Unexpected CANCEL Sent By WCS After 12 Seconds of ACK For 302 (Doc ID 1153846.1)

Last updated on SEPTEMBER 22, 2016

Applies to:

Oracle Communications Service Broker - Version: 3.1.0 and later   [Release: 3.1.0 and later ]
Information in this document applies to any platform.

Symptoms

When WCS is under some load conditions it occasionally sends an unexpected CANCEL message after 12 seconds of ACK for a received 302.

An example of a call flow that simulates the issue:

WCS              AS
INVITE -------->
<----------- 100
<----------- 183
PRACK -------->
<------------- 200 (PRACK)
<------------- 302 (INVITE)
ACK ----------->

For some calls a CANCEL is sent by the WCS after 12 seconds of the ACK for the 302 (the last message in the above call flow)




Cause

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