A fix is available
APAR status
Closed as program error.
Error description
After applying PM08681 several customers have reported the following abend in DFHTFIQ: DFHTF0001 An abend (code 0C4/AKEA) has occurred at offset X'058C' in module DFHTFIQ. PIDS/5655M1500 LVLS/650 MS/DFHTF0001 RIDS/DFHTFIQ PTFS/HCI6500 AB/S00C4 AB/UAKEA ADRS/0000058C Additional symptoms: DFHTFIQ is attempting to increment a storage violation count- SET_TERMINAL_FACILITY COUNT_STORAGE_VIOLATION(YES) R10 the tctte pointer contains 000A0000. With XM tracing off, module DFHZTSP is setting XM_TXN_FACILITY_TOKEN to a value of x'000A0000' a local fix for this problem is to turn on XM level 1 tracing. Second problem -------------- When installing a remote terminal using EXEC CICS CREATE or CEDA INSTALL the terminal associated with the task is not released on task termination and a hang occurs.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users with the PTF of APAR PM08681 * * applied. * **************************************************************** * PROBLEM DESCRIPTION: DFHTFIQ abends 0C4 at offset X'058C' * * when there is a storage violation in * * a routed transaction. * * A terminal hangs when running a task * * installing a remote terminal using * * CEDA or EXEC CICS CREATE. * **************************************************************** * RECOMMENDATION: * **************************************************************** There are two problems caused by code added in APAR PM08681 to clear the facility token when issuing a freemain for a surrogate terminal in the DFHZTSP SKELCOM code. In cases when the principal facility is the surrogate terminal, the SKELCOM code sets the facility token to nulls when XM tracing it turned ON. However, when XM tracing is turned OFF the facility token is set to the value within the 4 bytes at address X'00000000' This typically has a value other than nulls. If CICS detects a storage violation in task storage during task termination there is an attempt to update the TCTTE storage violation count using the invalid facility token as the TCTTE address which resulted in an abend0C4 in DFHTFIQ. When a CEDA INSTALL or EXEC CICS CREATE request is made to install a remote terminal the terminal associated with the task issuing the request hangs on task termination. In this case the facility token should not have been cleared in SKELCOM because the principal facility was the terminal associated with the CEDA or EXEC CICS request rather than the surrogate. Additional keywords: MSGDFHTF0001 DFHTF0001 TF0001 S0C4 abendS0C4
Problem conclusion
UK56576 DFHZTSP has been changed to clear the current transaction's facility token correctly when appropriate.
Temporary fix
FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PM26424
Reported component name
CICS TS Z/OS V4
Reported component ID
5655S9700
Reported release
600
Status
CLOSED PER
PE
YesPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-11-11
Closed date
2010-12-21
Last modified date
2011-01-03
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK63393
Modules/Macros
DFHZTSP
Fix information
Fixed component name
CICS TS Z/OS V4
Fixed component ID
5655S9700
Applicable component levels
R600 PSY UK63393
UP10/12/30 P F012
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:
03 January 2011