PK79566; 6.1.0.21: 480 Temporarily Unavailable Response Is Not Sent Upstream

Download Description

PK79566 resolves the following problem:

ERROR DESCRIPTION:
A 480 "Temporarily Unavailable" response is not sent upstream by the Session Initiation Protocol (SIP) Container. The scenario is as follows:

UAC is calling a UAS through the SIP Proxy application. The SIP Proxy forwards the initial INVITE to the UAS. The UAS responds with a 100 Trying response, followed by a 180 Ringing response. Finally, the UAS rejects the call with a 480 response, The SIP proxy does not send this response to the UAC. The log file shows the following:

******************
12/21/08 10:03:34:404 IST] 0000003d ProxyImpl 3 ProxyImpl
sendResponseUpstream Temporarily Unavailable 480
,call-id=1-26016@9.148.45.153
[12/21/08 10:03:34:404 IST] 0000003d ProxyImpl 3 ProxyImpl
sendResponseUpstream Response NOT sent upstream, transaction
already
commited. SIP/2.0 480 Temporarily Unavailable
Content-Length: 0
********************

LOCAL FIX:
N/A

PROBLEM SUMMARY

USERS AFFECTED:
All users of IBM WebSphere Application Server V6.1.

PROBLEM DESCRIPTION:
The problem is that a 480 "Temporarily Unavailable" response is not sent when expected.

RECOMMENDATION:
None

ProxyTo scenario does not send a 480 Session Initiation Protocol (SIP) error response.

PROBLEM CONCLUSION:
A specific SIP object was invalidated prematurely. This issue was fixed and now the SIP container is postponing it to a later phase.

The fix for this APAR is currently targeted for inclusion in fix pack 6.1.0.23 Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980