ORA-16014: log n sequence# not archived, no available destinations

Recently i created a standby database but soon at the primary side started seeing the below error:


Thu May 3 15:09:42 2012
Errors in file /app/oracle/admin/orcl/trace/bdump/orcl_arc1_246675.trc:

ORA-16014: log 9 sequence# 269 not archived, no available destinations
ORA-00312: online log 9 thread 1: '/ora03/oradata/orcl/redo_stby/orcl_redo_g9m1.rdo'
ORA-00312: online log 9 thread 1: '/ora04/oradata/orcl/redo_stby/orcl_redo_g9m2.rdo'

Similarly

Thu May 3 15:19:52 2012

ORACLE Instance orcl - Archival Error
Thu May 3 15:19:52 2012
ORA-16014: log 10 sequence# 270 not archived, no available destinations
ORA-00312: online log 10 thread 1: '/ora01/oradata/orcl/redo_stby/orcl_redo_g10m1.rdo'
ORA-00312: online log 10 thread 1: '/ora02/oradata/orcl/redo_stby/orcl_redo_g10m2.rdo'

and


Thu May 3 15:22:29 2012
ORACLE Instance orcl - Archival Error
Thu May 3 15:22:29 2012
ORA-16014: log 6 sequence# 272 not archived, no available destinations
ORA-00312: online log 6 thread 1: '/ora01/oradata/orcl/redo_stby/orcl_redo_g6m1.rdo'
ORA-00312: online log 6 thread 1: '/ora02/oradata/orcl/redo_stby/orcl_redo_g6m2.rdo'

To resolve this i found that the redo log groups  6,9,10 were that of standby so only option i had to get rid of these errors was to clear these unarchived redo groups.

So i did the below:
alter database clear unarchived logfile group 6;
alter database clear unarchived logfile group 9;

alter database clear unarchived logfile group 10;
Once i cleared these unarchived standby redo logs , i did not see them again :)