5 Replies Latest reply on May 29, 2006 12:32 PM by gavin.king

java.lang.NullPointerException at at org.jboss.seam.context

mmarcom May 28, 2006 1:21 PM

Hi all,
i m trying to write a small app using jboss-seam
i am using latest seam from CVS and i am deplolying on jboss-4.0.4.GA.
i am getting this exception while accessing a index.html page (similar to those of examples...), and i am using facelets...

here's exception

17:14:48,781 ERROR [SeamExceptionFilter] uncaught exception handled by Seam
javax.servlet.ServletException
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:125)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter
.java:45)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilt
er.java:89)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:175)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:869)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
rocessConnection(Http11BaseProtocol.java:664)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
kerThread.java:112)
 at java.lang.Thread.run(Unknown Source)
17:14:48,796 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet
 threw exception
java.lang.NullPointerException
 at org.jboss.seam.contexts.PageContext.getCurrentReadableMap(PageContext
.java:123)
 at org.jboss.seam.contexts.PageContext.get(PageContext.java:103)
 at org.jboss.seam.core.Manager.restoreConversation(Manager.java:907)
 at org.jboss.seam.jsf.AbstractSeamPhaseListener.restoreAnyConversationCo
ntext(AbstractSeamPhaseListener.java:81)
 at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.jav
a:63)
 at org.jboss.seam.jsf.SeamExtendedManagedPersistencePhaseListener.afterP
hase(SeamExtendedManagedPersistencePhaseListener.java:109)
 at org.apache.myfaces.lifecycle.LifecycleImpl.informPhaseListenersAfter(
LifecycleImpl.java:536)
 at org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.
java:164)
 at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java
:66)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter
.java:45)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilt
er.java:89)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
lter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
yAssociationValve.java:175)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
e.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

here's my web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
 <display-name>Archetype Created Web Application</display-name>



 <listener>
 <listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
 </listener>

 <listener>
 <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
 </listener>


 <!-- Global JNDI name pattern for JBoss EJB3 (change for other servers) -->
 <context-param>
 <param-name>org.jboss.seam.core.init.jndiPattern</param-name>
 <param-value>${ear.name}-1.0/#{ejbName}/local</param-value>
 </context-param>


 <context-param>
 <param-name>org.jboss.seam.core.init.componentClasses</param-name>
 <param-value></param-value>
 </context-param>

 <context-param>
 <param-name>org.jboss.seam.core.init.myFacesLifecycleBug</param-name>
 <param-value>true</param-value>
 </context-param>

 <!-- Facelets -->
 <!-- Facelets start -->
 <!-- Use Documents Saved as *.xhtml -->
 <context-param>
 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
 <param-value>.xhtml</param-value>
 </context-param>
 <!-- Special Debug Output for Development -->
 <context-param>
 <param-name>facelets.DEVELOPMENT</param-name>
 <param-value>true</param-value>
 </context-param>
 <!-- Facelets end -->







 <!-- MyFaces -->
 <context-param>
 <param-name>javax.faces.CONFIG_FILES</param-name>
 <param-value>/WEB-INF/faces-config.xml</param-value>
 </context-param>


 <context-param>
 <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
 <param-value>client</param-value>
 <description>
 State saving method: "client" or "server" (= default)
 See JSF Specification 2.5.2
 </description>
 </context-param>

 <context-param>
 <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
 <param-value>true</param-value>
 <description>
 This parameter tells MyFaces if javascript code should be allowed in the
 rendered HTML output.
 If javascript is allowed, command_link anchors will have javascript code
 that submits the corresponding form.
 If javascript is not allowed, the state saving info and nested parameters
 will be added as url parameters.
 Default: "true"
 </description>
 </context-param>

 <context-param>
 <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
 <param-value>false</param-value>
 </context-param>

 <context-param>
 <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
 <param-value>true</param-value>
 <description>
 If true, rendered HTML code will be formatted, so that it is "human readable".
 i.e. additional line separators and whitespace will be written, that do not
 influence the HTML code.
 Default: "true"
 </description>
 </context-param>

 <context-param>
 <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
 <param-value>true</param-value>
 <description>
 If true, a javascript function will be rendered that is able to restore the
 former vertical scroll on every request. Convenient feature if you have pages
 with long lists and you do not want the browser page to always jump to the top
 if you trigger a link or button action that stays on the same page.
 Default: "false"
 </description>
 </context-param>

