PK76241; 7.0.0.1: SIP proxy udp channel deadlock while under load

Downloadable files


Abstract

After running a heavy load for a period of time, Session Initiation Protocol (SIP) proxy stops responding to SIP requests.

Download Description

PK76241 resolves the following problem:

ERROR DESCRIPTION:
Running the SIP proxy under load for a period of time leads to a deadlock in the UDP Channel.

LOCAL FIX:

PROBLEM SUMMARY:

USERS AFFECTED:
All users of WebSphere Application Server V7.0

PROBLEM DESCRIPTION:
After running a heavy load for a period of time, Session Initiation Protocol (SIP) proxy stops responding
to SIP requests.

RECOMMENDATION:
None

There is a small timing window in the UDP channel that can possibly cause a deadlock between two synchronization blocks. This seemed to only occur at high data rates where the time window is decreased between SIP packets.

PROBLEM CONCLUSION:
The code was rearranged to move one synchronization block outside of the other one. There is now no way for a deadlock to occur with these two synchronized objects.

The fix for this APAR is currently targeted for inclusion in fixpack 7.0.0.3.

Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Prerequisites

Please download the UpdateInstaller below to install this fix.

URL LANGUAGE SIZE(Bytes)
UpdateInstaller US English 7250000

Installation Instructions

Please review the readme.txt for detailed installation instructions.

URL LANGUAGE SIZE(Bytes)
Readme US English 6957

Download package


Download RELEASE DATE LANGUAGE SIZE(Bytes) Download Options
What is Fix Central (FC)?
What is DD?
7.0.0.0-WS-WAS-IFPK76241 12/9/2008 US English 26757 FC FTP DD

Technical support

Contact IBM Support using SR (http://www-306.ibm.com/software/support/probsub.html), visit the WebSphere Application Server Support Web site (http://www.ibm.com/software/webservers/appserv/was/support/), or contact 1-800-IBM-SERV(U.S. only).

Cross reference information
Segment Product Component Platform Version Edition
Application Servers WebSphere Application Server for z/OS z/OS 7.0


Problems (APARS) fixed
PK76241

Rate this page:

(0 users)Average rating

Add comments

Document information


More support for:

WebSphere Application Server
Proxy server

Software version:

7.0, 7.0.0.1

Operating system(s):

AIX, HP-UX, IBM i, Linux, Solaris, Windows

Software edition:

Network Deployment

Reference #:

4021632

Modified date:

2008-12-11

Translate my page

Machine Translation

Content navigation