ORA-12545: 因目标主机或对象不存在, 连接失败

as sys dba ERROR: ORA-12545: 因目标主机或对象不存在, 连接失败   警告: 您不再连接到 ORACLE。

修改local_listener参数，指定为tnsnames.ora配置的LISTENERS_DB：

show parameter local_listener   NAME TYPE VALUE ------------------------------------ ---------------------- ------------------------------ local_listener string SQL>alter system set local_listener='LISTENERS_DB' scope=both sid='*';   System altered.

tnsnames.ora中配置：

LISTENERS_DB =
  (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = rac1-vip)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = rac2-vip)(PORT = 1521))
  )