PM61962: MULTIPLE ABEND ASRAS IN EYU0WNAL

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Error Description￘
  After running for a while, multiple DFHAP0001 program checks
  (abend s0CC) occurred in CPSM environment.  The abending task
  was as follows:
  
    Meth Load-Pt  OPB      OSSB     Stack    Mal      MODB
    XLOP 000AAD28 229575B8 22957740 22957768 00000000 2120DE60
    WDTR 21FEB3C0 229575B8 22957740 229578B0 22957268 21219960
    WASV 21FF1098 229575B8 22957740 22957F88 22957A00 21219960
    WNAL 21FED560 229575B8 22957740 22958360 22958188 21219960
  
  
  This task abended 0CC (Exponent-Overflow Exception) in EYU0WNAL
  with the following psw and regs:
  
    PSW:  078D6000 A1FEDD52   IL  4  IC  0C
    GR 0-3 00000001  00000015  01704C00  21FED5A0
       4-7 208EFB90  01704D20  2255E438  2255EA44
       8-B 2255E148  01704B80  21FEE5A0  208EFA10
       C-F 22958188  22958360  00000000  00000017
    AR 0-3 00000000  00000000  01FF0030  00000000
       4-7 00000000  00000000  00000000  00000000
       8-B 00000000  01FF0030  00000000  00000000
       C-F 00000000  00000000  01FF0030  00000000
  
  The abend was occurring on an MD instruction:  6C00 9038 with
  Reg9 being the address of the (last) WAOW the MAS and offset 38
  the WAOW_ABND_FACTOR value.
  
  
  
  Additional Symptom(s) Search Keyword(s): KIXREVGJT
  

Local fix

• Local Fix￘
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICSPlex SM V4R1M0 and V4R2M0 Users      *
  ****************************************************************
  * PROBLEM DESCRIPTION:    You are using CPSM's Workload Man-   *
  *                      agement with the Goal algorithm in a    *
  *                      large CICSplex spanning several LPARs.  *
  *                      You receive repeated abend ASRA (S0CC,  *
  *                      floating point overflow) in one or more *
  *                      routing regions.  The abends occur in   *
  *                      module EYU0WNAL (WNAL - Process WLM     *
  *                      Algorithm) at or near offset +7F2.      *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF that resolves this    *
  *                 APAR, all MASes configured as WLM Routing    *
  *                 Regions must be recycled to pick up the new  *
  *                 code.  Note that the MASes do not need to    *
  *                 be brought down and restarted at the same    *
  *                 time.                                        *
  ****************************************************************
     When evaluating target regions for routing, module WNAL
  loops through initialized WLM AOR Work Elements (WAOWs) cal-
  culating the routing weight for each target region.  When
  using the Goal algorithm, targets are classified according to
  whether they are considered best able to meet service goals,
  executing in the best CEC, and executing in a CEC other than
  the best.  The base weight for targets not executing in the
  best CEC is stored in floating-point register 6.  After the
  base weight is determined and a factor is applied for abend
  compensation, the final weight is stored in the WLM Scope
  Vector Element (WSVE) for the region as both a normalized
  floating point value and as an integer.  A logic error in the
  conversion to integer resulted in the base weight for regions
  not executing in the best CEC being overlaid.  This value is
  then used as the base weight for the next region in the WAOW
  array and the process repeats.  If enough target regions are
  executing in CECs other than the best, the accumulated error
  might result in an exponent overflow when applying the abend
  compensation factor, or during the integer conversion.
  

Problem conclusion

•    Module EYU0WNAL was modified to avoid overlaying the base
  weight for target regions not executing in the best CEC.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK79270 UK79271

Modules/Macros

•    CJA0WNAL CJB0WNAL CJC0WNAL EYU0WNAL
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R60M PSY UK79270

     UP12/06/07 P F206

• R70M PSY UK79271

     UP12/06/07 P F206

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.