Archive logs are missing in hot backup

Question

Hi All,
We are using the following commands to take hot backup of our database. Hot backup is fired by "backup" user on Linux system.
=======================
rman target / nocatalog <<EOF
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '$backup_dir/$date/%F';
run {
allocate channel oem_backup_disk1 type disk format '$backup_dir/$date/%U';
#--Switch archive logs for all threads
sql 'alter system archive log current';
backup as COMPRESSED BACKUPSET database include current controlfile;
#--Switch archive logs for all threads
sql 'alter system archive log current';
#--Backup Archive logs and delete what we've backedup
backup as COMPRESSED BACKUPSET archivelog all not backed up delete all input;
release channel oem_backup_disk1;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;
exit
EOF
=======================
Due to which after command (used 2 times) "sql 'alter system archive log current';" I see the following lines in alert log 2 times. Because of this all the online logs are not getting archived (Missing 2 logs per day), the backup taken is unusable when restoring. I am worried about this. I there any to avoid this situation.
=======================
Errors in file /u01/oracle/admin/rac/udump/rac1_ora_3546.trc:
ORA-19504: failed to create file "+DATA/rac/1_32309_632680691.dbf"
ORA-17502: ksfdcre:4 Failed to create file +DATA/rac/1_32309_632680691.dbf
ORA-15055: unable to connect to ASM instance
ORA-01031: insufficient privileges
=======================
Regards,
Kunal.

Answer 1

All thanks you for help, pleas find additional information. I goth the following error as log sequence was missing. Everyday during hotbackup, there are 2 missing archive logs, which makes our backup inconsistent and useless.
archive log filename=/mnt/xtra-backup/ora_archivelogs/1_32531_632680691.dbf thread=1 sequence=32531
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28768_632680691.dbf thread=2 sequence=28768
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28769_632680691.dbf thread=2 sequence=28769
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28770_632680691.dbf thread=2 sequence=28770
archive log filename=/mnt/xtra-backup/ora_archivelogs/1_32532_632680691.dbf thread=1 sequence=32532
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28771_632680691.dbf thread=2 sequence=28771
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf thread=2 sequence=28772
archive log filename=/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf thread=2 sequence=28773
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 12/13/2012 04:22:56
RMAN-11003: failure during parse/execution of SQL statement: alter database recover logfile '/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf'
ORA-00310: archived log contains sequence 28772; sequence 28773 required
ORA-00334: archived log: '/mnt/xtra-backup/ora_archivelogs/2_28772_632680691.dbf'
Let me try the susggestions provided above.