错误tomcat-jdbc.jar在tomcat6中启动应用程序

Question

im trying to deploy a web-app in tomcat6 with Mysql connection, i manually uploaded a tomcat-jdbc file v1.1.0.1 into tomcat/lib/ but the app will not start,

copied the last lines of the log file here:

Mar 2, 2013 11:10:06 AM org.apache.catalina.core.StandardContext start
SEVERE: Context [] startup failed due to previous errors
Mar 2, 2013 11:15:36 AM org.apache.naming.NamingContext lookup
WARNING: Unexpected exception resolving reference
java.sql.SQLException: com.mysql.jdbc.Driver
        at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:243)
        at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:176)
        at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:653)
        at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:595)
        at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:458)
        at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:130)
        at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:99)
        at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:499)
        at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:222)
        at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:140)
        at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:793)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:140)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:781)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
        at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1028)
        at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:637)
        at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:238)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4612)
        at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1276)
        at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:625)
        at org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java:136)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:194)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:236)
        ... 40 more
Mar 2, 2013 11:15:36 AM org.apache.catalina.core.NamingContextListener
addResource
WARNING: Failed to register in JMX: javax.naming.NamingException:
com.mysql.jdbc.Driver
Mar 2, 2013 11:15:36 AM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
Mar 2, 2013 11:15:36 AM org.apache.catalina.core.StandardContext start
SEVERE: Context [] startup failed due to previous errors

====

this is my contex.xml file

<Resource name="jdbc/AmbraDS"
    auth="Container"
    type="javax.sql.DataSource"
    factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
    validationQuery="SELECT 1"
    testOnBorrow="true"
    driverClassName="com.mysql.jdbc.Driver"
    username="test"
    password="test"
    url="jdbc:mysql://localhost:3306/test"/>

and the jar file which is used is:

 apache-tomcat-jdbc-1.1.0.1-src

it seems there is a problem connecting with MySQL can anybody help me through this?

Answer 1

Download the jdbc driver from http://dev.mysql.com/downloads/connector/j/

It needs to be in catalinahome/lib

Answer 2

I think some conflict is there. For example if you have 2 locations and one has JDBC drivers and the other one not then if your classloader loads from the 1st location and some class from the 1st location wants to use the driver - the driver is not there. So look for the duplicate JARs that are using your driver