<dependency org="net.sourceforge.jtds" name="jtds" rev="1.3.1" />

<Resource name="jdbc/jtds/sybase/somedb"
          auth="Container"
          type="javax.sql.DataSource"
          driverClassName="net.sourceforge.jtds.jdbc.Driver"
          url="jdbc:jtds:sybase://localhost:2501/somedb"
          username="someuser" password="somepassword"
/>

InitialContext cxt = new InitialContext();
if ( cxt == null ) {
    throw new RuntimeException("Uh oh -- no context!");
}
DataSource ds = (DataSource) cxt.lookup( lookupName );

org.apache.tomcat.dbcp.dbcp2.BasicDataSource

Connection conn = ds.getConnection();

java.lang.AbstractMethodError
net.sourceforge.jtds.jdbc.JtdsConnection.isValid(JtdsConnection.java:2833)
org.apache.tomcat.dbcp.dbcp2.DelegatingConnection.isValid(DelegatingConnection.java:924)
org.apache.tomcat.dbcp.dbcp2.PoolableConnection.validate(PoolableConnection.java:282)
org.apache.tomcat.dbcp.dbcp2.PoolableConnectionFactory.validateConnection(PoolableConnectionFactory.java:359)
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:2316)
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2299)
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2043)
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1543)

validationQuery="select 1"

/* (non-Javadoc)
 * @see java.sql.Connection#isValid(int)
 */
public boolean isValid(int timeout) throws SQLException {
    // TODO Auto-generated method stub
    throw new AbstractMethodError();
}

public void More ...validate(String sql, int timeout) throws SQLException {
    ...
    if (sql == null || sql.length() == 0) {
        ...
        if (!isValid(timeout)) {
            throw new SQLException("isValid() returned false");
        }
        return;
    }
...
}

BasicDataSource ds = new BasicDataSource();
 ds.setUsername(user);
 ds.setPassword(getPassword());
 ds.setUrl(jdbcUrl);
 ds.setDriverClassName(driver);
 ds.setMaxTotal(10);
 ds.setValidationQuery("select 1"); //DBCP throws error without this query