wondering if anyone has seen this while running the admin webapp from
tomcat 5.0.16?

running the admin webapp, when clicking on the Service (Catalina) link
in the left side frame, i get the following stack trace:

type Exception report

message

description The server encountered an internal error () that prevented
it from fulfilling this request.

exception

javax.servlet.ServletException: Define tag cannot set a null value

org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageCon
textImpl.java:867)

org.apache.jasper.runtime.PageContextImpl.handlePageException(PageConte
xtImpl.java:800)
 admin.service.service_jsp._jspService(service_jsp.java:840)
 org.apache.jasper.runtime.HttpJspBase.service (HttpJspBase.java:133)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:856)

org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.ja
va:1069)

org.apache.struts.action.RequestProcessor.processForwardConfig(RequestP
rocessor.java:455)

org.apache.struts.action.RequestProcessor.process(RequestProcessor.java
:279)
 org.apache.struts.action.ActionServlet.process (ActionServlet.java:1482)
 org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:507)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:743)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:856)

root cause

javax.servlet.jsp.JspException: Define tag cannot set a null value
 org.apache.struts.taglib.bean.DefineTag.doEndTag (DefineTag.java:272)
 admin.service.service_jsp._jspService(service_jsp.java:235)
 org.apache.jasper.runtime.HttpJspBase.service (HttpJspBase.java:133)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:856)

org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.ja
va:1069)

org.apache.struts.action.RequestProcessor.processForwardConfig(RequestP
rocessor.java:455)

org.apache.struts.action.RequestProcessor.process(RequestProcessor.java
:279)
 org.apache.struts.action.ActionServlet.process (ActionServlet.java:1482)
 org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:507)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:743)
 javax.servlet.http.HttpServlet.service (HttpServlet.java:856)

note The full stack trace of the root cause is available in the Tomcat
logs.

in the tomcat logs:

2004-01-20 12:13:52 StandardContext[/admin]action: Entered
TreeControlTestAction:perform()
2004-01-20 12:13:52 StandardContext[/admin]action: tree param is null
2004-01-20 12:13:52 StandardContext[/admin]action: Select event on
Standalone:type=Service,serviceName=Catalina
2004-01-20 12:13:52 ApplicationDispatcher[/admin] Servlet.service() for
servlet admin.service.service_jsp threw exception
javax.servlet.jsp.JspException: Define tag cannot set a null value
    at
org.apache.struts.taglib.bean.DefineTag.doEndTag (DefineTag.java:272)
    at admin.service.service_jsp._jspService(service_jsp.java:235)
    at
org.apache.jasper.runtime.HttpJspBase.service (HttpJspBase.java:133)
<snip>

my <Service> element from web.xml looks like:

<Service name="Catalina">
  <Connector port="8008"
         maxThreads="150" minSpareThreads="25"
maxSpareThreads="75"
         enableLookups="false" redirectPort="8443"
acceptCount="100"
         debug="0" connectionTimeout="20000"
         disableUploadTimeout="true">
    <!-- Restrict access -->
    <Valve className="org.apache.catalina.valves.RemoteAddrValve"
        allow="localhost,127.0.0.1,192.168.0.*,192.168.100.*"/>
  </Connector>

  <Connector address="192.168.100.152" port="8009" redirectPort="8443"
         debug="0" enableLookups="false"
         protocol="AJP/1.3" />

  <Engine name="Standalone" defaultHost="192.168.100.152" debug="0"
       jvmRoute="app4">      

   <Logger className="org.apache.catalina.logger.FileLogger"
        prefix="catalina_log." suffix=".txt"
        timestamp="true"/>

   <Host name="192.168.100.152" debug="0" appBase="webapps"
    unpackWARs="true" autoDeploy="true"
    xmlValidation="false" xmlNamespaceAware="false">

    <Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
           name="ValidationCluster"
           debug="32"
         
serviceclass="org.apache.catalina.cluster.mcast.McastService"
           mcastAddr="228.1.2.4"
           mcastPort="45566"
           msgFrequency="500"
    mcastFrequency="500"
           mcastDropTime="3000"
           tcpThreadCount="10"
           tcpListenAddress="192.168.100.152"
           tcpListenPort="4001"
           tcpSelectorTimeout="100"
           printToScreen="true"
           expireSessionsOnShutdown="false"
           useDirtyFlag="true"
           replicationMode="pooled"
         
managerClassName="org.apache.catalina.cluster.session.SimpleTcpReplicat
ionManager"
    />
    <Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"
       
filter=".*\.gif;.*\.js;.*\.jpg;.*\.htm;.*\.html;.*\.txt;"/>

    <Context path="/manager" debug="0" privileged="true"
         
docBase="/home/tomcat/tomcat5/inst1/server/webapps/manager">
      <Realm className="org.apache.catalina.realm.MemoryRealm" />
    </Context>

    <Context path="/admin" debug="0" privileged="true"
         
docBase="/home/tomcat/tomcat5/inst1/server/webapps/admin">
      <Realm className="org.apache.catalina.realm.MemoryRealm" />
    </Context>
   </Host>

  </Engine>

</Service>


any ideas?

---------------------------------------------------------------------
To unsubscribe, e-mail: tomcat-user-unsubscribe@(protected)
For additional commands, e-mail: tomcat-user-help@(protected)