A fix is available
APAR status
Closed as program error.
Error description
The customer upgraded CICS Transaction Server to V5.1, on z/OS 1.13. Since the upgrade, a CICS to CICS connection over IPIC receives error message : DFHIS1023 10/11/2014 13:46:56 CICS1234 Conversation error (code X'061D') occurred on IPIC session /AAN in IPCONN 5678. . DFHIS4000 01/13/2015 10:03:57CICS5678 CONVERSATION FAILURE ON IPCONN 1234. SENSE CODE (X'1008600B'). MESSAGE (DFHIS1023 13/01/2015 10:04:37 CICS1234 CONVERSATION ERROR (CODE X'061D') OCCURRED ON IPIC SESSION /AAN IN IPCONN 5678.) CICS trace shows : task 58 CISR does IS 0800 ISAL ENTRY ALLOCATE_RECEIVE . IS 0801 ISAL EXIT ALLOCATE_RECEIVE/EXCEPTION NO_FREE_RECEIVE_SESSION and after about 30 retries : IS 061D ISRR *EXC* - NO_ISSB_AVAILABLE - IPCONN(5678 ) MSG_TYPE(DATA) CONVID8(CE5944ECFAD0F069) CONV_ID(00004B97) CONV_STATE(B) REQ_TYPE(LN) MSG_SEQ(000001) LIC CHAIN_SEQ(000001) TRAN(CSMI) The Server CICS ISSS.1 154230F0 IS DOMAIN CLIENT SESSION SET has all of the R.1 RECEIVE ISSBs showing as Active. All of the IPCONN RECEIVE ISSBs are showing as ACTIVE when they don't have ant task attached. Each of the ISSB has ISSB_SFP ( implicit forget pending) and a value set in ISSB_PREV_CONV_ID8. ( CONVID)
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: DFHIS1023 Conversation error * * (CODE X'61D') occurred on IPIC session * * /xxx in IPCONN xxxx. * **************************************************************** * RECOMMENDATION: * **************************************************************** CICS systems connected via MRO connection and IPIC connection. SYSB sends a DPL request over IPIC connection to SYSA and does a function shipping over MRO connection. After the task terminates, on SYSB there is a UOW left in COMMITTED state waiting FORGET flow sent by SYSA. On SYSA there is an ISSB left on he active chain. After some interval, SYSB sends a PING command to SYSA and allocates a send ISSB which happens to be the same as the ISSB used in DPL request. After the PING reply is received from SYSA, the UOW waiting FORGET flow is resolved and the ISSB is put on the free chain. However, on SYSA, when it receives the PING request, it does not allocate a receive ISSB. Instead it calls a subroutine to send the PING response directly and leaves an orphan receive ISSB on the active chain. When this happens repeatedly, they are left in this state on the active chain eventually resulting in message dfhis1023 with error code x'061D' being issued.
Problem conclusion
A new flag has been introduced in DFHISDCC to indicate that the SEND ISSB is being used by a PING command. The new flag will prevent the outstanding UOW waiting implicit forget flow to be resolved when the PING response is received. The outstanding UOW will be resolved when the SEND ISSB is used to send a user request or during IPCONN RELEASED processing, ensuring that the receive ISSB in the partner region is moved from the active to the free chain.
Temporary fix
FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PI36058
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-03-02
Closed date
2015-09-28
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:
UI26934 UI26935
Modules/Macros
DFHCIS4 DFHISAL DFHISCO DFHISCOP DFHISCU DFHISDM DFHISDUF DFHISEM DFHISEMP DFHISFS DFHISIC DFHISIF DFHISIS DFHISJU DFHISLQ DFHISLQP DFHISPH DFHISPHP DFHISPRP DFHISRE DFHISRR DFHISRRP DFHISRS DFHISRSP DFHISSR DFHISST DFHISTRI DFHISUE DFHISXF DFHISXM DFHISXS DFHISZA DFHMIRS
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
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:
29 July 2020