standby报错：PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

standby报错：

Mon Apr 25 12:18:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:19:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:20:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:21:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:22:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:23:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:24:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

Mon Apr 25 12:25:26 2016

PING[ARC2]: Heartbeat failed to connect to standby 'orcl'. Error is 16009.

standby：

SQL>  select dest_id,error from v$archive_dest;

   DEST_ID ERROR

---------- -----------------------------------------------------------------

         1

         2 ORA-16009: invalid redo transport destination

查看standby的log_archive_dest_2如下：

SQL> show parameter log_archive_dest_2;

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

log_archive_dest_2                   string      service=orcl async valid_for=(all_logfiles,all_roles) db_unique_name=orcl

修改standby的log_archive_dest_2如下：

SQL> alter system set log_archive_dest_2='service=orcl async valid_for=(online_logfiles,primary_roles) db_unique_name=orcl';

System altered.

问题解决。