About archive log issue

Question

DB version: 11.1.0.7
when I issue cmd " alter system archive log current", the alertlog raise error "Thread 1 cannot allocate new log, sequence 149, Private strand flush not complete".
I think it's normal, because in the log file , here some dirty data have NOT been written to the data_files, so it can raise the error Private strand flush not complete.
BUT in my point, when I issue the cmd "alter system checkpoint" and then, subsequently, I issue the " alter system archive log current", there shoud not raise any error" becasue the dirty data already been written via the cmd "alter system checkpoint". but in the alertlog the error still here (Private strand flush not complete).
that's why, How can I understand that. thanks!

Answer 1

To understand it, please check Doc 372557.1 Alert Log Messages: Private Strand Flush Not Complete
and
cannot allocate new log&Private strand flush not complete
Edited by: Fran on 25-jun-2012 1:07