dg rman备份RMAN-06820:

在rman备份的过程中提示：
Starting backup at 11-APR-17
RMAN-06820: WARNING: failed to archive current log at primary database
ORACLE error from target database:
ORA-17629: Cannot connect to the remote database server
ORA-17627: ORA-12154: TNS:could not resolve the connect identifier specified
ORA-17629: Cannot connect to the remote database server

查看配置show all,一个唯一值对应了2个配置
CONFIGURE DB_UNIQUE_NAME ‘xx_stdby’ CONNECT IDENTIFIER ‘dg1’;
CONFIGURE DB_UNIQUE_NAME ‘xx_stdby’ CONNECT IDENTIFIER ‘xx_stdby’;
删除从新配置下
CONFIGURE DB_UNIQUE_NAME ‘xx_stdby’ clear;