A fix is available
APAR status
Closed as program error.
Error description
ABEND 4C5/744A2706 in module EZBTCRD results from TCPIP's failed attempt to set the delayed ACK timer. Secondary symptoms are (1) ABEND4C5 reason code 74F52001 in EZBITKOB+x'750' after EZBIFQTO, the query arp info timer routine in EZBIFIND, attempts to get an exclusive lock on the ATTLK, and (2) ABEND0C4 PIC 11 in EZBAFCAL's EZBAFTIM (AFPA (adaptive fast path architecture) cache manager timer) routine, at offset x'451A' in EZBAFCAL. In each of the three cases, bad parameters are being passed to the timer routines.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of the IBM Communications Server * * for z/OS Version 1 Release 12 IP: TCPIP * **************************************************************** * PROBLEM DESCRIPTION: EZBTCRD tried to set a timer which is * * already set, causing a 4C5 abend. * **************************************************************** * RECOMMENDATION: Apply PTF * **************************************************************** A timer is being reset. In certain timing scenarios, the control block can be updated after the timer is already running. If the timer pops before the control block update is complete, the timer routine can be driven with incorrect parameters. This can cause 4C5 abends in the timer processing routines. +-------------------------------------------------------------+ + Please check our Communications Server for OS/390 homepages + + for common networking tips and fixes. The URL for these + + homepages can be found in Informational APAR II11334. + +-------------------------------------------------------------+
Problem conclusion
TCPIP is changed to serialize the updating of the timer control block prior to the timer being set. * Cross Reference between External and Internal Names
Temporary fix
Comments
APAR Information
APAR number
PI16435
Reported component name
TCP/IP V3 MVS
Reported component ID
5655HAL00
Reported release
1C0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2014-04-21
Closed date
2014-05-20
Last modified date
2014-08-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI18159
Modules/Macros
EZAFPCKT EZAPINIT EZBIFIND EZBIFIUT EZBIPIGM EZBIPINB EZBIPRHD EZBIPRTE EZBISADD EZBISDRF EZBISPTU EZBRWWRI EZBTCRD EZBUDEET EZBUDWRT EZBXFTMR EZBXFUTL EZBXFUT3 EZBX6UTL EZBX6UT3 EZB6PEPR EZB6PMLD EZB6PRTE EZB6PRT2 ITTIMER
Fix information
Fixed component name
TCP/IP V3 MVS
Fixed component ID
5655HAL00
Applicable component levels
R1C0 PSY UI18159
UP14/07/03 P F407
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 August 2014