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2007-08-16 - By ian.blenk@(protected)

Back

I'm upgrading from tomcat 4.1.24 to tomcat 5.5.12 on WinXP. I have three
applications that are deployed from this
server, two of which work fine with tomcat 5.5.12, however the third which uses
an oracle 9i database gives me the
following error "javax.servlet.ServletException: Cannot create JDBC driver of
class '' for connect URL 'null' ".
Basically I've included the same details form the Tomcat4 server.xml file into
the tomcat 5.5 server.xml, rediting
where necessary.

Things I have tried..

Placing the context into fragment files located either inside the applications
META-INF folder or under
tomcat\conf\Catalina\localhost. Neither of these seemd to work for me as Tomcat
could not find the apps, so I've
left the context back in server.xml.
Rewriting the Resource params <parameter> as elements i.e.factory="com.ora.jsp
.sql.DataSourceFactory"
Checked changed location of the JDBC jar file. classes12.jar catalina_home
\common\lib\ AND
catalina_home\webapps\[appname]\WEB-INF\lib
Checked changed the server.xml service-name and engine name to match previous
TC4 server.xml version.
Added a Resourcelink element to the context - this is not present on the TC4
version
Checked Tomcat logs.

I think that Tomcat is not able to read the <ResourceParams> element, which is
why the URL and driverClass are
NULL.

Which When I checked the Tomcat log files shows ...

16-Aug-2007 (See http://Aug-2007.ora-code.com) 09:25:46 org.apache.catalina.core.ApplicationContext log
SEVERE: action: Cannot create JDBC driver of class '' for connect URL 'null'

Background info
Using Apache 2.0 with mod_JK to serve pages on port 80
Java version 1.5

**** server.xml ****



<Server port="8005" shutdown="SHUTDOWN" debug="0">

<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
debug="0"/>
<Listener className="org.apache.catalina.mbeans
.GlobalResourcesLifecycleListener" debug="0"/>


<GlobalNamingResources>


<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" ></Resource>

</GlobalNamingResources>

<Service name="Catalina">

<Connector port="8009"
enableLookups="true" redirectPort="8443" protocol="AJP/1.3" />

<Engine name="Catalina" defaultHost="opp-online" debug="0">

<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>

<Host name="opportunities-online" debug="0" appBase="webapps" >

<Context path="/staff" docBase="oponline/staff" cookies="true"
reloadable="true">
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="staff_access_log." suffix=".txt"
pattern="combined" resolveHosts="false"/>

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

<ResourceParams name="jdbc/oponline"
factory="com.ora.jsp.sql.DataSourceFactory"
user="myuser"
password="mypassword"
dataSourceClassName="oracle.jdbc.pool
.OracleConnectionCacheImpl"
URL="jdbc:oracle:thin:@(protected):1521
:MYTE"
maxLimit="5" />




</Context>

</Host>

</Engine>

</Service>

</Server>

*** end server.xml ***

*** App web.xml except ***

<resource-ref>
<description>
JNDI DataSource for [appname] database.
(From Oreilly "JavaServer Pages", Bergsten, 2nd Ed., page 485)
</description>
<res-ref-name>jdbc/oponline</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>

*** end web.xml ***

Thanks

Ian

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