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From Manolo Ramirez <man...@seafbo.com>
Subject Re: javax.naming.NamingException: Cannot create resource instance
Date Tue, 25 Jun 2002 15:20:37 GMT
I got the same problem with PostgreSQL, it was because the RPM of Tomcat 4.0.3 
does not support Tyrex, I had to compile the source RPM and install all the 
requirements to work.

To verify try loading this Classes:

import tyrex.jdbc.ServerDataSource;
import tyrex.jdbc.xa.EnabledDataSource;

if don't load you must to recompile Tomcat.


-- 
Manolo G. Ramirez T.
Serinbol S.A.

On Mar 25 Jun 2002 00:42, Vikramjit Singh wrote:
> hi,
>
> I am using tomcat 4.0.3 and the same problem i am facing though i am using
> Oracle driver i.e. classes12.zip. I have tried the code in the url you
> specified and i am also using tomcat 4.0.3 and jdk1.4.
>
> I get the error
>
> javax.naming.NamingException: Cannot create resource instance
> 	at
> org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory
>. java:167
>
> here is what i have written in server.xml.
>
>
> 		<Resource name="jdbc/ora" auth="Container"
> type="javax.sql.DataSource"/>
> 		<ResourceParams name="jdbc/ora">
> 		<parameter>
> 			<name>factory</name>
>
> <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
> 	      </parameter>
> 		<parameter>
> 		<name>username</name>
> 		<value>scott</value>
> 		</parameter>
> 		<parameter>
> 		<name>password</name>
> 		<value>tiger</value>
> 		</parameter>
> 		<parameter>
> 		<name>driverClassName</name>
> 		<value>oracle.jdbc.driver.OracleDriver</value>
> 		</parameter>
> 	        <parameter>
> 			<name>driverName</name>
> 			<value>jdbc:oracle:thin:@eou3:1521:incub</value>
> 		</parameter>
> 		<parameter>
> 			<name>url</name>
> 			<value>jdbc:oracle:thin:@eou3:1521:incub</value>
> 		</parameter>
> 		</ResourceParams>
>
> Is the driverName correct. If someone is using classes12.zip could someone
> tell whats the correct settings, if mine is wrong.
> in web.xml have written as told.
>
> the jsp has this
>
> <%
> try {
> 	Context ctx = new InitialContext();
> 	if(ctx == null )
> 		throw new Exception("Boom - No Context");
>
> 	DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/ora");
> 	if (ds != null) {
> 		Connection conn = ds.getConnection();
>
>         if(conn != null)  {
> 			String foo = "Got Connection "+conn.toString();
>             Statement stmt = conn.createStatement();
>             ResultSet rst = stmt.executeQuery("select empno, ename from
> emp");
> 			if(rst.next()) {
> 				foo=rst.getString(2);
> 			}
>             conn.close();
> 		}
> 	}
> }
> catch (SQLException E) {
> 	out.println("<br>unable to get connection on ora !");
> 	out.println("<br>SQLException: " + E.getMessage());
> 	out.println("<br>SQLState: " + E.getSQLState());
> 	out.println("<br>VendorError: " + E.getErrorCode());
> }
> %>
>
> Regards,
> Vikramjit Singh,
> Systems Engineer,
> GTL Ltd.
> Ph. 7612929-1031
>
>
> -----Original Message-----
> From: Jacob Kjome [mailto:hoju@visi.com]
> Sent: Monday, June 24, 2002 8:04 AM
> To: Tomcat Users List
> Subject: Re: javax.naming.NamingException: Cannot create resource
> instance
>
>
> Hello Kumar,
>
> Try using the "username" parameter.
>
> Also, the solution that has worked flawlessly for me is here:
>
> http://marc.theaimsgroup.com/?l=tomcat-user&m=102225547106556&w=2
>
> Note that this is with the new 4.1.x versions of Tomcat.  If you are
> using 4.0.x versions, your mileage may vary.
>
> Jake
>
> Monday, June 24, 2002, 10:00:38 AM, you wrote:
>
> K> Hi,
> K>    Can anyone help me how to configure JDBC DataSource using IBM DB2 as
> the
> K> database.I had gone through the solution "Generic DataSource Resource
> K> Factory Available. JDBC Data Sources." posted by Mr.Anthony Dodd.But
> there
> K> the solution was explained using Oracle database.Has anyone tried
> K> configuring a DataSource using DB2?
>
> K> I'm using IBM DB2  7.1 (Driver - COM.ibm.db2.jdbc.app.DB2Driver)
> K> Tomcat 4.0.2
>
> K> Here are the snippets for server.xml,web.xml and the JVM stack trace:
>
> K> server.xml:
>
> K>     <Context path="/test" docBase="test" debug="0" reloadable="true">
> K>   <Resource name="jdbc/myDS" type="COM.ibm.db2.jdbc.DB2DataSource"
> K> reloadable="true" auth="Container"/>
> K>   <ResourceParams name="jdbc/myDS">
