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Posted to users@tomcat.apache.org by Ivan Jouikov <iv...@comcast.net> on 2004/07/12 06:27:49 UTC
org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
When they compiled the latest “stable” Tomcat, did they bother to test it before putting it out?
I looke through the entire google, and through this entire list, and I found lots of people having this problem. Yet, I didn’t find any solutions (that worked for me that is).
Basically, here’s what I have:
I’m running Tomcat 5.0.27 on Java 1.5 beta 2; I am using MySQL 4.1.2
Inside /common/lib/ I have mysql-connector.jar which is 3.0.14 – production version.
Inside my server.xml I have (relevant stuff):
<Host appBase="/home/resk/web" name="resk" autoDeploy="true" unpackWARs="true" liveDeploy="true">
</Host>
Inside my /conf/Catalina/resk I have resk.xml:
<?xml version='1.0' encoding='utf-8'?>
<Context debug="5" displayName="RESK" docBase="ROOT" // BY THE WAY I also tried /home/resk/web/ROOT
path="/" reloadable="false">
<Environment name="data.source.name" type="java.lang.String" value="java:comp/env/jdbc/RESK"/> // BTW I tried without this line
<Resource auth="Container" name="jdbc/RESK"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/RESK">
<parameter>
<name>url</name>
<value>jdbc:mysql://127.0.0.1:3306/resk?autoReconnect=true</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>2</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>10</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>
<parameter>
<name>removeAbandoned</name>
<value>true</value>
</parameter>
<parameter>
<name>username</name>
<value>resk</value>
</parameter>
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>removeAbandonedTimeout</name>
<value>60</value>
</parameter>
<parameter>
<name>password</name>
<value>RESK</value>
</parameter>
</ResourceParams>
</Context>
Inside my /home/resk/web/ROOT/WEB-INF/ I have web.xml (relevant stuff):
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/RESK</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<!-- Used for startup primarly. Kepping things in one place. -->
<env-entry>
<env-entry-name>data.source.name</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>java:comp/env/jdbc/RESK</env-entry-value>
</env-entry>
Now, here’s how I load the data source (relevant part of the class):
public class Manager
{
DataSource ds;
static Manager instance;
private Manager()
{
try
{
// This is all the web.xml properties
InitialContext context = new InitialContext();
dbDataSource = (String)context.lookup("java:comp/env/data.source.name");
ds = (DataSource) new InitialContext().lookup(dbDataSource);
}
catch ( NamingException e )
{
Logger.getLogger("problem").fatal("Unable to load database data source!",e);
ds = null; // This will throw enough exceptions to notice the problem :)
}
}
/**
* @return instance of the Manager.
*/
public static Manager getInstance()
{
if (instance == null) instance = new Manager();
return instance;
}
/**
* @return Connection from the pool. Make sure to close it when done.
*/
public synchronized Connection getConnection() throws SQLException
{
return ds.getConnection();
}
…
}
Now, interesting thing to note. If I look at my catalina_log.2004-07-11.txt, I will find the following:
2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Resource parameters for jdbc/RESK = ResourceParams[name=jdbc/RESK, parameters={url=jdbc:mysql://127.0.0.1:3306/resk?autoReconnect=true, maxIdle=2, maxActive=10, driverClassName=com.mysql.jdbc.Driver, maxWait=10000, removeAbandoned=true, username=resk, factory=org.apache.commons.dbcp.BasicDataSourceFactory, removeAbandonedTimeout=60, password=RESK}]
2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Adding resource ref jdbc/RESK
2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: ResourceRef[className=javax.sql.DataSource,factoryClassLocation=null,factoryClassName=org.apache.naming.factory.ResourceFactory,{type=scope,content=Shareable},{type=auth,content=Container},{type=url,content=jdbc:mysql://127.0.0.1:3306/resk?autoReconnect=true},{type=maxIdle,content=2},{type=maxActive,content=10},{type=driverClassName,content=com.mysql.jdbc.Driver},{type=maxWait,content=10000},{type=removeAbandoned,content=true},{type=username,content=resk},{type=factory,content=org.apache.commons.dbcp.BasicDataSourceFactory},{type=removeAbandonedTimeout,content=60},{type=password,content=RESK}]
2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Adding environment entry data.source.name
2004-07-11 20:47:47 NamingContextListener[/Catalina/resk/]: Resource parameters for UserTransaction = null
Looking through this stuff it’s obvious that my resource IS found, and that it IS loaded. Yet, somehow, My application does not see it…
Anybody knows why? Any help will be greatly appreciated…
_____
Best Regards,
Ivan V. Jouikov
(206) 228-6670
HYPERLINK "http://www.ablogic.net/"
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