Javax.naming.NamingException: Cannot create resource instance (JOTM )

Question

Hi all,
I wanted to create an application with transaction management, first i tired out tyrex but could get a thing out of it now i am trying out JOTM, but i am getting this error "javax.naming.NamingException: Cannot create resource instance ", below is my configuration..
===context.xml===
<Context path="/FYPMS" docBase="FYPMS" debug="1" reloadable="true" crossContext="true" antiResourceLocking="true">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_crs_log." suffix=".txt"
          timestamp="true"/>
     <Resource name="jdbc/mysql" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="root" password="password" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://127.0.0.1:3306/fypms?autoReconnect=true"/>
<Resource name="UserTransaction" auth="Container"
type="javax.transaction.UserTransaction"/>
<ResourceParams name="UserTransaction">
<parameter>
<name>factory</name>
<value>org.objectweb.jotm.UserTransactionFactory</value>
</parameter>
<parameter>
<name>jotm.timeout</name>
<value>60</value>
</parameter>
</ResourceParams>
</Context>
===web.xml===
<resource-ref>
<res-ref-name>jdbc/mysql</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
===insert.java===
try{
System.out.println("pass0");
Context ctx = new InitialContext();
Context envCtx = (Context)ctx.lookup("java:comp/env");
DataSource datasource = (javax.sql.DataSource)envCtx.lookup("jdbc/mysql");               
UserTransaction ut = (UserTransaction)envCtx.lookup("UserTransaction");
ut.begin();
the dataSource can be retrieve successfully but when i tired to retrieve the UserTransaction i get a "Cannot create resource instance ". Please help mi out with this.. thx
fatmond

Answer 1

we are trying to connect MS Access thru tomcat and it is giving the above exception
i have changed the server.xml
<Resource name="jdbc/Mess" auth="Container" scope="Shareable" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/Mess">
<parameter>
<name>maxWait</name>
<value>5000</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>4</value>
</parameter>
<parameter>
<name>password</name>
<value>admin</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:odbc:Mess</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>sun.jdbc.odbc.JdbcOdbcDriver</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>2</value>
</parameter>
<parameter>
<name>username</name>
<value>admin</value>
</parameter>
</ResourceParams>
web.xml
<resource-ref>
<description>Access Datasource example</description>
<res-ref-name>jdbc/Mess</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
java class
Context initContext = new InitialContext();
DataSource ds = (DataSource)initContext.lookup("java:/comp/env/jdbc/Mess");
con = ds.getConnection();
Please help.......