I asked an ACS question in this thread the other day and it got answered so not sure if this is the right thread or not but I couldn't see any ACS questions under the Security or AAA threads.
I'm running 2 ACS 4.2(patch 11) servers and the logging seems to have stopped working. Whilst some events are logged sporadically (some devices in particular consistently work - CatOS switches seem to still log TACACS accounting), the majority of messages I would expect to see in most of the logs are not present.
I have tried changing the frequency of the logging from monthly to weekly to daily and each time I change the frequency its as if some messages that were "held up" suddenly appear in the penultimate log file where they should have been present the whole time.
I can confirm that the ACS server is handling the AAA correctly just that it seems to not log it.
I was thinking about raising a TAC but thought I'd try here first.