Fixes are available
APAR status
Closed as program error.
Error description
WebSphere MQ Version 7 Java and Java Message Service (JMS) clients configured to share channel connections may not share the same connection if multiple connection attempts are attempted concurrently. This can result in multiple channel connections with a low conversation count. Also, if shared connections are being created and closed at the same time, it is possible that a connection attempt will return with either a 2009 (MQRC_CONNECTION_BROKEN) or 2059 (MQRC_Q_MGR_NOT_AVAILABLE) error.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: This issue affects WebSphere MQ Version 7 Java and JMS users who utilise shared connections. Platforms affected: All Distributed (iSeries, all Unix and Windows) +Java **************************************************************** PROBLEM SUMMARY: There is a small timing window when a connection is created where it is not available to be shared. This results in the second connection attempt ignoring the connection in the process of being established, and could result in a new channel connection being created. A similar problem exists when connections are being closed. If a new connection attempt is made when the final conversation is being closed on a connection, it is possible that the channel connection is closed before the new connection attempt completes.
Problem conclusion
The connection sharing code has been updated to wait for any "in-progress" connection attempt to complete, if no other connection is suitable for sharing. A similar change has been made to the connection close code to wait if the last conversation is being closed, and there is a connection attempt in progress. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 7.0.0.1 -------- -------------------- Windows U200301 AIX U821414 HP-UX (PA-RISC) U820765 HP-UX (Itanium) U821296 Solaris (SPARC) U820766 Solaris (x86-64) U820880 iSeries tbc_p700_0_0_1 Linux (x86) U821407 Linux (x86-64) U821295 Linux (zSeries) U821294 Linux (Power) U820881 The latest available maintenance can be obtained from 'Websphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available, information on its planned availability can be found in 'Websphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IC58543
Reported component name
WMQ WINDOWS V7
Reported component ID
5724H7220
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2008-10-17
Closed date
2008-10-31
Last modified date
2009-03-10
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
WMQ WINDOWS V7
Fixed component ID
5724H7220
Applicable component levels
R700 PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDEZSF","label":"IBM WebSphere MQ Managed File Transfer for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 March 2023