osuser provider properties declaration

Hi,
 
I've been trying to user a JDBC provider which i've defined in the osuser.xml configuration file. Nevertheless, upon parsing the following error is occurring:
 

SEVERE: Could not create instance of provider
java.lang.RuntimeException: Could not initialize provider com.opensymphony.user.
provider.jdbc.JDBCAccessProvider
        at com.opensymphony.user.util.ConfigLoader.addProvider(ConfigLoader.java
:127)
        at com.opensymphony.user.util.ConfigLoader.access$100(ConfigLoader.java:
37)
        at com.opensymphony.user.util.ConfigLoader$ConfigHandler.endElement(Conf
igLoader.java:154)
        at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1683)
        at org.apache.crimson.parser.Parser2.content(Parser2.java:1926)
        at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1654)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:634)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:333)
        at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)

        at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
        at javax.xml.parsers.SAXParser.parse(SAXParser.java:143)
        at com.opensymphony.user.util.ConfigLoader.load(ConfigLoader.java:59)
        at com.opensymphony.user.UserManager.<init>(UserManager.java:107)
        at com.opensymphony.user.UserManager.<init>(UserManager.java:58)
        at com.opensymphony.user.UserManager.getInstance(UserManager.java:126)
        at org.apache.jsp.default_jsp._jspService(default_jsp.java:62)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:210)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:2

 

 

I'm declaring the property in the following manner:

<opensymphony-user>

    <provider class="com.opensymphony.user.provider.jdbc.JDBCAccessProvider">
      <property name="datasource">jdbc/tronworkflow2000</property>
    </provider>
    <provider class="com.opensymphony.user.provider.jdbc.JDBCCredentialsProvider" />
    <provider class="com.opensymphony.user.provider.jdbc.JDBCProfileProvider" />
    
<!--
    <provider class="com.opensymphony.user.provider.memory.MemoryAccessProvider" />
    <provider class="com.opensymphony.user.provider.memory.MemoryCredentialsProvider" />
    <provider class="com.opensymphony.user.provider.memory.MemoryProfileProvider" />
-->
    <!--
  Authenticators can take properties just like providers.

  This smart authenticator should work for 'most' cases - it dynamically looks up
  the most appropriate authenticator for the current server.
 -->
 <authenticator class="com.opensymphony.user.authenticator.SmartAuthenticator" />
</opensymphony-user>
Thanks,
António Lourinho


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