i have an issue suddenly all users accounts can't log in , i checked from database the users table all users exits and no end date for anyone.
how i can fix this problem ....
So you have log in page but what happens when user tries to log in, any error message?
Did you Check database logfile for any error message?
With that information it's hard to debug, but I'll guess it's a database/listener issue.
Surely, something must be wrong somewhere. Try to start and stop everything (nobody can login anyway), what does that tell you ?