Cannot create JDBC driver

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Cannot create JDBC driver

Cannot create JDBC driver

2007-01-16 - By Ray Madigan

Back

Reply: 1 2 3 4 5 6

I have beat my head against this one long enough. I am hoping someone can
help.

I cant get past the error message
SQLException: Cannot create JDBC driver of class ' ' for connect url 'null'

I am using tomcat 5.5.17 and I am attempting to get a JDBC connection in a
servlet using the instructions in the tomcat documentation pages.

My configuration is as follows:

$CATALINA_HOME/conf/server.xml - No changes

$CATALINA_BASE/webapps/Library/WEB-INF/web.xml
<resource-ref>
<res-ref-name>jdbc/library</res-ref-name>
<res-type>javax.sql.DataSource

</res-type>
<res-auth>Container</res-auth>
</resource-ref>

Between the <welcome... tag and the <taglib tag

$CATALINA_BASE/webapps/Library/META-INF/context.xml
<Context path="/Library" docBase="Library"
crossContext="true" reloadable="true" debug="1">

<Resource name="jdbc/library"
auth="Container"
type="javax.sql.DataSource

"
driverClassName="org.postgresql.Driver

"
url="jdbc:postgresql://192.xxx.xxx.xx/library"
username="..."
password="...."/>
</Context>

Note: I was under the impression that Tomcat copied this to the
$CATALINA_HOME/conf/Catalina/localhost/Library.xml but it isn't being
copied?

The postgresql JDBC driver and commons-{pool,jdbc,collection}.jar are in
$CATALINA_HOME/common/lib

My servlet source is straight forward

Context initContext = new InitialContext();
Context envContext = (Context)initContext.lookup("java:comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/library");

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