Hi All,
I have an interesting/ scary scenario here. Take a look at the series of ORA-s this alert file.
Questions:
What was going on?
How do I prevent this?
NB note that the log (48276) eventually succeeded to be archived. And followed by message "Archiver process freed from errors. No longer stopped."
Thanks
Tony.

Thread 1 advanced to log sequence 48274
Current log# 3 seq# 48274 mem# 0: /dev/rprod_0016_009
Current log# 3 seq# 48274 mem# 1: /dev/rprod_0016_010
Current log# 3 seq# 48274 mem# 2: /dev/rprod_0016_011
Fri Apr 5 18:40:26 2002
ARC1: Beginning to archive log# 2 seq# 48273
ARC1: Completed archiving log# 2 seq# 48273
Fri Apr 5 18:48:44 2002
Thread 1 advanced to log sequence 48275
Current log# 1 seq# 48275 mem# 0: /dev/rprod_0016_003
Current log# 1 seq# 48275 mem# 1: /dev/rprod_0016_004
Current log# 1 seq# 48275 mem# 2: /dev/rprod_0016_005
Fri Apr 5 18:48:44 2002
ARC0: Beginning to archive log# 3 seq# 48274
ARC0: Completed archiving log# 3 seq# 48274
Fri Apr 5 18:58:04 2002
Thread 1 advanced to log sequence 48276
Current log# 2 seq# 48276 mem# 0: /dev/rprod_0016_006
Current log# 2 seq# 48276 mem# 1: /dev/rprod_0016_007
Current log# 2 seq# 48276 mem# 2: /dev/rprod_0016_008
Fri Apr 5 18:58:05 2002
ARC2: Beginning to archive log# 1 seq# 48275
ARC2: Completed archiving log# 1 seq# 48275
Fri Apr 5 19:00:04 2002
Thread 1 advanced to log sequence 48277
Current log# 3 seq# 48277 mem# 0: /dev/rprod_0016_009
Current log# 3 seq# 48277 mem# 1: /dev/rprod_0016_010
Current log# 3 seq# 48277 mem# 2: /dev/rprod_0016_011
Fri Apr 5 19:08:15 2002
ARC1: Beginning to archive log# 2 seq# 48276
ARC1: Error 19504 creating archivelog file '/u02/oracle/admin/prod/arch/prod1/re
do1_48276.arc'
ARC1: Archiving not possible: error count exceeded
ARC1: Failed to archive log# 2 seq# 48276
ARCH: Archival stopped, error occurred. Will continue retrying
Fri Apr 5 19:08:16 2002
ORACLE Instance prod1 - Archival Error
ARCH: Connecting to console port...
Fri Apr 5 19:08:16 2002
ORA-16014: log 2 sequence# 48276 not archived, no available destinations
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_006'
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_007'
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_008'
ARCH: Connecting to console port...
ARCH:
ORA-16014: log 2 sequence# 48276 not archived, no available destinations
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_006'
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_007'
ORA-00312: online log 2 thread 1: '/dev/rprod_0016_008'
Thread 1 advanced to log sequence 48278
Current log# 1 seq# 48278 mem# 0: /dev/rprod_0016_003
Current log# 1 seq# 48278 mem# 1: /dev/rprod_0016_004
Current log# 1 seq# 48278 mem# 2: /dev/rprod_0016_005
Fri Apr 5 19:19:38 2002
ARC2: Beginning to archive log# 2 seq# 48276
ARC2: Completed archiving log# 2 seq# 48276
Archiver process freed from errors. No longer stopped.
Fri Apr 5 19:19:42 2002
ARC0: Beginning to archive log# 3 seq# 48277
ARC0: Completed archiving log# 3 seq# 48277
Fri Apr 5 19:23:15 2002