APAR status
Closed as program error.
Error description
If sending successive re-INVITES on the same call leg before the first has completed, the SIP container does not block the successive re-INVITES with an error. According to the RFC, the successive re-INVITES should receive a 500 error with a retry-after header.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: IBM Websphere Application Server version * * 7.0 CEA Session Initiation Protocol (SIP) * * users * **************************************************************** * PROBLEM DESCRIPTION: The SIP Container does not send a 500 * * response on a second INVITE, when no * * final response to a first INVITE on * * the same dialog. * **************************************************************** * RECOMMENDATION: * **************************************************************** The SIP Container receives a second INVITE before it sends the final response to a first INVITE on the same dialog and does not return a 500 (Server Internal Error) response to the second INVITE (as mentioned in section 14.2 in RFC 3261). In TransactionUserImpl, when processing a UAS request, we do not check if there is a final response to a previous INVITE on the same dialog.
Problem conclusion
In TransactionUserImpl, when processing a UAS request, we now mark each INVITE as non-final till we get final response. In addition, we check if there is a previous INVITE with non-final response, and if so - we send a 500 error with Retry-After header with a randomly chosen value of between 0 and 10 seconds. The fix for this APAR is currently targeted for inclusion in fix pack 1.0.0.11. Please refer to the Recommended Updates page for delivery information: http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
Temporary fix
Comments
APAR Information
APAR number
PM34843
Reported component name
CEA FEATUREPACK
Reported component ID
5724J0855
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-03-15
Closed date
2011-05-04
Last modified date
2011-05-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
CEA FEATUREPACK
Fixed component ID
5724J0855
Applicable component levels
R700 PSY
UP
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Document Information
Modified date:
09 February 2022