A fix is available
APAR status
Closed as program error.
Error description
CSQX111E xxx CSQXDISP User channel exit error, TCB=008BBA6 reason=0C4000-00000010 Change team found the 0C4 occurs after the fix for PI25795 when a cluster-sender is started due to a copy of the channel being taken from the cluster cache which may have ClusterPtr set to a residual value.
Local fix
Backoff the ptf for PI25795
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 0 Modification 1 and Release 1 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: After application of the PTFs for APAR * * PI25795 (UI22395 or UI22396), starting * * an auto-defined cluster channel after * * only the channel initiator has been * * restarted, can result in an 0C4 abend * * when a Channel Auto-Definition (CHAD) * * Exit is used. * **************************************************************** * RECOMMENDATION: * **************************************************************** APAR PI25795 corrected a storage leak when a CHAD exit is defined (CHADEXIT queue manager attribute set). However a logic issue exists in the case where the channel definition is read from the cluster cache after the channel initiator has been restarted (without the queue manager being restarted), the value for the list of clusters for the channel is not recalculated, allowing the CHAD exit and the relevant processing to dereference an invalid pointer address, resulting in an 0C4 abend.
Problem conclusion
The processing when only the channel initiator is restarted has been altered to clear the ClusterPtr, which will result in the ClusterPtr being recalculated the next time the auto-defined cluster channel is started. 010Y 100Y CSQXREXT CSQXRFXC CSQXRMAS CSQXRMSS
Temporary fix
Comments
APAR Information
APAR number
PI37337
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED PER
PE
YesPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-03-18
Closed date
2015-08-24
Last modified date
2015-11-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI46158 UI30447 UI30448
Modules/Macros
CSQXREXT CSQXRFXC CSQXRMAS CSQXRMSS
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
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Document Information
Modified date:
03 November 2015