What release of Tomcat are you using? If it is 5.5.x, you can not alter the Server.xml file. You will need to create a context file and place it into your META_INF directory in your application. Tomcat will place it into your CATALINA_HOME\conf\Catalina\localhost directory when the application is started.
-----Original Message----- From: chuanjiang lo [mailto:[EMAIL PROTECTED] Sent: Monday, February 20, 2006 7:25 AM To: Tomcat Users List Subject: Re: JNDI Datasource Problem i think you would need to change the context.xml? On 2/20/06, Mark Whitby <[EMAIL PROTECTED]> wrote: > > Hey guys, > > Thanks for the help with the previous problem I had, I've managed to solve > them now thanks to your help. But now I'm having a problem with setting up > a DataSource connection. I've followed the example word for word and got > the following error: > > javax.servlet.ServletException: Unable to get connection, DataSource > invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create > JDBC driver of class '' for connect URL 'null'" > > I did a google search for this but only managed to find something on the > NetBeans website which wasn't much help. I've edited the server.xml file > as stated, placed the relevent jar file ( > mysql-connector-java-3.1.12-bin.jar) in the lib folder in my web > application and in the /common/lib folder in the Tomcat home folder and I've > reset the server and I'm still getting the same problem. > > I'm using MySQL, database is called 'fyptest' and the table is called > 'testdata'. So where am I going wrong? > > Many thanks > > Mark Whitby > > Server.xml file: > > <Context path="/DBTest" docBase="DBTest" > debug="5" reloadable="true" crossContext="true"> > > <Logger className="org.apache.catalina.logger.FileLogger" > prefix="localhost_DBTest_log." suffix=".txt" > timestamp="true"/> > > <Resource name="jdbc/TestDB" > auth="Container" > type="javax.sql.DataSource"/> > > <ResourceParams name="jdbc/TestDB"> > <parameter> > <name>factory</name> > <value>org.apache.commons.dbcp.BasicDataSourceFactory</value> > </parameter> > > <!-- Maximum number of dB connections in pool. Make sure you > configure your mysqld max_connections large enough to handle > all of your db connections. Set to 0 for no limit. > --> > <parameter> > <name>maxActive</name> > <value>100</value> > </parameter> > > <!-- Maximum number of idle dB connections to retain in pool. > Set to -1 for no limit. See also the DBCP documentation on this > and the minEvictableIdleTimeMillis configuration parameter. > --> > <parameter> > <name>maxIdle</name> > <value>30</value> > </parameter> > > <!-- Maximum time to wait for a dB connection to become available > in ms, in this example 10 seconds. An Exception is thrown if > this timeout is exceeded. Set to -1 to wait indefinitely. > --> > <parameter> > <name>maxWait</name> > <value>10000</value> > </parameter> > > <!-- MySQL dB username and password for dB connections --> > <parameter> > <name>username</name> > <value>javauser</value> > </parameter> > <parameter> > <name>password</name> > <value>pilks2</value> > </parameter> > > <!-- Class name for the old mm.mysql JDBC driver - uncomment this > entry and comment next > if you want to use this driver - we recommend using Connector/J > though > <parameter> > <name>driverClassName</name> > <value>org.gjt.mm.mysql.Driver</value> > </parameter> > --> > > <!-- Class name for the official MySQL Connector/J driver --> > <parameter> > <name>driverClassName</name> > <value>com.mysql.jdbc.Driver</value> > </parameter> > > <!-- The JDBC connection url for connecting to your MySQL dB. > The autoReconnect=true argument to the url makes sure that the > mm.mysql JDBC Driver will automatically reconnect if mysqld > closed the > connection. mysqld by default closes idle connections after 8 > hours. > --> > <parameter> > <name>url</name> > > <value>jdbc:mysql://localhost:3306/fyptest?autoReconnect=true</value> > </parameter> > </ResourceParams> > </Context> > > web.xml file: > > <resource-ref> > <description>DB Connection</description> > <res-ref-name>jdbc/TestDB</res-ref-name> > <res-type>javax.sql.DataSource</res-type> > <res-auth>Container</res-auth> > </resource-ref> > > This electronic message transmission contains information from the Company that may be proprietary, confidential and/or privileged. The information is intended only for the use of the individual(s) or entity named above. If you are not the intended recipient, be aware that any disclosure, copying or distribution or use of the contents of this information is prohibited. If you have received this electronic transmission in error, please notify the sender immediately by replying to the address listed in the "From:" field. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
