APAR status
Closed as program error.
Error description
Noticeable delays of over 5 seconds when asynchronous consumers consume messages from a WebSphere MQ queue using the match option MQMO_MATCH_MSG_TOKEN.
Local fix
Set the SHARECNV attribute on the SVRCONN channel to 0, or if using an MDB, set the provider version property on the Activation Specification to "6" to force the V6 migration mode to be used.
Problem summary
**************************************************************** USERS AFFECTED: Users who use message matching option MQMO_MATCH_MSG_TOKEN either directly, or via an MQ JMS activation specification or listener port client may be affected by this issue. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: WebSphere MQ was incorrectly allowing applications that consume messages via the asynchronous consume mechanism to be made eligible to wait for messages if they used the MQMO_MATCH_MSG_TOKEN match option. This problem has the potential to cause messages to remain on the queue even if there are other eligible consumers to deliver those messages to.
Problem conclusion
The code has been modified so that applications that consume messages via the asynchronous consume mechanism may not be added to the list of eligible waiters for a queue if they have used the MQMO_MATCH_MSG_TOKEN match option. If a message that would match the message token is already available on the queue when the MQGET occurs then it is still delivered to the client but the client asynchronous consumer is suspended and the callback will receive MQRC_MSG_TOKEN_ERROR. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.5 7.5.0.7 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
IT13527
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7241
Reported release
750
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-02-01
Closed date
2016-04-29
Last modified date
2016-04-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI61671
Fix information
Fixed component name
WMQ BASE MULTIP
Fixed component ID
5724H7241
Applicable component levels
[{"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":"7.5","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 March 2023