A fix is available
APAR status
Closed as program error.
Error description
Soft Abend LDD003 occurs during a diagnose X'7C' PRESENT when the logical subchannel is still busy from a previous PRESENT. During PRESENT processing HCPLDDPR calls HCPLSMUU to store status into the logical SCHIB. HCPLSMUU gives RC=4 because the logical subchannel is still active. This leads to soft abend LDD003. In many cases more time is needed for the logical subchannel to clear from the earlier PRESENT.
Local fix
N/A
Problem summary
**************************************************************** * USERS AFFECTED: All users of z/VM Logical Device Support * * Facility. * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** Abend LDD003 (soft) occurs during a Diagnose X'7C' PRESENT subfunction when HCPLSMUU gives RC=4 back to HCPLDDPR. This return code indicates that the unit status could not be updated in the logical subchannel because the device is still busy from a previous PRESENT.
Problem conclusion
HCPLDDPR was changed to give CC=2 and RC=2 from a Diagnose X'7C' PRESENT subfunction when HCPLSMUU gives RC=4, unless this occurs on 2 consecutive PRESENTs. Soft Abend LDD003 will occur when HCPLSMUU gives RC=4 on the second consecutive PRESENT.
Temporary fix
FOR RELEASE VM/ESA CP/ESA R640 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE FOR RELEASE VM/ESACP/ESAR710 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE
Comments
APAR Information
APAR number
VM66258
Reported component name
VM CP
Reported component ID
568411202
Reported release
640
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-02-18
Closed date
2019-07-08
Last modified date
2021-06-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35489 UM35490
Modules/Macros
HCPLDD HCPLDDBK
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
Fix is available
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Document Information
Modified date:
30 June 2021