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SCA "Invalid State Machine" Error when Receiving a SIP BYE (Doc ID 1314395.1)

Last updated on DECEMBER 04, 2019

Applies to:

Oracle Communications Network Charging and Control - Version 3.2.0 and later
Information in this document applies to any platform.

Symptoms

 

Note:
- SIP stands for Session Initiation Protocol
- SCA stands for SIP Call Agent



  1. The /var/adm/messages or SCA log files write this following error message:
    ERROR: (SIPInteraction.cc:1806) 1500: State machine error; transition: IN_RELEASE_A, state: Closing
  2. Apart of call flow, we can see SIP proxy of A-Leg is flooding with BYEs message to the SCA, in normal circumstances this particular BYE message is only sent once.



The call flow above is drawn based on the real traffic which is captured by snoop.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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