Solution:
Make sure log_archive_config parameter have correct db_unique_name for both primary and standby in both primary and standby database.
Example:
1. In primary database db_unique_name is tsm1_dg and in standby database db_unique_name is tsm2_dg then log_archive_config should be
log_archive_config='dg_config=(tsm1_dg,tsm2_dg)'
set it if it’s not set or if you have wrong value there . I got this error in primary database so describe here how I fixed that in primary database.
SQL> alter system set log_archive_config='dg_config=(tsm1_dg,tsm2_dg)';
2. Make sure your log_archive_dest_x is enable and have proper value
alter system set log_archive_dest_3='service="(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = stagedb6.ipx.com)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = tsm2_dg_DGMGRL.ipx.com)(SERVER = DEDICATED)))"','LGWR ASYNC NOAFFIRM delay=0 optional compression=disable max_failure=0 max_connections=1 reopen=300 db_unique_name="tsm2_dg"','valid_for=(all_logfiles,primary_role)';
SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_3=ENABLE;
3. Execute following query before check:
SQL> alter system log switch;
or
SQL> alter system archive log current;
4. Check error is clear or not
SELECT DEST_ID "ID",
STATUS "DB_status",
DESTINATION "Archive_dest",
ERROR "Error"
FROM V$ARCHIVE_DEST WHERE DEST_ID <=5;