ORA-12514

在一次搭建oracle 10G dataguard时,主库无法传日志到备库,alert日志报如下错误:

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
PING[ARC0]: Heartbeat failed to connect to standby 'TEST3_DG'. Error is 12514.

tinsping TEST3_DG 是通的,比较有用的诊断方法是,在主库执行命令:

sqlplus sys/password@TEST3_DG as sysdba

还是报如下错误:

ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor

说明备库的监听配置有问题,仔细检查了listener.ora,确实是发现了错误,修正之后同步正常。

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