webservices 部署项目问题

import com.common.ConnectionFactory;

public class WebCommon {

public List getTbData(String tbname) {

    ResultSet rs = null;
    List rsall = new ArrayList();
    HashMap  rsTree;

    try {

        Connection conn = ConnectionFactory.getConnection();
        Statement stm = conn.createStatement();

// stm = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
// ResultSet.CONCUR_READ_ONLY);

        String sql = "select * from " + tbname;
        rs = stm.executeQuery(sql);
        ResultSetMetaData rsmd = rs.getMetaData();// 取数据库的列名 我觉得名比1，2，3..更好用
        int numberOfColumns = rsmd.getColumnCount();
        while (rs.next()) {

            rsTree = new HashMap(numberOfColumns);// 注意要new
            for (int r = 1; r < numberOfColumns + 1; r++) {
                rsTree.put(rsmd.getColumnName(r), rs.getObject(r));
            }
            rsall.add(rsTree);
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
    return rsall;
}

}

以上代码部署成webservice以后就遇到以下问题
[WARN] Unable to locate a BeanInfo cache for class java.util.HashMap (stopClass=class java.util.AbstractMap). This will negatively affect performance!