The Scheduler and Application Server both fail immediately after startup with an error similar to...
*** Error in `event_demon': free(): invalid pointer: 0xf6e8a4f4 ***
The error is followed by a backtrace.
This is due to a known issue in the WAAE code that sometimes occurs when the Oracle TNS alias is greater than 30 characters.
WAAE 11.3.6 SP6 and below
There is a fix for this issue in 11.3.6 SP7.
Workaround is to shorten the Oracle TNS alias to something under 30 characters.