Rman-08137 main library failed to delete archive file

When deleting an archive in the main database, the following error occurs
RMAN > delete archivelog until time "sysdate-7";
RMAN-08137: Warning ： Archive log not deleted , Because the standby or upstream capture process needs it
as a result of log_archive_dest_state_x Set to DEFER, however Oracle Thought that as long as it was set log_archive_dest_n The standby database is considered to exist , Just temporarily unavailable , Therefore, the archive will not be deleted .
You can do this by setting hidden parameters （ Dynamic parameters ） To avoid this problem , The default value is true, This parameter will consider the deferred archive destination completely unavailable , And archive logs are no longer saved for these destinations
stay SQLplus Modify the following parameters
alter system set "
_deferred_log_dest_is_valid" = FALSE scope=both;
SQL > alter system set "
_deferred_log_dest_is_valid" = FALSE scope=both;
Then log in RMAN Now you can clean up the archive log ：
RMAN> delete archivelog until time "sysdate-7"; -- Delete 7 Archive logs from days ago .
Delete successful ！