evolutionnext

I usually use Jboss and Tomcat combination. Once in a while I have to use Tomcat only, this is one of those times. This exception has been occuring since 2004 it looks like. But, since I rarely use Tomcat I am reporting it today. :)

I was trying to set up a JDBC DataSource using JNDI on tomcat and I receieved this SQLNestedException. I decided to log the error and let you in on the possible fix. The big thing to note is that now you no longer have resource-params like you used to. You now have to set up your JNDI resources by attribute only. In other words, database resources have gone from:

This:

<Context ...>
  ...
  <Resource name="jdbc/EmployeeDB" auth="Container"
            type="javax.sql.DataSource"/>
  <ResourceParams name="jdbc/EmployeeDB">
    <parameter>
      <name>username</name>
      <value>dbusername</value>
    </parameter>
    <parameter>
      <name>password</name>
      <value>dbpassword</value>
    </parameter>
    <parameter>
      <name>driverClassName</name>
      <value>org.hsql.jdbcDriver</value>
    </parameter>
    <parameter>
      <name>url</name>
      <value>jdbc:HypersonicSQL:database</value>
    </parameter>
    <parameter>
      <name>maxActive</name>
      <value>8</value>
    </parameter>
    <parameter>
      <name>maxIdle</name>
      <value>4</value>
    </parameter>
  </ResourceParams>
  ...
</Context>

To This:

<Context ...>
  ...
  <Resource name="jdbc/EmployeeDB" auth="Container"
            type="javax.sql.DataSource" username="dbusername" password="dbpassword"
            driverClassName="org.hsql.jdbcDriver" url="jdbc:HypersonicSQL:database"
            maxActive="8" maxIdle="4"/>
  ...
</Context>

Here is the stack trace that you may similarily have seen

org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
        at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:780)
        at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:388)
        at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:283)
        at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
        at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
        at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453)
        at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
        at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: No suitable driver
        at java.sql.DriverManager.getDriver(DriverManager.java:243)
        at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:773)
        ... 36 more