A fix is available
APAR status
Closed as program error.
Error description
During COBOL runtime thread termination in a multithreaded environment, IGZXWAIT is repeatedly driven waiting on a state that doesn't come to pass.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: Users of Enterprise COBOL 5 and later * * releases running programs which have * * QSAM or VSAM I/O in a multithreaded * * environment. * **************************************************************** * PROBLEM DESCRIPTION: In a multithreaded environment where * * COBOL programs have QSAM or VSAM I/O, * * the application hangs during thread * * termination (IGZCEV24). The hang starts * * with IGZETHT and continues with * * repeated invocation of IGZXWAIT. * **************************************************************** * RECOMMENDATION: Install the provided PTF. * **************************************************************** During the thread termination (IGZCEV24), COBOL Runtime repeatedly attempts to obtain a mutex lock which was previously destroyed, and it leads to a hang. COB0501T/K COB0502T/K COB0601T/K COB0602T/K COB0603T/K
Problem conclusion
The error in the COBOL Runtime has been corrected. Logic has been added to the runtime to detect validity of a mutex before attempting to obtain a lock to fix the hang. Also if there are other Runtime errors due to an invalid mutex, it will lead to an ABEND caused by an incorrect address of 0xC4C9C5F1 (hex value of a 'DIE1' EBCDIC string). If the ABEND occurs, contact IBM for assistance.
Temporary fix
Comments
APAR Information
APAR number
PH43756
Reported component name
LE ENT COBOL LI
Reported component ID
568819812
Reported release
7D0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2022-01-31
Closed date
2022-02-22
Last modified date
2022-03-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI79452 UI79453 UI79454
Modules/Macros
IGZCEV4 IGZCMGEN IGZCMGUE IGZLLIBV IGZXAPI IGZXCA31 IGZXCDA IGZXD24 IGZXDMR IGZXJNI2 IGZXLPIO IGZXLPKA IGZXLPKB IGZXLPKC IGZXLPKD IGZXLPKE IGZXLPKF IGZXLPKG IGZXPK2
Fix information
Fixed component name
LE ENT COBOL LI
Fixed component ID
568819812
Applicable component levels
R7B0 PSY UI79452
UP22/03/01 P F202
R7C0 PSY UI79453
UP22/03/01 P F202
R7D0 PSY UI79454
UP22/03/01 P F202
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.
[{"Line of Business":{"code":"LOB35","label":"Mainframe SW"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SS6SG3","label":"Enterprise COBOL for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7D0"}]
Document Information
Modified date:
02 March 2022