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From shawn <javajun...@koyuru.com>
Subject Re: java.sql.SQLException: Cannot load JDBC driver class 'null'
Date Thu, 02 Jan 2003 04:57:42 GMT
Try changing this value 
<ResourceParams name="jdbc/TestDB">

Shouldn't it be jdbc/InfectedDB ?

That's my guess.

Shawn

On Thu, 2003-01-02 at 12:29, Anastasios Angelidis wrote:
> Hi I downloaded the MySQL Connector/J 2.0.14 JDBC drivers and I copied 
> the mysql-connector-java-2.0.14-bin.jar to the common/lib folder...
> 
> Here is my server.xml <context> config...
> 
> <Context path="/infected" docBase="infected" debug="5" reloadable="true" 
> crossContext="true">
>     <Logger className="org.apache.catalina.logger.FileLogger" 
> prefix="localhost_infected_log." suffix=".txt" timestamp="true"/>
>     <Resource name="jdbc/InfectedDB" auth="Container" 
> type="javax.sql.DataSource"/>
>     <ResourceParams name="jdbc/TestDB">
>         
> <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>30</value></parameter>
>         <parameter><name>maxWait</name><value>10000</value></parameter>
>         <parameter><name>username</name><value>xxxxxx</value></parameter>
>         <parameter><name>password</name><value>xxxxxx</value></parameter>
>         
> <parameter><name>driverClassName</name><value>com.mysql.jdbc.Driver</value></parameter>
>         
> <parameter><name>url</name><value>jdbc:mysql://localhost:3306/infected</value></parameter>
>     </ResourceParams>
> </Context>
> 
> Here is my web.xml...
> 
> <web-app>
>     <display-name>infected rhythms</display-name>
>       <description>infected rhythms web site</description>
>       <resource-ref>
>         <description>DB Connection</description>
>         <res-ref-name>jdbc/InfectedDB</res-ref-name>
>         <res-type>javax.sql.DataSource</res-type>
>         <res-auth>Container</res-auth>
>     </resource-ref>
> </web-app>
> 
> 
> Then I worte this simple JSP code...
> 
> try
> {
>     Context ctx = new InitialContext();
> 
>     DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/InfectedDB");
> 
>     Connection conn = ds.getConnection();
> 
>     The rest of the code...
> }
> catch(Exception ex)
> {
>     ex.printStackTrace();
> }
> 
> The exception os caught whne trying to get the connection Connection 
> conn = ds.getConnection(); Any ideas? Thanks
> The stack trace...
> 
> java.sql.SQLException: Cannot load JDBC driver class 'null'
>         at 
> org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:529)
>         at 
> org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
>         at org.apache.jsp.artists_jsp._jspService(artists_jsp.java:57)
>         at 
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>         at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
>         at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
>         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>         at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
>         at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
>         at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>         at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
>         at 
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> 
>         at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>         at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
>         at 
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> 
>         at 
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
>         at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>         at 
> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>         at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>         at 
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>         at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
>         at 
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> 
>         at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
>         at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>         at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
>         at 
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> 
>         at 
> org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
>         at 
> org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
>         at java.lang.Thread.run(Thread.java:536)
> 
> 
> --
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-- 
shawn <javajunkie@koyuru.com>


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