OA42405: ABEND0C4 IEAVELK AFTER IXLM2VTR ATTEMPTS TO OBTAIN IXLSHELL LOCK

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• IXLM2VTR calls lock manager to obtain the IXLSHELL lock.  The
  IXLSHELL lockword is in DREF storage.  The lock manager page
  faults on the lockword and since RSM requires locks to proceed,
  lock manager recursion results.  Lock manager can not be called
  recursively; this may result in savearea corruption or other
  unpredictable results.  The lock is granted but on return the
  saved registers are not those from the IXLM2VTR call so the
  abend0C4 occurs.
  
  
  Verification:
  System trace table will show a page fault by a CS instruction at
  IEAVELK +6E on a IXLSHELL lockword immediately before the
  abend0c4 (eyecatcher VTHT will likely appear on the page).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Installations exploiting parallel sysplex at *
  *                 z/OS V1R10 (HBB7750) and above.              *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND0C4 in IEAVELK attempting to trace *
  *                      a vector operation.                     *
  *                                                              *
  *                      SYSPLEXDS                               *
  ****************************************************************
  * RECOMMENDATION: Install the applicable PTF on each system in *
  *                 the sysplex.  A rolling IPL is sufficient to *
  *                 activate the fix.                            *
  ****************************************************************
  ABEND0C4 in spin lock manager IEAVELK when a DREF page fault
  must be resolved to update the lockword that serializes tracing
  of the current vector operation (IXLM2VTR).  Lockwords cannot
  reside in DREF storage.
  

Problem conclusion

• In method ixlyvtht_Obtain(), change the subpool in which the
  vector tracing lockwords reside from 247 (DREF) to 239 (fixed).
  

Temporary fix

Comments

APAR Information

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

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

  UA69391 UA69392 UA69393 UA69394 UA69395

Modules/Macros

• IXLI1SIN
  

Fix information

• Fixed component name

  CROSS SYS.EXT.S

• Fixed component ID

  5752SCIXL

Applicable component levels

• R770 PSY UA69393

     UP13/06/19 P F306

• R780 PSY UA69394

     UP13/06/19 P F306

• R790 PSY UA69395

     UP13/06/19 P F306

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.