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diameterControlAgent (DCA) Frequently Reporting "Unknown Session-Id" Error Messages (Doc ID 1363808.1)

Last updated on FEBRUARY 27, 2019

Applies to:

Oracle Communications Network Charging and Control - Version 4.3.0 and later
Information in this document applies to any platform.


A very high number of "Unknown session-id" error messages are reported by the Service Logic Controller's (SLC) diameterControlAgent (DCA) process, which is a gateway for a real-time Online Charging System (OCS), as defined by the RFC (Request for Comments) 4006 - Diameter Credit-Control Application (RFC 4006) standards document.

Example of DCA "Unknown session-id" error message:

Jul 19 03:12:19 <Hostname> diameterControlAgent: [ID 675952 user.error] diameterControlAgent(5065) ERROR: {960021} Unknown session-id. Origin-Host=<Origina-Host>, Session-Id=<Session ID>

The error messages are mainly being raised when the first Diameter protocol Credit-ControlRequest Update message is received by DCA (sometime after the Credit-ControlRequest Initial begins the diameter session), as shown in the sequence diagram below:

For the latest technical documentation please refer to <note 1341844.1> - How to Download Oracle Communications Network Charging and Control (OCNCC/NCC) Documentation.  The DCA Technical Guide and Diameter Control Agent Compliance Protocol Implementation Conformance Statement documents can be found here.


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