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POTomcat6 ignores web-inf/lib
 

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    <p><strong>Brief:</strong> Tomcat6 can't recognize my ojdbc14.jar in WebRoot/WEB-INF/lib. I suppose I don't need to configure anything, just putting the .jar file in there and it should work.</p> <p><strong>Details:</strong></p> <p>I've created a web application and put ojdbc14.jar in WEB-INF/lib folder. When I start Tomcat6 and <strong>access an index.jsp page which creates an object that initiates a connection to my oracle database</strong>, an error occurs saying "Cannot load JDBC driver class 'oracle.jdbc.OracleDriver'". Apparently <strong>Tomcat6 can't recognize the 'oracle.jdbc.OracleDriver' class in web-inf/lib/ojdbc14.jar</strong>.</p> <p>I've done some research and speculate the following reasons:</p> <ol> <li>Tomcat6 has got some different ways of loading classes. They change it in every version released. Or</li> <li>There is a bug with Tomcat6. I found a similar bug in Tomcat3 (see here <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=249044" rel="nofollow">https://bugs.eclipse.org/bugs/show_bug.cgi?id=249044</a>). But I doubt this bug could last for so many versions. </li> <li>Tomcat6 has included ojdbc14.jar's content in its own lib file already, and there's a conflict by adding it to web-inf/lib once more. I don't believe this, because after deleting ojdbc14.jar from WEB-INF/lib, the problem persists.</li> </ol> <p>Here's my web application structure:</p> <ul> <li>WebRoot <ul> <li>WEB-INF <ul> <li>classes <ul> <li>'A class for initiating a connection'</li> </ul></li> <li>lib <ul> <li>ojdbc14.jar</li> </ul></li> </ul></li> <li>index.jsp</li> </ul></li> </ul> <hr> <p>The error:</p> <pre><code>org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.OracleDriver' at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:766) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540) at com.demo6.DataSourceExample.getConnection(DataSourceExample.java:18) at org.apache.jsp.index_jsp._jspService(index_jsp.java:63) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:760) ... 21 more </code></pre>
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