I've encoutered this problem also today. An application with 8 threads each with its own session faulted everytime I launched it (after a few minutes) with "External exception EBF00BAA", I've tried to obtain a stack trace with little luck. It took time to trace it to the OCI client. Tested with 11.1.0.7 (no patch applied), Windows 7x64 and 2008R2x64. Using 10.2.0.5 it worked. With other three applications which are not multithread there are no issues. I'll try the workaround suggested here: http://www.allroundautomations.com/threads/ubbthreads.php?ubb=showflat&Number=37307#Post37307, because there is no trace of such a issue on Google, I wonder if this is DOA specific for some reason.
I'm going to test 11.2 tomorrow, and applying the latest patch.

I have a similar application with 11 thread running, each with its own connection and get the same error on Oracle 11.2.0.1.0, DOA 4.1 for XE2. It is always the same thread that exports alot of data to a CSV file and I can't even catch it in a try..except block. So the whole application stops.

Did anyone solve this problem?

Here is the way I resolved this problem (Thanks to Ben!):
As you can read, the exeption only appears in multi-threaded app's.
So, you must turn on the ThreadSafe bit of DOA!

FSession:= TOracleSession.Create(nil);
with FSession do
begin
LogonDatabase:= DB;
LogonUsername:= UID;
LogonPassword:= PWD;
ThreadSafe:= true; end;

I have had the same problem for weeks now, no clue whatsoever. My application shows an "External exception EBF00BAA" and just stops processing any queries that follows.. if I switch it to a single-threaded mode, it works totally fine.

I hope turning on the ThreadSafe flag helps. Thanks to all.


-Ben Park