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Posted to user@cayenne.apache.org by Papa Issa DIAKHATE <pa...@gmail.com> on 2011/12/06 15:39:10 UTC

problem when HessianServlet is called (nullpointerexception) cayenne 3.0.2

Hello guys,

i'm using cayenne 3.0.2 and i get NullPointerException when the servlet
mapped to HessianServlet class is called.
here is my web.xml

<servlet>
 <description>Cayenne Webservice</description>
<display-name>Cayenne Webservice</display-name>
 <servlet-name>WebserviceServlet</servlet-name>
<servlet-class>org.apache.cayenne.remote.hessian.service.HessianServlet</servlet-class>
 <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>WebserviceServlet</servlet-name>
<url-pattern>/cayenne-service</url-pattern>
 </servlet-mapping>

as you can see, the HessianServlet is the 1st servlet which is loaded in my
webapp, my the problem is i always get this exception .... always

java.lang.NullPointerException
at
org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
 at
org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
 at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
 at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
6 déc. 2011 15:29:10 org.apache.catalina.core.StandardContext loadOnStartup
GRAVE: La servlet /thaleia a généré une exception "load()"
java.lang.NullPointerException
at
org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
 at
org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
 at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
 at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)


here is my cayenne.xml in src/
<?xml version="1.0" encoding="utf-8"?>
<domains project-version="3.0.0.1">
 <domain name="AppDomain">
<map name="AppMap" location="AppMap.map.xml" />

<node name="AppNode" datasource="jdbc/myds"
factory="org.apache.cayenne.conf.JNDIDataSourceFactory"
 <map-ref name="AppMap" />
</node>
</domain>
</domains>

in the same directory -> src/ , i also have AppMap.map.xml and
AppNode.driver.xml

Why do i get that exception ?
thanks in advance for helping

paissad,

Re: problem when HessianServlet is called (nullpointerexception) cayenne 3.0.2

Posted by Papa Issa DIAKHATE <pa...@gmail.com>.

Hmm, the cayenne.xml was correctly located in WEB-INF/classes/ after the
creation of the .war, .. but anyway that was not the problem ! i have no
more NullPointerException, don't know why, .. but the the issue is "gone".

2011/12/9 Andrus Adamchik <an...@objectstyle.org>

> Where is your cayenne.xml located in the assembled .war file? Wonder if it
> goes missing somehow when you assemble your webapp.
>
> Andrus
>
>
> On Dec 6, 2011, at 4:39 AM, Papa Issa DIAKHATE wrote:
>
> > Hello guys,
> >
> > i'm using cayenne 3.0.2 and i get NullPointerException when the servlet
> > mapped to HessianServlet class is called.
> > here is my web.xml
> >
> > <servlet>
> > <description>Cayenne Webservice</description>
> > <display-name>Cayenne Webservice</display-name>
> > <servlet-name>WebserviceServlet</servlet-name>
> >
> <servlet-class>org.apache.cayenne.remote.hessian.service.HessianServlet</servlet-class>
> > <load-on-startup>0</load-on-startup>
> > </servlet>
> > <servlet-mapping>
> > <servlet-name>WebserviceServlet</servlet-name>
> > <url-pattern>/cayenne-service</url-pattern>
> > </servlet-mapping>
> >
> > as you can see, the HessianServlet is the 1st servlet which is loaded in
> my
> > webapp, my the problem is i always get this exception .... always
> >
> > java.lang.NullPointerException
> > at
> >
> org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
> > at
> >
> org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
> > at
> >
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> > at
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
> > at
> >
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
> > at
> > org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
> > at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> > at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
> > at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> > at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> > at
> org.apache.catalina.core.StandardService.start(StandardService.java:516)
> > at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
> > at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> > at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > at java.lang.reflect.Method.invoke(Method.java:597)
> > at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
> > at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
> > 6 déc. 2011 15:29:10 org.apache.catalina.core.StandardContext
> loadOnStartup
> > GRAVE: La servlet /thaleia a généré une exception "load()"
> > java.lang.NullPointerException
> > at
> >
> org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
> > at
> >
> org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
> > at
> >
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> > at
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
> > at
> >
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
> > at
> > org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
> > at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> > at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
> > at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> > at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> > at
> org.apache.catalina.core.StandardService.start(StandardService.java:516)
> > at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
> > at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> > at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > at java.lang.reflect.Method.invoke(Method.java:597)
> > at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
> > at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
> >
> >
> > here is my cayenne.xml in src/
> > <?xml version="1.0" encoding="utf-8"?>
> > <domains project-version="3.0.0.1">
> > <domain name="AppDomain">
> > <map name="AppMap" location="AppMap.map.xml" />
> >
> > <node name="AppNode" datasource="jdbc/myds"
> > factory="org.apache.cayenne.conf.JNDIDataSourceFactory"
> > <map-ref name="AppMap" />
> > </node>
> > </domain>
> > </domains>
> >
> > in the same directory -> src/ , i also have AppMap.map.xml and
> > AppNode.driver.xml
> >
> > Why do i get that exception ?
> > thanks in advance for helping
> >
> > paissad,
>
>

Re: problem when HessianServlet is called (nullpointerexception) cayenne 3.0.2

Posted by Andrus Adamchik <an...@objectstyle.org>.

Where is your cayenne.xml located in the assembled .war file? Wonder if it goes missing somehow when you assemble your webapp.

Andrus 


On Dec 6, 2011, at 4:39 AM, Papa Issa DIAKHATE wrote:

> Hello guys,
> 
> i'm using cayenne 3.0.2 and i get NullPointerException when the servlet
> mapped to HessianServlet class is called.
> here is my web.xml
> 
> <servlet>
> <description>Cayenne Webservice</description>
> <display-name>Cayenne Webservice</display-name>
> <servlet-name>WebserviceServlet</servlet-name>
> <servlet-class>org.apache.cayenne.remote.hessian.service.HessianServlet</servlet-class>
> <load-on-startup>0</load-on-startup>
> </servlet>
> <servlet-mapping>
> <servlet-name>WebserviceServlet</servlet-name>
> <url-pattern>/cayenne-service</url-pattern>
> </servlet-mapping>
> 
> as you can see, the HessianServlet is the 1st servlet which is loaded in my
> webapp, my the problem is i always get this exception .... always
> 
> java.lang.NullPointerException
> at
> org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
> at
> org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
> at
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> at org.apache.catalina.core.StandardService.start(StandardService.java:516)
> at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
> at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
> 6 déc. 2011 15:29:10 org.apache.catalina.core.StandardContext loadOnStartup
> GRAVE: La servlet /thaleia a généré une exception "load()"
> java.lang.NullPointerException
> at
> org.apache.cayenne.remote.hessian.service.HessianService.createSerializerFactory(HessianService.java:72)
> at
> org.apache.cayenne.remote.hessian.service.HessianServlet.init(HessianServlet.java:77)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
> at
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> at org.apache.catalina.core.StandardService.start(StandardService.java:516)
> at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
> at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
> 
> 
> here is my cayenne.xml in src/
> <?xml version="1.0" encoding="utf-8"?>
> <domains project-version="3.0.0.1">
> <domain name="AppDomain">
> <map name="AppMap" location="AppMap.map.xml" />
> 
> <node name="AppNode" datasource="jdbc/myds"
> factory="org.apache.cayenne.conf.JNDIDataSourceFactory"
> <map-ref name="AppMap" />
> </node>
> </domain>
> </domains>
> 
> in the same directory -> src/ , i also have AppMap.map.xml and
> AppNode.driver.xml
> 
> Why do i get that exception ?
> thanks in advance for helping
> 
> paissad,