A fix is available
APAR status
Closed as program error.
Error description
Error Description On a system running with a IEASYSxx MAXCAD= parameter specification greater than 125 and using parameter OSPROTECT=1, the use of an ALET for a common area dataspace may incorrectly result in an abend0E0-2A or other alet related reason code. Known Impact This may result in errors trying to read or write from a common area dataspace. Verification Steps Running with OSPROTECT=1 IEASYSxx MAXCAD > 125 MAXCAD specification can be seen via IPCS IP CBF SVT and locating field MCADS.... 125. If this field is greater than x'7C' this may describe your issue. This error will also only occur when SVTNALV is identical to ASSBPALV. If both of these conditions occur and an abend0E0 occurs this may describe the issue.
Local fix
Change IEASYSxx MAXCAD= specification to a number lower than 120. The RSM_MAXCADS health check can be used to help determine an appropriate MAXCAD setting and if a value lower than 120 is appropriate. PE information: Users Affected: Customers running with the following environment: - HBB7790 PTF for OA55240 (UA96468) - HBB77A0 PTF for OA54807 (UA96477) - HBB77B0 PTF for OA55233 (UA96475) - AND specifying IEASYSxx parameters: MAXCAD >= 124 OSPROTECT = 1 User Impact: ABEND0E0-2A for an ALET for a common area dataspace (CADS). IEASYSxx MAXCAD >= 124 and OSPROTECT = 1 have to be specified. User resolution: Apply OA56775's PTFs as the apar is already closed.
Problem summary
**************************************************************** * USERS AFFECTED: * * Users running z/OS HBB7790 and above * * with IEASYSxx MAXCAD >= 124 and * * IEASYSxx OSPROTECT=1 specified, and * * with the following service: * * * * OA55240: 790 PTF UA96468 * * OA54807: 7A0 PTF UA96477 * * OA55233: 7B0 PTF UA96475 * **************************************************************** * PROBLEM DESCRIPTION: * * Abend0E0-2A for an ALET for a * * common area dataspace (CADS) when * * MAXCAD >= 124 is specified along * * with OSPROTECT=1 (with PTFs for * * OA55240 or OA54807 or OA55233 * * applied). * **************************************************************** * RECOMMENDATION: * **************************************************************** Specifying MAXCAD >= 124 causes the null access list area to span a page, but the second page was not correctly backed by real storage. So when a CADS ALET is used to an ALE on the second page, an abend0E0-2A can occur because the backed real storage for the second page was not contiguous with the first page of the null access list area.
Problem conclusion
Fixed the null access list area to be correctly backed by 2 contiguous real pages when MAXCAD >= 124 is specified with OSPROTECT=1.
Temporary fix
Comments
APAR Information
APAR number
OA56775
Reported component name
SUPERVISOR CONT
Reported component ID
5752SC1C5
Reported release
7A0
Status
CLOSED PER
PE
YesPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-01-15
Closed date
2019-03-12
Last modified date
2019-04-08
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UA98747 UA98749 UA98750
Modules/Macros
IEAVNP09
Fix information
Fixed component name
SUPERVISOR CONT
Fixed component ID
5752SC1C5
Applicable component levels
R790 PSY UA98750
UP19/03/27 P F903
R7A0 PSY UA98749
UP19/03/27 P F903
R7B0 PSY UA98747
UP19/03/27 P F903
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:
08 April 2019