Tomcat 5.5 Connection Pooling problem

Question

Hi,
I am trying to setup JDBC connection pooling in Tomcat 5.5 using DB2 database and IBM RAD 7.0 IDE. Although The setup described in JNDI Resources HOW-TO(http://tomcat.apache.org/tomcat-5.5-doc/jndi-resources-howto.html) for creating JDBC Datasources did work, I would like to work with real connection pooling, which means not declaring datasources into the /META-INF/context.xml file of each web app but having them as <GlobalNamingResources> into /conf/server.xml and accessing them through <ResourceLink> references from /conf/context.xml (or /conf/catalina/localhost/ROOT.xml). However I am stuck with Exception javax.naming.NameNotFoundException: Name jdbc is not bound in this Context. Even if I add an: <resource-env-ref>
          <description>
          </description>
          <resource-env-ref-name>jdbc/DB2T</resource-env-ref-name>
          <resource-env-ref-type>javax.sql.DataSource</resource-env-ref-type>
     </resource-env-ref> record in my /WEB-INF/web.xml I get a javax.naming.NamingException: Cannot create resource instance Exception.
Does anyone have an idea how to resolve this?
Here are my configurations:
-----------------/conf/server.xml-------------------
<Server port="8005" shutdown="SHUTDOWN">
  <!-- Global JNDI resources -->
  <GlobalNamingResources>
   <Resource name="jdbc/DB2T" auth="Container"
   type="javax.sql.DataSource" removeAbandoned="true"
  factory="org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory"
   removeAbandonedTimeout="30" maxActive="100"
   maxIdle="30" maxWait="10000" username="id"
   password="pass"
   driverClassName="com.ibm.db2.jcc.DB2Driver"
   url="jdbc:db2://<ip-addrr>:<port>/dbname"/>
  </GlobalNamingResources>------------------/conf/context.xml----------------------
<!-- The contents of this file will be loaded for each web application -->
<Context>
    <!-- Default set of monitored resources -->
    <WatchedResource>WEB-INF/web.xml</WatchedResource>
    <WatchedResource>META-INF/context.xml</WatchedResource>
<ResourceLink name="jdbc/DB2T" global="jdbc/DB2T"  type="javax.sql.DataSource"/>
</Context>I also try to get the resource with java code like this:
DataSource ds;
InitialContext DSCtx = new InitialContext();
ds = (DataSource) DSCtx.lookup("java:/comp/env/jdbc/DB2T"); PS: When I start the tomcat and hit http://localhost:8080 I can't get the default page although every web app I run loads without problems. Do you think this has a relation with the above problem?

Answer 1

hi,
I think your datasource configuration is incorrect
see this http://tomcat.apache.org/tomcat-5.0-doc/config/globalresources.html
and this
http://forum.java.sun.com/thread.jspa?threadID=610046&messageID=3348979
<GlobalNamingResources ...>
  <ResourceParams name="jdbc/EmployeeDB">
    <parameter>
      <name>driverClassName</name>
      <value>org.hsql.jdbcDriver</value>
    </parameter>
    <parameter>
      <name>driverName</name>
      </value>jdbc:HypersonicSQL:database</value>
    </parameter>
    <parameter>
      <name>user</name>
      <value>dbusername</value>
    </parameter>
    <parameter>
      <name>password</name>
      <value>dbpassword</value>
    </parameter>
  </ResourceParams>
</GlobalNamingResources>be sure that your jdbc driver library (.jar), commons-pool-xx.jar and commons-dbcp-xx.jar are under TOMCAT_DIR/common/lib/
hope that helps