Why my Oracle Database is not dynamically registered with the Listener?

Posted on by Ahmed Abdel Fattah

Here, we have couple of puzzles, they are mainly:1- Why the database services are dynamically registered with non-default listener while the local_listener definition doesn't exist in the tnsnames.ora file?2- If you do some changes in the tnsnames.ora file related to the local_listener, are these changes dynamically reflected to the database and listener? or do you … Continue reading Why my Oracle Database is not dynamically registered with the Listener?

TNS-04012: Unable to start Oracle Connection Manager instance.

Posted on by Ahmed Abdel Fattah

Background: One advantage of the "Connection Manager" is that it can act as if a proxy server between the database client and the database server, especially when there is a firewall between the client and the server.I installed Oracle Client 19c (only the "Connection Manager" and the "Oracle Net Listener" components): https://www.youtube.com/watch?v=R-tSVkRckfs Then I configured … Continue reading TNS-04012: Unable to start Oracle Connection Manager instance.