However, the archived log file recorded in control file could not found and therefore RMAN backup failed. The process of RMAN job was to purge obsolete archived log file based on RMAN retention policy. RMAN-06059: expected archived log not found, lost of archived log compromises recoverability RMAN-03002: failure of backup command at 00:08:40 RMAN-00569: = ERROR MESSAGE STACK FOLLOWS = The daily scheduled RMAN backup job failed due to errors below. Days ago, one of our production databases experienced RMAN backup problem.