5 Replies Latest reply on Sep 28, 2007 4:27 PM by ana konst

    "Stack must not be null" error when using ajax4jsf with seam

    Zalder R Newbie

      I'm using ajax4jsf inside seam 1.2.1 and I get an error : "javax.servlet.ServletException: Stack must not be null" when I click on a a4j checkbox button

      <h:selectBooleanCheckbox id="displayCheck" value="#{myManager.updateDisplay}">
      <a:support event="onchange" reRender="results" />
      </h:selectBooleanCheckbox>

      This happens only the first time I access the page (that basically displays a list that can be viewed two ways (according to the state of the boolean)) : if I reload the page I don't get the error anymore and everything is fine.

      With previous releases of seam, I had, at the exact same time, the "id must not be null" error and found out on ajax4jsf forums that this was due to a bug fixed in seam 1.2.1. But it seems to me there is still some kind of a problem ...

      Here is the complete stack trace :
      16:52:44,071 ERROR [ExceptionFilter] uncaught exception
      javax.servlet.ServletException: Stack must not be null
      at javax.faces.webapp.FacesServlet.service(FacesServlet.java:152)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
      at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60)
      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
      at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
      at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
      at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
      at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96)
      at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
      at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
      at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
      at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
      at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
      at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
      at java.lang.Thread.run(Thread.java:595)


      Any idea of what can be wrong ?