A fix is available
APAR status
Closed as program error.
Error description
When the QMGR has CHADEXIT set. CHADEXIT is the the name of the channel auto-definition exit. A storage leak in QMGR can cause a delay in communication between the Transaction Processing Facility (TPF) and WMQ on Z/OS. Additional Symptom(s) Search Keyword(s): subpool 0 key 8 SP0 KEY8 fragementation
Local fix
Recycle CHIN address space.
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 0 Modification 1 and Release 1 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Increase in cpu and performance * * degradation over time, when using a * * channel auto definition exit with * * cluster channels (CHADEXIT). * **************************************************************** * RECOMMENDATION: * **************************************************************** During start up for a cluster channel, rriCallChadExit is called if the queue manager is configured with a channel auto definition exit (CHADEXIT). rriCallChadExit calls rriClusterFields to determine the name of the cluster the channel belongs to and stores the storage it acquires in MQCD.ClusterPtr. In subsequent channel start up processing rriInitExits is called to initialise any channel exits. This calls rriClusterFields again, and overwrites MQCD.ClusterPtr with the address of a second storage area containing the cluster name. When the channel terminates, the storage acquired by rriInitExit is freed, however the storage acquired in rriCallChadExit is not freed and is consequently leaked. Over time this results in increased storage usage by the channel initiator (although the leak is small - x48 bytes), and an increase in cpu usage and decrease in performance due to storage fragmentation.
Problem conclusion
rriClusterFields is updated to handle being called twice in channel startup processing, preventing the storage leak and consequent problems. 010Y 100Y CSQXREXT
Temporary fix
********* * HIPER * *********
Comments
×**** PE15/08/03 FIX IN ERROR. SEE APAR PI37337 FOR DESCRIPTION ×**** PE16/02/12 FIX IN ERROR. SEE APAR PI57113 FOR DESCRIPTION
APAR Information
APAR number
PI25795
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-09-16
Closed date
2014-10-22
Last modified date
2016-04-14
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI27234 UI22395 UI22396
Modules/Macros
CSQXREXT
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0.1","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
14 April 2016