My Oracle Support Banner

Error with Connection to SMS Screen/DB. ORA-00018 (Doc ID 1275371.1)

Last updated on DECEMBER 29, 2023

Applies to:

Oracle Communications Network Charging and Control - Version 3.1.0 and later
Information in this document applies to any platform.


- Attempts to access the Screens on SMS (Service Management System)  have failed.
- Attempts to connect to an SQL session was not successful.

The SQL session and java console show following error messages:

java.sql.SQLException: ORA-00018: maximum number of sessions exceeded


For more information about Java Console, please refer to Article 452853.1


Sometimes scripts open several SQL sessions to connect to the DB and retrieve certain data like :

- Monitoring System plugin (Example : Nagios in this case)

Those scripts are not closing their SQL sessions properly due to poorly written external scripts (non product scripts) or due to improper script ending (e.g. unexpected kill).


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.