When an error is marked Closed-Fixed, it's considered resolved. However, Noibu keeps a record of the error's signature indefinitely, and if the error happens again, you'll receive a notification via email. Below is a sample of this email:
Please note that Noibu does not automatically reopen the issue upon sending the alert. It's up to you whether or not to investigate the reoccurrence. Furthermore, you'll only receive this email alert once.