A fix is available
APAR status
Closed as program error.
Error description
Queue manager reported CSQ0607E, which accompanied with CSQ0215E,CSQ0214E and CSQ0607E. The dumps show subpool 2 key 7 of AMS address space and subpool 229 key 7 of MSTR address space consumed huge ABOVE storage. The LEDATA heap exception report shows that the majority of the storage is allocated from heappool 2 and consists of a very large number of small (x38) byte allocations. The memory leak can occur when using MQPUT1 with confidentiality policies.
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 2 Modification 0 and * * Release 3 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Storage leak in the xxxxAMSM address * * space, leading to symptoms that can * * include: * * - MQI calls failing MQRC_SECURITY_ERROR * * 2063 * * - CSQ0215E reporting Message Protection * * failed * * - increased CPU usage * * - Abend S878 * * - Performance degradation * **************************************************************** When protecting messages put using MQPUT1 to queues protected by a Confidentiality policy, an error can result in an area of storage being allocated during the message protection processing but not freed. Over time,the accumulation of leaked storage can result in a degradation in performance, and eventual storage exhaustion. This Short on Storage SOS condition leads to MQI calls failing and abends reporting the storage shortage being captured.
Problem conclusion
CSQ0DLCF is changed to correctly free the leaked storage when it is no longer required.
Temporary fix
Comments
APAR Information
APAR number
PH59034
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
200
Status
CLOSED PER
PE
YesPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2024-01-05
Closed date
2024-02-08
Last modified date
2024-03-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI95605 UI95606
Modules/Macros
CSQ0DLCF
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
Fix is available
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Document Information
Modified date:
04 April 2024