A fix is available
APAR status
Closed as program error.
Error description
The customer CICS 5.1 region experienced multiple 878-00C abends during RACF processing of a locate request for a user entry. The DFHXS0001 messages state the abend occurred in module DFHXSPW. 878-00C indicates an LSQA shortage. . After taking a look at the doc and can see the cause of the storage leak. It occurs when a thread (in this case CICS transaction CKBP) ends without closing all of its queues. Close-all-handles processing will close all of the open queues, but any AMS QInfoObject control blocks are not released, resulting in the storage leak seen here. . Additional Symptom(s) Search Keyword(s): . sp230 k7 key7 B8 ABEND878 878 To troubleshoot, we asked for MSTR Internal trace. /cpf RECOVER QMGR(TUNE TABMAXBLK 20480) /cpf SET SYSTEM TRACTBL(999) . This storage obtain requested x'518' bytes out of subpool 230 k 7 and was passed address 59AE50B8 which has eyecatcher CSQ0CQNF. This was issued from address 22477580, browsing storage, backing up from this eyecatcher we found that it is an MQ module- CSQ0COPN: . |x...xy..x4..CSQ0COPN2014090211.5|
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 8 * * Release 0 Modification 0 * * using Advanced Message Security (AMS). * **************************************************************** * PROBLEM DESCRIPTION: Application that MQOPEN an AMS * * protected queue and it does not MQCLOSE * * the queue result in AMS QInfo control * * blocks not released (leaked). * * * * In CICS applications this can result in * * the CICS region terminating due to LSQA * * storage shortage after generating * * 878-00C abends. * **************************************************************** The end of thread processing in CSQMCALH does not free AMS QInfo blocks left when MQCLOSE is not invoked to close AMS protected queues.
Problem conclusion
CSQMCALH now frees AMS QInfo blocks.
Temporary fix
Comments
×**** PE18/03/05 FIX IN ERROR. SEE APAR PI94647 FOR DESCRIPTION
APAR Information
APAR number
PI86583
Reported component name
WMQ AMS V8
Reported component ID
5655AMS00
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-08-30
Closed date
2017-10-30
Last modified date
2020-03-24
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI87697 UI51525
Modules/Macros
CSQ0CACB CSQ0COPN CSQ0DPCS CSQMCALH
Fix information
Fixed component name
WMQ Z/OS 8
Fixed component ID
5655W9700
Applicable component levels
R000 PSY UI51525
UP17/12/16 P F712 ¢
Fix is available
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Document Information
Modified date:
24 March 2020