So I tried debugging this a little further; in listener.c I added some debug output around the sections where actconn is in-/decreased. As light test traffic is running, I can see the following (took a few hours):
(...) Increased actconn to 1 (in line 611) Decreased actconn to 0 (in line 682) Decreased actconn to -1 (in line 627) Out of many thousand occurences of modifying actconn, there's a single instance of actconn getting decreased in line 627, so apparently the accept returned with an unexpected value. Unfortunately, I missed getting the output of "show errors" before terminating the process. Hints on how to debug this better would be appreciated. Regards, J.
