ALERT LOG:
..... Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored Transaction recovery: lock conflict caught and ignored .....
SMON TRACE:
..... *** 2011-12-26 14:42:46.401 Serial Transaction recovery caught exception 30319 Serial Transaction recovery caught exception 601 *** 2011-12-26 14:46:25.455 Serial Transaction recovery caught exception 601 Serial Transaction recovery caught exception 601 Serial Transaction recovery caught exception 601 Serial Transaction recovery caught exception 601 .....
The customer said the error started after SUPPLEMENTAL LOGGING enabled. But, the messages have not disappeared after disabling it.