A fix is available
APAR status
Closed as program error.
Error description
During CHINIT shutdown that task issues MQRC 2202 (ie. MQRC_CONNECTION_QUIESCING) The CHINIT generates dump title ABN=0C4-00000011,C=R3600.710.CHIN,M=CSQXDISP,LOC=CSQXRCTL. CSQXRERR+004CA indicating the pointer to pErrorInfo references unavailable storage. Change Team finds this abend occurs when issuing a message for a held conversation (an incoming connection has been blocked by the listener due to a BLOCKADDR CHLAUTH rule and the connection is held for 30 seconds before the error is reported and the connection terminated). During that time period the CHINIT begins shutdown, causing the listener to end and its errorInfo control block to be freed. However, the held conversation still refers to this errorInfo control block and the abend occurs when attempting to use it to issue the error message while that storage is no longer available.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 1 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Abend S0C4 may occur in CSQXRERR during * * shutdown of the channel initiator if a * * blocked channel is attempting to * * connect. * **************************************************************** * RECOMMENDATION: * **************************************************************** If a channel that matches a CHLAUTH BLOCKADDR rule is attempting to connect at the same time as the channel initiator is shutting down, an S0C4 abend may occur in CSQXRERR as some storage that is being used by the blocked channel may be released when the listener task terminates.
Problem conclusion
Processing has been amended to ensure that the storage used by the blocked channel remains available, even if the listener or channel initiator is terminated during the connection process. 100Y CSQXRMRS
Temporary fix
Comments
APAR Information
APAR number
PI63409
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-06-01
Closed date
2016-06-24
Last modified date
2016-08-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI38923
Modules/Macros
CSQXRMRS
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
R100 PSY UI38923
UP16/07/28 P F607
Fix is available
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Document Information
Modified date:
02 August 2016