Error 1033 received logging on to the standby（dg主库alert报错，日志未传输过去）

Thu Oct 15 10:20:39 2015
Error 1033 received logging on to the standby
PING[ARC2]: Heartbeat failed to connect to standby 'orcl_std'. Error is 1033.
Thu Oct 15 10:21:41 2015
Error 1033 received logging on to the standby
PING[ARC2]: Heartbeat failed to connect to standby 'orcl_std'. Error is 1033.
Thu Oct 15 10:22:43 2015
Error 1033 received logging on to the standby
PING[ARC2]: Heartbeat failed to connect to standby 'orcl_std'. Error is 1033.
Thu Oct 15 10:23:52 2015

最近在学dg，主库rhel6.4 11g，备库7.1 11g，搭好dg之后发现redo没有传到备库，备库select * from v$archived_log;也没东西，备库也没有rfs进程，主库alert一直报错，用连接串连备库连不上，主库可以，就把密码文件重新传了一下，问题解决。

正常备库

SQL> select process,status from v$managed_standby;

PROCESS   STATUS
--------- ------------
ARCH      CONNECTED
ARCH      CONNECTED
ARCH      CONNECTED
ARCH      CONNECTED
MRP0      WAIT_FOR_LOG
RFS       IDLE
RFS       IDLE
RFS       IDLE
RFS       IDLE

9 rows selected.