> K>    <parameter>
> K>     <name>factory</name>
> K>     <value>org.apache.naming.factory.DataSourceFactory</value>
> K>    </parameter>
> K>    <Parameter>
> K>     <name>user</name>
> K>     <value>db2admin</value>
> K>    </Parameter>
> K>    <Parameter>
> K>     <name>password</name>
> K>     <value>db2admin</value>
> K>    </Parameter>
> K>    <Parameter>
> K>     <name>driverClassName</name>
> K>     <value>COM.ibm.db2.jdbc.app.DB2Driver</value>
> K>    </Parameter>
> K>    <Parameter>
> K>     <name>driverName</name>
> K>     <value>jdbc:db2:sample</value>
> K>    </Parameter>
> K>   </ResourceParams>
>
> K>   <Realm  className="org.apache.catalina.realm.JDBCRealm"
> K>      connectionName="db2admin"
> K>      connectionPassword="db2admin"
> K>      connectionURL="jdbc:db2:sample"
> K>      digest="SHA"
> K>      driverName="COM.ibm.db2.jdbc.app.DB2Driver"
> K>      roleNameCol="role_name"
> K>      userCredCol="password"
> K>      userNameCol="user_name"
> K>      userRoleTable="user_roles"
> K>      userTable="users" />
> K>  </Context>
>
> K> web.xml:
>
> K>  <resource-ref>
> K>   <description>DS resource factory</description>
> K>   <res-ref-name>jdbc/myDS</res-ref-name>
> K>   <res-type>COM.ibm.db2.jdbc.DB2DataSource</res-type>
> K>   <res-auth>Container</res-auth>
> K>  </resource-ref>
>
> K> I get the following error when i try to lookup the datasource in my JSP:
> K> ctx (java:comp/env) = org.apache.naming.NamingContext@42a80d
> K> obj = myDS: org.apache.naming.ResourceRef
> K> Error processing the request (doGet)  : Cannot create resource instance
> K> javax.naming.NamingException: Cannot create resource instance
> K>         at
> org.apache.naming.NamingContext.lookup(NamingContext.java:837) K>        
> at org.apache.naming.NamingContext.lookup(NamingContext.java:181) K>       
>  at org.apache.naming.NamingContext.lookup(NamingContext.java:822) K>      
>   at org.apache.naming.NamingContext.lookup(NamingContext.java:194) K>     
>    at CheckDBServlet.doGet(CheckDBServlet.java:40)
> K>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:1125)
> K>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:1264)
> K>         at
> K>
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applicatio
>n K> FilterChain.java:247)
> K>         at
> K>
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterC
>h K> ain.java:193)
> K>         at
> K>
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.j
>a K> va:243)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 66)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> K>         at
> K> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> K>         at
> K>
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.j
>a K> va:215)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 66)
> K>         at
> K>
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBas
>e K> .java:472)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 64)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> K>         at
> K> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> K>         at
> K>
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2366)
> K>         at
> K>
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:16
>4 K> )
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 66)
> K>         at
> K>
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 64)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> K>         at
> K> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> K>         at
> K>
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.jav
>a K> :163)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:
>5 K> 66)
> K>         at
> K>
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> K>         at
> K> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> K>         at
> K>
> org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java
>: K> 1005)
> K>         at
> K>
> org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:109
>8 K> )
> K>         at java.lang.Thread.run(Thread.java:484)
>
> K> Thanks,
> K> Srinivas Kumar
>
>
> K> --
> K> To unsubscribe, e-mail:
> <mailto:tomcat-user-unsubscribe@jakarta.apache.org>
> K> For additional commands, e-mail:
> <mailto:tomcat-user-help@jakarta.apache.org>


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