A fix is available
APAR status
Closed as program error.
Error description
When a conversation ended, xcsFreeOwnedBuffers detected that the conversation owned a buffer that had not been freed and issued CSQX053E message. The CSQSNAP shows: * X...XFFSxcsFreeOwnedBuff* *ers.............MOVR.........!..* *X...XINS........Owner didn't fre* *e their buffers.................* *................................* Each time the conversation was reused, when it ended the same buffer was detected and the FFST was issued again.
Local fix
Restarting the chinit will clear the error state.
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 8 * * Release 0 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: During end of conversation processing, * * we attempt to locate conversation * * buffers which haven't been freed. If * * we detect any, we issue a snap dump to * * store their contents in a CSQSNAP * * dataset. The logic in the code results * * in the same buffer being dumped each * * time the conversation is reused. * **************************************************************** When determining whether to issue an FFST and a snap dump for a conversation buffer, there is not a check for whether the buffer has been dumped previously. This can result in repeated FFSTs being issued for the same buffer each time the conversation is reused. This could give the impression of a reoccurring problem rather than a single instance of a buffer not being freed.
Problem conclusion
The code has been changed to not issue an FFST for conversation buffers which have already been dumped. Additionally, when a conversation buffer is detected as having not been freed, a system dump is taken in addition to the snap dump.
Temporary fix
Comments
APAR Information
APAR number
PH10645
Reported component name
IBM MQ Z/OS V8
Reported component ID
5655W9700
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-04-05
Closed date
2020-06-22
Last modified date
2020-09-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PH23759 UI70159
Modules/Macros
CSQXBPC2 CSQXBPCS CSQXXFST
Fix information
Fixed component name
IBM MQ Z/OS V8
Fixed component ID
5655W9700
Applicable component levels
R000 PSY UI70159
UP20/08/08 P F008
Fix is available
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Document Information
Modified date:
03 September 2020