A fix is available
APAR status
Closed as program error.
Error description
The initial problem report was that an indexed queue experienced an ABEND5C6-00C93100 ( CSQI_KEYED_READ_FAILURE ) in CSQIMGE1. An IKR control block existed for the message being gotten at the time of the abend, however the key in the IKR did not match with the value in the message on the associated IRH9 page. The page had been reused. Another symptom was an unexpected MQRC 2033 MQRC_NO_MSG_AVAILABLE for a message that should have been available on the queue. The page reuse could also happen for a non-indexed queue. Because the symptom may occur hours after the problem initially occurs, additional coding is needed to catch the page reuse at the time it initially happens and help find the root cause of the problem. Additional Symptom(s) Search Keyword(s): 5C6 00E7014F ABEND5C6 ABENDS5C6 S5C6 S05C6 00C93100 2195 MQRC_UNEXPECTED_ERROR CSQWDPRD DMC bad findpag
Local fix
CLEAR QLOCAL can be used to clear the message from the queue.
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Additional checking for unexpected page * * reuse. * **************************************************************** * RECOMMENDATION: * **************************************************************** If IRH9 pages used to storage messages are unexpectedly reused (a situation which should not occur), there is a possibility that incorrect data could be returned.
Problem conclusion
Additional defensive checks are added to CSQIMGE9 to detect unexpected IRH9 page reuse. When an IRH9 page is detected as having been incorrectly reused, abend 5C6-00C90D06 will be issued and the MQGET call will return MQRC_UNEXPECTED_ERROR (MQRC 2195). 100Y CSQIMGE9
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PI26733
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2014-09-30
Closed date
2014-10-22
Last modified date
2014-12-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI27496 UI22397
Modules/Macros
CSQIMGE9
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
R100 PSY UI22397
UP14/11/13 P F411
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":"7.1","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
01 December 2014