 <context-param>
 <param-name>facelets.REFRESH_PERIOD</param-name>
 <param-value>2</param-value>
 </context-param>

 <filter>
 <filter-name>Seam Exception Filter</filter-name>
 <filter-class>org.jboss.seam.servlet.SeamExceptionFilter</filter-class>
 </filter>

 <filter>
 <filter-name>Seam Redirect Filter</filter-name>
 <filter-class>org.jboss.seam.servlet.SeamRedirectFilter</filter-class>
 </filter>

 <filter-mapping>
 <filter-name>Seam Exception Filter</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>

 <filter-mapping>
 <filter-name>Seam Redirect Filter</filter-name>
 <url-pattern>*.seam</url-pattern>
 </filter-mapping>


 <servlet>
 <servlet-name>Faces Servlet</servlet-name>
 <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
 </servlet>

 <!-- Faces Servlet Mapping -->
 <servlet-mapping>
 <servlet-name>Faces Servlet</servlet-name>
 <url-pattern>*.seam</url-pattern>
 </servlet-mapping>

</web-app>
[/code/

here's my faces-config.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE faces-config PUBLIC
 "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
 "http://java.sun.com/dtd/web-facesconfig_1_0.dtd">

 <faces-config>
 <navigation-rule>
 <navigation-case>
 <from-outcome>success</from-outcome>
 <to-view-id>/result.xhtml</to-view-id>
 </navigation-case>
 </navigation-rule>

 <navigation-rule>
 <navigation-case>
 <from-outcome>error</from-outcome>
 <to-view-id>/error.xhtml</to-view-id>
 </navigation-case>
 </navigation-rule>

 <navigation-rule>
 <navigation-case>
 <from-outcome>start</from-outcome>
 <to-view-id>/register.xhtml</to-view-id>
 </navigation-case>
 </navigation-rule>


 <navigation-rule>
 <navigation-case>
 <from-outcome>end</from-outcome>
 <to-view-id>/end.xhtml</to-view-id>
 </navigation-case>
 </navigation-rule>


 <application>
 <message-bundle>messages</message-bundle>
 <locale-config>
 <default-locale>en_US</default-locale>
 <supported-locale>en</supported-locale>
 </locale-config>
 </application>

 <application>
 <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
 </application>

 <lifecycle>
 <phase-listener>org.jboss.seam.jsf.SeamExtendedManagedPersistencePhaseListener</phase-listener>
 </lifecycle>


 </faces-config>



and here's my simple index.html page

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="refresh" content="0; url=register.seam" />
<title>Untitled Document</title>
</head>

<body>
</body>
</html>



i saw a similar post dated 9th may, but there was no solution at theend..

could anyone help me out?

thanks and regards
 marco

1. Re: java.lang.NullPointerException at at org.jboss.seam.con

gavin.king May 28, 2006 1:45 PM (in response to mmarcom)

This can sometimes happen if you double-click.

You might need some solution to serialize requests.
Actions
2. Re: java.lang.NullPointerException at at org.jboss.seam.con

mmarcom May 28, 2006 1:59 PM (in response to mmarcom)
hello gavin,
but problem here is that i am not clicking at all...
i am just loading a page..

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="refresh" content="0; url=register.seam" /> <title>Untitled Document</title> </head> <body> </body> </html>

it is while this page is getting loaded that everythings falls over :(

is thtere any workaround that you can suggest?

thanks and regards
marco
Actions
3. Re: java.lang.NullPointerException at at org.jboss.seam.con

gavin.king May 28, 2006 2:07 PM (in response to mmarcom)

Then I don't know. Perhaps you have two SeamPhaseListeners registered.

Use your debugger.
Actions
4. Re: java.lang.NullPointerException at at org.jboss.seam.con

mmarcom May 29, 2006 6:14 AM (in response to mmarcom)

hello,
i fixed it...
solution was mentioned in this forum entry

http://jboss.org/index.html?module=bb&op=posting&mode=quote&p=3897190

it was :( exactlyw hat i was doing.. declaring a context-param for faces-config.xml

sorry for bothering

rgds
marco
Actions
5. Re: java.lang.NullPointerException at at org.jboss.seam.con

gavin.king May 29, 2006 12:32 PM (in response to mmarcom)

Now added to the FAQ:

http://wiki.jboss.org/wiki/Wiki.jsp?page=SeamProblemsFAQ
Actions

Go to original post