APAR status
Closed as program error.
Error description
Memory exceptions are reported and Failure Data Capture (FDC) records will be generated with the following call stacks: Stack 1 - most recent call at the top xruRecordThreadUsage xtrEstablishTraceStatus xtr_FNC_entry xtrAnyThreadsTracing xtrTurnOffTrace xcsDestroyThread ThreadMain Stack 2 - most recent call at the top GenerateFFST xehExceptionHandler ThreadMain
Local fix
N/A
Problem summary
**************************************************************** USERS AFFECTED: Users of IBM MQ on Windows who switch on MQ trace at the MQ 9.1.0.2 level. Platforms affected: Windows **************************************************************** PROBLEM DESCRIPTION: While uninitializing MQ data on a thread that was about to end, the MQ code freed some memory and set some pointers to null. Then when MQ entered a subroutine that ends the trace for that thread the null pointer was referenced and MQ suffered the memory exceptions described. This issue was caused by the code change for APAR IT28639 which was included in the 9.1.0.2 fix pack.
Problem conclusion
The logic in the MQ trace code was wrong. It has been corrected such that the pointer is not set to null. The subroutine mentioned therefore does not suffer the memory exception. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.1 CD 9.1.3 v9.1 LTS 9.1.0.3 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
IT29222
Reported component name
IBM MQ BASE MP
Reported component ID
5724H7271
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-05-22
Closed date
2019-07-31
Last modified date
2019-07-31
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
IBM MQ BASE MP
Fixed component ID
5724H7271
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 July 2019