I do have mysql-connector-java-2.0.14-bin.jar in the common/lib directory. Shouldn't it find the correct class being there?
On Sunday 22 September 2002 10:39 pm, Kwok Peng Tuck wrote: > Are you actually using the mysql driver? Cause if it says loading driver > null, means there isn't one. > > John Walstra wrote: > >I'm trying to set up a JNDI connection to MySQL. I'm using the binary > > release of 4.1.11 with 4.0.4's jasper-compiler.jar and > > jasper-runtime.jar. I'm also using mysql-connector-java-2.0.14. > > > >It's very similar to this thread > >http://www.mail-archive.com/[email protected]/msg64346.html , > >however I still can't get mine working after reading that thread. I've > >basically followed (cut and paste) the JNDI Datasource HOWTO, > >http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-h > >owto.html . > > > >Here is the Context section of my server.xml > > > > <Context path="/jkw" > > docBase="/usr/local/web/meta-htdocs/JWALSTRA/htdocs/jsp" > > debug="5" useNaming="true" > > reloadable="true" crossContext="true"> > > > > <Logger className="org.apache.catalina.logger.FileLogger" > > prefix="jkw_log." suffix=".txt" > > timestamp="true"/> > > > > <Resource name="jdbc/JKW" > > auth="Container" > > type="javax.sql.DataSource"/> > > > > <ResourceParams name="jdbc/JKW"> > > <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 0 for no limit. > > --> > > <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>nobody</value> > > </parameter> > > <parameter> > > <name>password</name> > > <value></value> > > </parameter> > > > > <!-- Class name for mm.mysql JDBC 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/jkw?autoReconnect=true</value> > > </parameter> > > </ResourceParams> > > </Context> > > > >Here is my web.xml > > > ><?xml version="1.0" encoding="ISO-8859-1"?> > > > ><!DOCTYPE web-app > > PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" > > "http://java.sun.com/dtd/web-app_2_3.dtd";> > > > ><web-app> > > > > <taglib> > > <taglib-uri> > > /orataglib > > </taglib-uri> > > <taglib-location> > > /WEB-INF/tlds/orataglib_1_0_3.tld > > </taglib-location> > > </taglib> > > > > <taglib> > > <taglib-uri> > > /jkw > > </taglib-uri> > > <taglib-location> > > /WEB-INF/tlds/jkw-1.0.tld > > </taglib-location> > > </taglib> > > > > <resource-ref> > > <description>MySQL DB Connection</description> > > <res-ref-name>jdbc/JKW</res-ref-name> > > <res-type>javax.sql.DataSource</res-type> > > <res-auth>Container</res-auth> > > </resource-ref> > > > ></web-app> > > > >My common/lib directory ... (jasper* is from 4.0.4) > > > >-rw-r--r-- 1 root root 45386 Sep 19 08:30 activation.jar > >-rw-r--r-- 1 root root 716139 Sep 19 08:30 ant.jar > >-rw-r--r-- 1 root root 90503 Sep 19 08:30 > >commons-collections.jar > >-rw-r--r-- 1 root root 62998 Sep 19 08:30 commons-dbcp.jar > >-rw-r--r-- 1 root root 16910 Sep 19 08:30 > >commons-logging-api.jar > >-rw-r--r-- 1 root root 28930 Sep 19 08:30 commons-pool.jar > >-rw-r--r-- 1 root root 210191 Sep 22 21:40 > > jasper-compiler.jar -rw-r--r-- 1 root root 67077 Sep 22 > > 21:40 jasper-runtime.jar -rw-r--r-- 1 root root 84854 Sep > > 19 08:30 jdbc2_0-stdext.jar -rw-r--r-- 1 root root 98496 > > Sep 19 08:30 jndi.jar > >-rw-r--r-- 1 root root 8674 Sep 19 08:30 jta.jar > >-rw-r--r-- 1 root root 280984 Sep 19 08:30 mail.jar > >-rw-r--r-- 1 root root 125961 Sep 22 21:27 > >mysql-connector-java-2.0.14-bin.jar > >-rw-r--r-- 1 root root 28664 Sep 19 08:30 naming-common.jar > >-rw-r--r-- 1 root root 18222 Sep 19 08:30 naming-factory.jar > >-rw-r--r-- 1 root root 37601 Sep 19 08:30 > > naming-resources.jar -rw-r--r-- 1 root root 80054 Sep 19 > > 08:30 servlet.jar > > > >Here is my code sniplet ... > > > > Connection conn = null; > > Statement stmt = null; > > ResultSet rset = null; > > > > Context ctx = new InitialContext(); > > if(ctx == null ) > > { > > throw new Exception("Boom - No Context"); > > } > > > > DataSource ds = (DataSource)ctx.lookup( "java:comp/env/jdbc/JKW"); > > > > try > > { > > conn = ds.getConnection(); > > stmt = conn.createStatement(); > > > >And the error message ... > > > >java.sql.SQLException: Cannot load JDBC driver class 'null' > > at > >org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.j > >ava:529) at > >org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java > >:312) at jkw.jsp.beans.SkillTypeBean.setTypeId(SkillTypeBean.java:42) at > > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at > >sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: > >39) at > >sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm > >pl.java:25) > > > > > >Any ideas? > > > >Thanks, > >John -- John Walstra 1002 North Stanford Street Port Washington, WI 53074 H: (262) 284-2395 C: (847) 858-2395 [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] It is so stupid of modern civilisation to have given up believing in the devil when he is the only explanation of it. -- Ronald Knox, "Let Dons Delight" -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
