This article explains how to resolve issue when MINE reports multiple redo log threads with current data
MINE reports multiple redo log threads
Applicable Error Code
FATAL-1278: Multiple (2) redo log threads with current data detected
Replicate 2.7 and 2.8 , Oracle RAC
FATAL-1278: Multiple (2) redo log threads with current data detected, please use parameter _MINE_RAC_SKIP_THREADS
If the database was built as RAC, but now it's used as non-RAC.
E.g. because it's a clone from production RAC.
Set the parameter _MINE_RAC_SKIP_THREADS equal to the redo threads that mine needs to ignore.
You can provide more than one redo threads by separating them with comma. The redo thread is gather from THREAD# is v$log, v$thread, etc.
E.g dbvrep> set _MINE_RAC_SKIP_THREADS = 2, 3
The MINE process must then be restarted.