主库是两节点RAC，备库是单实例。在备库恢复数据库后，无法实现传输主库日志到备库。查看告警日志及trace文件，发现错误

Error 12154 received logging on to the standby

FAL[client, USER]: Error 12154 connecting to primary1,primary2 for fetching gap sequence

Mon Aug 05 19:45:32 2019

主库ARC0的trace文件中有错误

2019-08-05 18:05:32.891

OCISessionBegin failed. Error -1

.. Detailed OCI error val is 1017 and errmsg is 'ORA-01017: invalid username/password; logon denied

'

Error 16047 attaching to destination LOG_ARCHIVE_DEST_2 standby host 'standby'

*** 2019-08-05 18:05:32.942 2917 krsi.c

krsi_dst_fail: dest:2 err:16047 force:0 blast:1

kcrrwkx: unknown error:16047

Initial buffer sizes: read 1024K, overflow 832K, change 805K

怀疑是密码文件的问题，把主库节点1的密码文件复制到节点2，再复制到备库。并未解决问题。