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我正在尝试使用DB2JDBC Type4驱动程序配置DB2连接。但我收到此错误。

线程“主”中的异常com.ibm.db2.jcc.am.SqlInvalidAuthorizationSpecException：[jcc] [t4] [201] [11237] [3.64.104]发生了连接授权失败。原因：不支持安全机制。错误代码= -4214，SQLSTATE = 28000

我的代码是

public Connection getConnection() throws ClassNotFoundException, InstantiationException,
                                         IllegalAccessException, SQLException{

   Driver driver = (Driver) Class.forName ( "com.ibm.db2.jcc.DB2Driver" ).newInstance(); 
  DriverManager.registerDriver(driver);
  Connection  connection = DriverManager.getConnection("jdbc:db2://hostname:portnumber
                                           /DBName", "username","password" );
    System.out.println( "From DAO, connection obtained " );
    return connection;  
}

异常日志：

Exception in thread "main" com.ibm.db2.jcc.am.SqlInvalidAuthorizationSpecException:
[jcc][t4][201][11237][3.64.104] Connection authorization failure occurred. 
Reason: Security mechanism not supported. ERRORCODE=-4214, SQLSTATE=28000
    at com.ibm.db2.jcc.am.bd.a(bd.java:677)
    at com.ibm.db2.jcc.am.bd.a(bd.java:60)
    at com.ibm.db2.jcc.am.bd.a(bd.java:120)
    at com.ibm.db2.jcc.t4.b.f(b.java:2389)
    at com.ibm.db2.jcc.t4.b.a(b.java:1712)
    at com.ibm.db2.jcc.t4.y.b(y.java:3612)
    at com.ibm.db2.jcc.t4.y.a(y.java:477)
    at com.ibm.db2.jcc.t4.y.a(y.java:117)
    at …