ORA-12528
Table of Contents
1 错误信息
ERROR:ORA-12528: TNS:listener: all appropriate instances are blocking new connections
2 原因
- 实例未打开(搭建standby时常见)
- 使用动态监听未配置local_listener引起
3 解决方法
3.1 实例未打开
举个粟子,使用duplicate 复制数据库时,目标实例只启动到nomount状态。此时,监听 中对应实例的状态就是“BLOCKED”. 解决方法是在TSN配置添加特殊标记(UR = A),示例 如下:
TEST_DG = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.10 )(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = halberd) (UR=A) ) )
3.2 监听相关
3.2.1 动态监听改为静态监听
静态监听配置示例如下:
SID_LIST_LISTENER_FOREIGN = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (PROGRAM = extproc) ) (SID_DESC = (SID_NAME = dbm012) (ORACLE_HOME = /u01/app/oracle/product/11.2.0.4/dbhome_1) (GLOBAL_DBNAME=dbm01) ) ) LISTENER_FOREIGN = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) (ADDRESS = (PROTOCOL = TCP)(HOST = 172.24.69.47)(PORT = 1521)) ) )
3.2.2 配置local_listener
使用动态监听,但是没有配置local_listener参数。案例解决如下:
-
修改local_listener参数
-- 修改local_listener SYS@halberddg1>show parameter list NAME TYPE VALUE -------------------- ------ ------------------------------ listener_networks string local_listener string remote_listener string SYS@halberddg1>alter system set local_listener=‘(ADDRESS=(PROTOCAL=TCP)(HOST=10.1.10.131)(PORT=1521))‘; System altered. SYS@halberddg1> SYS@halberddg1> SYS@halberddg1> show parameter list NAME TYPE VALUE -------------------- ------ ------------------------------ listener_networks string local_listener string (ADDRESS=(PROTOCAL=TCP)(HOST=1 0.1.61.131)(PORT=1521)) remote_listener string SYS@halberddg1> exit # 修改监听配置文件(listener.ora),将global_dbname(halberd 改为halberddg1) 部分内容如下: (GLOBAL_DBNAME = halberddg1) (ORACLE_HOME=/tpsys/app/oracle/product/12.1.0.2/dbhome_1) (SID_NAME=halberddg1)
Created: 2019-12-22 Sun 13:19
ORA-12528: TNS:listener: all appropriate instances are blocking new connections