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:644)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:167)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:642)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:165)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:642)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
510)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:642)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
481)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:175)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:644)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
481)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
at
org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:466)
at
org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:585)
at java.lang.Thread.run(Thread.java:534)
As my servlet's name is never mentioned, it seems as if the problem is
either with my configuration file or with my runtime environment.
Anybody have any pointers?
Michael Della Bitta
Columbia University
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Re: configuring velocity + velocityServlet: feeling stupid
Posted by Michael Della Bitta <md...@columbia.edu>.
On Dec 2, 2003, at 4:17 PM, Nathan Bubna wrote:
> Will Glass-Husain said:
>> The NPE is being generated from Tomcat due to a null value for the
>> content
>> type. That's a bit strange, the default content type should have
>> been set
>> when the servlet was init.
>
> yeah, that's a trip. did you override the init(ServletConfig) method
> in your
> subclass? if so, you need to be sure to call super.init(ServletConfig)
>
Hot dog, we have a wiener! :) That was it, thanks a lot!
Michael
p.s. This obviously does not absolve me from being stupid. :)
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Re: configuring velocity + velocityServlet: feeling stupid
Posted by Nathan Bubna <na...@esha.com>.
Will Glass-Husain said:
> The NPE is being generated from Tomcat due to a null value for the content
> type. That's a bit strange, the default content type should have been set
> when the servlet was init.
yeah, that's a trip. did you override the init(ServletConfig) method in your
subclass? if so, you need to be sure to call super.init(ServletConfig)
> (see
>
http://cvs.apache.org/viewcvs.cgi/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/connector/ResponseBase.java?rev=1.26&content-type=text/vnd.viewcvs-markup )
>
> It's also a little odd that your servlet isn't in the stack trace.
as long as he doesn't override doGet(), doRequest(), or setContentType(), then
this is to be expected.
> Does
> your web.xml file map to the servlet you wrote? (Maybe you could post your
> web.xml to the list). What's the URL you use to call the servlet?
i'm more curious about what methods you override/implement in your subclass.
something is screwy with the init. and it might not hurt to see pertinent
sections of your velocity.properties.
also, FYI, VelocityServlet is deprecated in forthcoming versions of Velocity
in favor of the VelocityViewServlet from the VelocityTools project. :)
...
> > VelocityServlet : Error processing the template
> > java.lang.NullPointerException
> > java.lang.NullPointerException
> > at
> > org.apache.catalina.connector.ResponseBase.setContentType(ResponseBase.j
> > ava:875)
...
> > org.apache.velocity.servlet.VelocityServlet.setContentType(VelocityServl
> > et.java:489)
> > at
> > org.apache.velocity.servlet.VelocityServlet.doRequest(VelocityServlet.ja
> > va:366)
> > at
> > org.apache.velocity.servlet.VelocityServlet.doGet(VelocityServlet.java:
> > 333)
...
Nathan Bubna
nathan@esha.com
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Re: configuring velocity + velocityServlet: feeling stupid
Posted by Will Glass-Husain <wg...@forio.com>.
Hi,
The NPE is being generated from Tomcat due to a null value for the content
type. That's a bit strange, the default content type should have been set
when the servlet was init.
(see
http://cvs.apache.org/viewcvs.cgi/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/connector/ResponseBase.java?rev=1.26&content-type=text/vnd.viewcvs-markup )
It's also a little odd that your servlet isn't in the stack trace. Does
your web.xml file map to the servlet you wrote? (Maybe you could post your
web.xml to the list). What's the URL you use to call the servlet?
WILL
----- Original Message -----
From: "Michael Della Bitta" <md...@columbia.edu>
To: "'Velocity Users List'" <ve...@jakarta.apache.org>
Sent: Tuesday, December 02, 2003 11:18 AM
Subject: configuring velocity + velocityServlet: feeling stupid
> Hello,
>
> This is not my first rollout of a Velocity-based application, which
> makes me feel more stupid, because I'm having trouble getting Velocity
> initialized with this application. I'm running Velocity 1.3.1 and
> Tomcat 4.1.24 on Solaris. hitting my first servlet for the application
> responds with the following stack trace:
>
> VelocityServlet : Error processing the template
> java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.catalina.connector.ResponseBase.setContentType(ResponseBase.j
> ava:875)
> at
> org.apache.catalina.connector.HttpResponseBase.setContentType(HttpRespon
> seBase.java:852)
> at
> org.apache.catalina.connector.ResponseFacade.setContentType(ResponseFaca
> de.java:197)
> at
> org.apache.velocity.servlet.VelocityServlet.setContentType(VelocityServl
> et.java:489)
> at
> org.apache.velocity.servlet.VelocityServlet.doRequest(VelocityServlet.ja
> va:366)
> at
> org.apache.velocity.servlet.VelocityServlet.doGet(VelocityServlet.java:
> 333)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
> tionFilterChain.java:247)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
> erChain.java:193)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
> e.java:256)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:644)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 481)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
> e.java:187)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:644)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 481)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
> 2398)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :181)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:644)
> at
> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
> lve.java:167)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:642)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :165)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:642)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
> 510)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:642)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 481)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:175)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
> nvokeNext(StandardPipeline.java:644)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 481)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:996)
> at
> org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:466)
> at
> org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:585)
> at java.lang.Thread.run(Thread.java:534)
>
>
> As my servlet's name is never mentioned, it seems as if the problem is
> either with my configuration file or with my runtime environment.
> Anybody have any pointers?
>
> Michael Della Bitta
> Columbia University
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: velocity-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: velocity-user-help@jakarta.apache.org
>
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