A fix is available
APAR status
Closed as program error.
Error description
When maximum sockets is reached and there is a lot of activity processing the acquiring or releasing of IPCONNs simultaneously, the IPCONNs may get stuck in a freeing or obtaining state without any other signs of failure.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: IPCONN left in OBTAINING or FREEING * * state during ACQUIRE. * **************************************************************** * RECOMMENDATION: * **************************************************************** IPIC connections can be left stuck in OBTAINING or FREEING state when socket errors occur during acquire processing, for example when CICS reaches MAXSOCKETS. If one side of the connection has reached resync when a socket error occurs on the other side, the resulting socket close notification may be lost, leaving that side in OBTAINING waiting for a resync flow. It is also possible for the WB session token added to the IPIC process queue as a result of a notify request to be invalid by the time that the queue entry is actioned. An additional problem fixed by this apar is an 0C4 abend in DFHISIS when using an IPIC connection to TXSeries. The abend occurs because DFHISIS attempts to build a UOW header during syncpoint processing, but the required data is not available when the connection is to a system which is not CICS. Additional keywords: abend0C4 S0C4 abendS0C4 TX series IPCONN
Problem conclusion
DFHISRR and DFHISCO have been changed to handle socket close notifications during resync and to validate queued WB session tokens. DFHISIS has been altered to not build a UOW header during syncpoint processing when the remote system is not CICS. The CICS Transaction Server for z/OS Version 4 Release 1 Trace Entries book, SC34-7013-00, has been updated to add the following IS domain trace points: Point ID|Module |Level| Type |Data --------+-------+-----+------------------------+-------------- IS 0542 |DFHISCO|Exc |PARTNER NOT INSERVICE |1 ISCO | | | |parameter list --------+-------+-----+------------------------+-------------- IS 0543 |DFHISCO|Exc |PRIMARY NOT ACQUIRED |1 ISCO | | | |parameter list --------+-------+-----+------------------------+--------------- IS 0544 |DFHISCO|Exc |ISSS NOT AVAILABLE |1 ISCO | | | |parameter list --------+-------+-----+------------------------+--------------- IS 0545 |DFHISCO|Exc |ISSS NO LONGER OBTAINING|1 ISCO | | | |parameter list --------+-------+-----+------------------------+-------------- IS 0546 |DFHISCO|Exc |ISSS NO LONGER OBTAINING|1 ISCO | | | |parameter list --------------------------------------------------------------
Temporary fix
FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PK95270
Reported component name
CICS TS Z/OS V4
Reported component ID
5655S9700
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-09-02
Closed date
2009-09-25
Last modified date
2009-11-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK50539
Modules/Macros
DESISCO DESISIS DESISRR DESISTRI DESISXF DESSOCK DFHISCO DFHISCOA DFHISCOM DFHISCOP DFHISCOT DFHISDCC DFHISDCD DFHISIS DFHISISA DFHISISM DFHISIST DFHISRR DFHISRRA DFHISRRM DFHISRRP DFHISRRT DFHISTRI DFHISXF DFHISXFA DFHISXFM DFHISXFT DFHSOCBA DFHSOCBM DFHSOCBT DFHSOCK DFHSOCKA DFHSOCKJ DFHSOCKM DFHSOCKT DFHSOCKV
SC34701300 |
Fix information
Fixed component name
CICS TS Z/OS V4
Fixed component ID
5655S9700
Applicable component levels
R600 PSY UK50539
UP09/10/05 P F910
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.
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Document Information
Modified date:
04 November 2009