Exceptions logged without stack trace

Topics: Core, Troubleshooting
Oct 9, 2015 at 12:04 PM
We are getting a lot of lines in the error log files with the following content:
2015-10-09 11:16:04,920 [42] NHibernate.Util.ADOExceptionReporter - Index was outside the bounds of the array.
No further information is provided. (These errors seem to be happening during the routing, at the very beginning of the call of the web page.)

Why is the stack trace missing? Is it a configuration which we can change?