A fix is available
APAR status
Closed as program error.
Error description
This APAR was opened to investigate a better way to handle storage contraction for the 'CSQISTRT BLOB Object' PHB. In this case, we contracted and freed the 63Mb of storage from the PHB. This is generally an unhelpful activity, as it's unlikely that we'll ever be able to re-obtain the continuous 63MB of storage required for the PHB in scenarios where we've had to contract the PHBs due to storage exhaustion. This APAR will investigate a better way to handle contraction for this PHB.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 1 Modification 0, Release 2 * * Modification 0 and Release 3 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: In shared queues that are configured * * to offload message data to Db2, a * * 5C6-00E2000B abend can occur when * * attempting to perform operations that * * require queue manager internal storage. * **************************************************************** The queue manager's internal storage has become extremely fragmented due to an earlier storage build-up, followed by MQ storage contraction to free storage. This results in a shortage of continuous storage which can cause an abend.
Problem conclusion
The code has been changed to not contract the amount of free storage in the CSQISTRT BLOB Object pool down to 0.
Temporary fix
Comments
APAR Information
APAR number
PH44778
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2022-03-09
Closed date
2022-09-05
Last modified date
2022-10-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI82252 UI82253 UI82254
Modules/Macros
CSQISTRT
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R100 PSY UI82252
UP22/09/17 P F209
R200 PSY UI82253
UP22/09/17 P F209
R300 PSY UI82254
UP22/09/17 P F209
Fix is available
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Document Information
Modified date:
03 October 2022