How to recover a single DB within a good environment?

Question

Hello,
after an unknown crash, I have now an unusable DB. But the environment is good and can be opened without any problem. It's only when i try to open that DB that I get an error : Invalid argument.
Of course, before the crash, everything worked well.
So, is there a way to recover that DB?
Note : Up to now, I do not have any backups for disaster recovery but i am still in a development process.
I have just tested something : I tried to open and read some data from that DB without using my environment and everything worked well. So, I'm able to open it without my environment but I can't if I try to open it within my environment?
Why and how may I solve this situation?
Thank you
Edited by: user606302 on Oct 1, 2008 12:07 PM

Answer 1

Hello,
Normal recovery which you are doing, examines the content
of the environment's log files and uses this information
to ensure that your database files are consistent relative
to the information contained in the log files. Normal recovery
starts with any logs used by any transactions active at the
time of the last checkpoint, and examines all logs from then
to the current logs. Normal recovery also recreates your
environment's region files. This has the desired effect of
clearing any unreleased locks that your application may have
held at the time of an unclean application shutdown.
You can turn on verbose error messaging as that should
provide additional information on what is causing the
Invalid argument error.
For that take a look at:
DB_ENV->set_errfile
http://www.oracle.com/technology/documentation/berkeley-db/db/api_c/env_set_errfile.html
Please post any additional messaging from that.
It that sheds no light on the problem, please post a
small, stand-alone test case which reproduces the problem
and I can take a further look.
Thanks,
Sandra