Null connection when trying to connect to SQL Server 2000 in Tomcat4.1.29

Question

Hi All,
I am still struggling with null connection when trying to connect to sql server 2000 with tomcat using sun.jdbc.odbc.JdbcOdbcDriver
Here is my server.xml
<Server port="8005" shutdown="SHUTDOWN" debug="0">
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
debug="0"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
debug="0"/>
<GlobalNamingResources>
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved">
</Resource>
<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
</parameter>
<parameter>
<name>pathname</name>
<value>conf/tomcat-users.xml</value>
</parameter>
</ResourceParams>
<Resource auth="Container" description="Users and Groups
Database" name="UserDatabase"
scope="Shareable"
type="org.apache.catalina.UserDatabase"/>
<Resource name="jdbc/DefaultDS" scope="Shareable"
type="javax.sql.DataSource"/>
<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.
MemoryUserDatabaseFactory</value>
</parameter>
<parameter>
<name>pathname</name>
<value>conf/tomcat-users.xml</value>
</parameter>
</ResourceParams>
<ResourceParams name="jdbc/DefaultDS">
<parameter>
<name>validationQuery</name>
<value></value>
</parameter>
<parameter>
<name>user</name>
<value>sa</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>5000</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>4</value>
</parameter>
<parameter>
<name>password</name>
<value>sa</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:odbc:JBoss-SQL://localhost:1433;databaseName=Development;selectMethod=cursor;</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>sun.jdbc.odbc.JdbcOdbcDriver</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>2</value>
</parameter>
</ResourceParams>
</GlobalNamingResources>
<!-- Define the Tomcat Stand-Alone Service -->
<Service name="Tomcat-Standalone">
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8080" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="100" debug="0" connectionTimeout="20000"
useURIValidationHack="false" disableUploadTimeout="true" />
<!-- Note : To disable connection timeouts, set connectionTimeout value
to -1 -->
<!-- Define a SSL Coyote HTTP/1.1 Connector on port 8443 -->
<!--
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8443" minProcessors="5" maxProcessors="75"
enableLookups="true"
acceptCount="100" debug="0" scheme="https" secure="true"
useURIValidationHack="false" disableUploadTimeout="true">
<Factory className="org.apache.coyote.tomcat4.CoyoteServerSocketFactory"
clientAuth="false" protocol="TLS" />
</Connector>
-->
<!-- Define a Coyote/JK2 AJP 1.3 Connector on port 8009 -->
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8009" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="10" debug="0" connectionTimeout="0"
useURIValidationHack="false"
protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>
<!-- Define an AJP 1.3 Connector on port 8009 --><Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"
timestamp="true"/>
<!-- Define the default virtual host -->
<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"
timestamp="true"/>
<Environment name="maxExemptions" type="java.lang.Integer"
value="15"/>
<Parameter name="context.param.name" value="context.param.value"
override="false"/>
<Resource name="jdbc/DefaultDS" auth="container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/DefaultDS">
<!-- Maximum number of dB connections in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxActive</name>
<value>8</value>
</parameter>
<!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxIdle</name>
<value>4</value>
</parameter>
<!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
-->
<parameter>
<name>maxWait</name>
<value>5000</value>
</parameter>
<!-- MS Sql Server dB username and password for dB connections
-->
<parameter>
<name>user</name>
<value>sa</value>
</parameter>
<parameter>
<name>password</name>
<value>sa</value>
</parameter>
<!-- Class name for MS Sql Server JDBC driver
-->
<parameter>
<name>driverClassName</name>
<value>sun.jdbc.odbc.JdbcOdbcDriver</value>
</parameter>
<!-- The JDBC connection url for connecting to MS Sql Server dB.
-->
<parameter>
<name>url</name>
<value>jdbc:odbc:JBoss-SQL://localhost:1433;databaseName=Development;selectMethod=cursor;</value>
</parameter>
<!-- This Databae Connection Pool Description.
-->
<parameter>
<name>description</name>
<value>JDBC Driver: sun.jdbc.odbc.JdbcOdbcDriver</value>
</parameter>
</ResourceParams>
<Resource name="mail/Session" auth="Container"
type="javax.mail.Session"/>
<ResourceParams name="mail/Session">
<parameter>
<name>mail.smtp.host</name>
<value>localhost</value>
</parameter>
</ResourceParams>
<ResourceLink name="linkToGlobalResource"
global="simpleValue"
type="java.lang.Integer"/>
</Host>
</Engine>
</Service>
</Server>
and my web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<!-- Standard Action Servlet Mapping -->
<web-app>
<resource-ref>
<res-ref-name>jdbc/DefaultDS</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
and JBoss-SQL is data source I created from control panel settings and here is way I am retrieving connetion
InitialContext initCtx = new InitialContext();
DataSource ds = (DataSource) initCtx.lookup("java:comp/env/jdbc/DefaultDS");
Connection con = ds.getConnection();
return con;
I tried connecting as mentioned in this website
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html#Common%20Problems.But didn't help
Please help urgent
Sorry for long file. Can any one please help me in solving this problem.
Thanks in advnace
Kurakula

Answer 1

I'd recommend that you not use the JDBC-ODBC bridge driver to connect to SQL Server. M$ and jTDS are two free type IV JDBC drivers that you should use instead. Put those JARs in the WEB-INF/lib directory.
The database URL you're using is not correct if you change drivers. Consult the docs to find out what the proper syntax is.
MOD