Mark Witczak wrote: > I'm very new to Tomcat, connection pooling, JSP, etc. and I've been > banging my head against a wall for two weeks trying to get a simple > program to connect to a MySQL database. > > *Vital Stats:* > Ubuntu 9.10, Java 1.6.0_0, Java Servelet 2.5, Java Server Pages 2.1, > JSTL 1.2, Apache2, Tomcat 6.0.20, MySQL 5.1.41 & 5.0.67 > MySQL Connector/J 5.1.11 (also 5.1.10) - in $CATALINA_HOME/lib > dbcp 1.2.1 - in $CATALINA_HOME/lib > (all standard Ubuntu issue) > > *testapp/WEB-INF/web.xml:* > <?xml version="1.0" encoding="ISO-8859-1"?> > <web-app xmlns="http://java.sun.com/xml/ns/javaee"; > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > xsi:schemaLocation="http://java.sun.com/xml/ns/javaee > http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; > version="2.5"> > > <description> > Servlet and JSP Examples. > </description> > <display-name>Servlet and JSP Examples</display-name> > > <resource-ref> > <description>DB Connection</description> > <res-ref-name>jdbc/mydatabase</res-ref-name> > <res-type>javax.sql.DataSource</res-type> > <res-auth>Container</res-auth> > </resource-ref> > </web-app> > > *testapp/META-INF/context.xml:* > <?xml version="1.0" encoding="UTF-8"?> > > <Context path="/junk" docBase="junk" > debug="5" reloadable="true" crossContext="true"> > > <Resource name="jdbc/mydatabase" auth="Container" > type="javax.sql.DataSource" > maxActive="100" maxIdle="30" maxWait="10000" > username="foo" password="bar" > driverClassName="com.mysql.jdbc.Driver" > url="jdbc:mysql://test.hostname.com:3306/database_test1"/> > </Context> > > *testapp/testapp.jsp:* > <%@ page contentType="text/html" %> > <%-- These libraries are required for the <c> and <sql> tags --%> > <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"; %> > <%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"; %> > <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> > <html> > <head> > <title>JNDI DBCP Test Page</title> > </head> > <body> > > <h1>JNDI DBCP Test Page</h1> > <br/>Executing the query ... > <br/> > > <%-- Note: Enter a query that is valid for your database here --%> > <sql:query var="result" dataSource="jdbc/mydatabase"> > SELECT company FROM manuals > </sql:query> > </body> > </html> > > I create the WAR (jar cvf testapp.war *), undeploy the old version and > redeploy the new one through Tomcat Web Application Manager. Then > restart Tomcat (sudo /etc/init.d/tomcat restart). The result is: > > Jan 21, 2010 9:40:35 PM org.apache.catalina.core.ApplicationContext log > INFO: ContextListener: contextInitialized() > Jan 21, 2010 9:40:35 PM org.apache.catalina.core.ApplicationContext log > INFO: SessionListener: contextInitialized() > Jan 21, 2010 9:43:06 PM org.apache.catalina.core.StandardWrapperValve > invoke > SEVERE: Servlet.service() for servlet jsp threw exception > javax.servlet.jsp.JspException: Unable to get connection, DataSource > invalid: "org.apache.commons.dbcp.SQLNestedException: Cannot create > PoolableConnectionFactory (Communications link failure > > The last packet sent successfully to the server was 0 milliseconds > ago. The driver has not received any packets from the server.)" > at > org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(Unknown > Source) > at > org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(Unknown > Source) > at > org.apache.jsp.test_jsp._jspx_meth_sql_005fquery_005f0(test_jsp.java:188) > at org.apache.jsp.test_jsp._jspService(test_jsp.java:138) > at > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > Blah, Blah, Blah.... > > *More info: *The connection to MySQL tested successfully using the > command line 'mysql'. There are no firewalls, that I can find, between > the servers. > > What is going on here? What am I missing? What is going on here? How > do I fix it? > > -Do I need to create a "foo" user in the tomcat-users.xml? > -Do I have to mess with the policy files? or security? > > Thanks for your help. > Mark > > > What options did you use with the mysql command to test MySQL? Be careful as the command line will use unix sockets instead of tcp/ip by default. The JDBC driver won't be able to do that.
--David --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
