Sample Error:
Cause:channel ch01: starting archived log backup set
released channel: ch00
released channel: ch01
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ch01 channel at 06/07/2012 02:18:31
ORA-19588: archived log RECID 885302 STAMP 785287904 is no longer valid
RMAN>
Recovery Manager complete.
The reason for this is archive logfile which this process is trying to take backup, is already been backed up by another process and file is deleted.
Solution:
Check whether there is already a RMAN backup in place.
ps -ef | grep rman
Don’t schedule archive backup job during full database backup. Always make sure you have only one RMAN backup in process