Cannot create JDBC driver of class '' for connect URL 'null'

记录一个配置点！

Tomcat 5.5.27 环境下配置连接池：

<Resource name="openEAP_DS" type="javax.sql.DataSource" driverClassName="com.sybase.jdbc3.jdbc.SybDriver" url="jdbc:sybase:Tds:172.16.53.241:5000/MDD?CHARSET=eucgb&amp;LANGUAGE=chinese" username="sa" password="" maxActive="20" maxIdle="10" maxWait="-1"/>

这段放在server.xml的GlobalNamingResources节点下，代码中会抛出异常：

> > > org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
> > >         at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:780)
> > >         at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540)

改放到应用的Context节点下。正常！ so funny！