it is possible that the problem stems from Tomcat itself. The reason i say that, is because i have setup a dbcp connection (using Tomcat 4.1, jdk 1.4, oracle on win2k), and i have managed to get it to work with a particular application, but get the same "Cannot load JDBC driver class 'null'" when try to use connection with ROOT application, or with any other application. It is weird, and i have not figured out what problem is. Also, there are many previous emails in this user-group pertaining to this Cannot-load-JDBC error, esp. when associated with use as a global resource.
-paul lomack p.s. i would be happy to report my server.xml or web.xml or jsp code for calling connection, if you think it may be of any use to you. ----- Original Message ----- From: "Ilja Hehenkamp" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, September 15, 2003 9:10 AM Subject: Re: Tomcat, MySQL & JNDI: java.sql.SQLException: Cannot load JDBC driver class 'null' > I think I know where lies the problem, however I still don't know how to fix > it... > > I use the sample build.xml file from Tomcat: > http://jakarta.apache.org/tomcat/tomcat-5.0-doc/appdev/build.xml.txt to > install, reload and distribute my sample application. > > When I do an ant -install it apparantly installs the application in the > Tomcat manager, however the application doesn't show up in the webapps > directory. That's 1. > > So maybe there's a conflict with either the context path, which I don't > think so, since my build file has explicitly set the context path to > /DBTest: > > <property name="app.name" value="DBTest"/> > <property name="app.path" value="/${app.name}"/> > <property name="app.version" value=""/> > <property name="build.home" value="${basedir}/build"/> > <property name="catalina.home" value="/Library/Tomcat"/> <!-- UPDATE THIS! > --> > <property name="dist.home" value="${basedir}/dist"/> > <property name="docs.home" value="${basedir}/docs"/> > <property name="manager.url" value="http://localhost:8080/manager"/> > <property name="src.home" value="${basedir}/src"/> > <property name="web.home" value="${basedir}/web"/> > > Or there's a conflict with the docbase, which I suspect... However I'm not > sure why and how to fix it.... > > Because when I put the generated war file (when doing an ant -dist) in the > webapps directory the connection works! Although this works, it's not very > convenient, since it defeats the purpose of the automated installing through > ant... > > Hope I made myself clear? > > >From: Martin Jacobson <[EMAIL PROTECTED]> > >Reply-To: "Tomcat Users List" <[EMAIL PROTECTED]> > >To: Tomcat Users List <[EMAIL PROTECTED]> > >Subject: Re: Tomcat, MySQL & JNDI: java.sql.SQLException: Cannot load JDBC > >driver class 'null' > >Date: Mon, 15 Sep 2003 14:00:52 +0200 > > > >Ilja wrote: > >>Ok, first some configuration information: > >> > >>Tomcat 5.09 > >>MySQL Driver 3.08 stable > >>OS: Mac OSX 10.2.6 > >>J2SE 1.4.2 > >> > > > >My config is not the same (TC 4.1.24, OSX 10.2.6, MySQL 3.07), and my > >parameters are different: > > <ResourceParams name="jdbc/EuratomDB"> > > <parameter> > > <name>factory</name> > > <value>org.apache.commons.dbcp.BasicDataSourceFactory</value> > > </parameter> > > <parameter> > > <name>maxActive</name> > > <value>100</value> > > </parameter> > > <parameter> > > <name>maxIdle</name> > > <value>30000</value> > > </parameter> > > <parameter> > > <name>maxWait</name> > > <value>100</value> > > </parameter> > > <parameter> > > <name>username</name> > > <value>xxx</value> > > </parameter> > > <parameter> > > <name>password</name> > > <value>xxx</value> > > </parameter> > > <parameter> > > <name>driverClassName</name> > > <value>com.mysql.jdbc.Driver</value> > > </parameter> > > <parameter> > > <name>url</name> > > <value>jdbc:mysql://localhost/euratom?autoReconnect=true</value> > > </parameter> > > </ResourceParams> > > > >This works for me! The main diffs are (i) I specify the <factory>, and > >(ii), the driverClassName is com.mysql.jdbc.Driver > > > >However, the exception seems to suggest that the correct factory is being > >used by default. Your driverClassName is the old name, and might not be in > >the jar file any more. > > > >HTH > >Martin > > > > > >--------------------------------------------------------------------- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, e-mail: [EMAIL PROTECTED] > > > > _________________________________________________________________ > MSN Zoeken, voor duidelijke zoekresultaten! http://search.msn.nl > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
