SQL/MySQL/ORACLE DBA Learning

Hi

How to fixed ORA-12518 issue

without giving the exact issue, nothing can be explained with your queries

Status : Failure -Test failed: Listener refused the connection with the following error: ORA-12518, TNS:listener could not hand off client connection (CONNECTION_ID=M82dg4AWSwiYsYvxMfWQpA==)

its network error

So, how can I login

Which database it is ?

Oracle sql devloper

Maybe some settings you need to change