PM51856: SIP PROXY MUST RESPOND WITH AN ERROR WHEN SESSIONS BECOME UNREACHABLE

Fixes are available

APAR status

Closed as program error.

Error description

Session Initiation Protocol (SIP) proxy must respond with an
error when sessions become unreachable.

Local fix

```
NA
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0 and V8.0 Session Initiation     *
*                  Protocol (SIP) Proxy.                       *
****************************************************************
* PROBLEM DESCRIPTION: SIP Proxy does not respond with an      *
*                      error if a UDP message can not be       *
*                      delivered to an application server.     *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
SIP UDP requests that are addressed to a specific partition ID
are dropped at the SIP Proxy if the corresponding application
server is not functioning.   No error response is generated.

Problem conclusion

Previously, the SIP Proxy dropped UDP requests when the
Application Server was not reachable, instead of responding
with an error.   Most of the time, a failover occurs and the
retransmitted UDP packets are delivered to the proper
application server.

The SIP Proxy will now drop UDP requests for a certain amount
of time.   If the partition ID does not failover within this
time, the SIP Proxy will respond with an error.

To enable this functionality, please add this new timeout
value to the SIP Proxy custom properties --->
udpLSNFailoverTimeout.   The SIP Proxy custom properties are
located here ---> WebSphere proxy servers > proxy1 > SIP proxy
settings > Custom properties.  Set this property to the amount
of time the SIP Proxy should wait for the failover to occur.

The fix for this APAR is currently targeted for inclusion in
fix packs 7.0.0.23 and 8.0.0.4.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

```
N/A
```

Comments

APAR Information

APAR number
PM51856
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-11-09
Closed date
2012-02-22
Last modified date
2012-02-22

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
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R700 PSY
UP
R800 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 October 2021

Tips

PM51856: SIP PROXY MUST RESPOND WITH AN ERROR WHEN SESSIONS BECOME UNREACHABLE

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R700 PSY

R800 PSY

Document Information

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