PK17509: S878-10 ABEND OCCURS WHEN HEAP MANAGER IS ACTIVE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• On MVS (z/OS), the TSM server may be terminated with S878-10
  abend occurs when the heap manager is active. A dump of the
  TSM server address space created at the time of the abend
  revealed that an allocated memory's control block was twice
  as big. A review of the code revealed that the sizes of the
  allocated memory's header and trailer blocks were included
  twice in the actual size of the allocated memory. When a
  large number of memory allocations are active, memory can be
  exhausted resulting in the S878-10 abend and other
  out-of- memory conditions.
  
  A ZAP was developed to prevent adding the header and trailer
  blocks sizes and the results were favorable.
  
    TSM Versions Affected:
    5.2.6.x and 5.3.x servers on MVS (z/(OS)
  
    Customer/L2 Diagnostics (If Applicable):
    None
  
    Initial Impact:
    High
  
    Additional Keywords:
    None
  

Local fix

• Apply the following ZAP to the TSM server:
  
  //TSMZAP   JOB MSGLEVEL=(1,1),MSGCLASS=H,CLASS=A,REGION=4M
  //*
  //*-------------------------------------------------------------
  //* To preserve the production version of the TSM server module,
  //* make a copy of the production module prior to applying this
  //* ZAP. This is for ANRSERV/DSMSERV 5.2.6.0 and 5.3.x.
  //*
  //*  When necessary, place the saved copy of the ANRSERV/DSMSERV
  //*  module back to the production library.
  //*-------------------------------------------------------------
  //*  Purpose of this ZAP:
  //*    Prevent the allocation of memory that eventually ends up
  //*    as dead space which results in out-of-memory conditions.
  //*-------------------------------------------------------------
  //*
  //ZAP1    EXEC PGM=AMASPZAP
  //SYSPRINT DD  SYSOUT=A
  //*
  //*--------------->|||||||||||---> Replace with your library
  //*                vvvvvvvvvvv
  //SYSLIB   DD  DSN=TSM.LINKLIB,DISP=SHR
  //SYSIN    DD    *
   NAME ANRSERV ANRHEAP
   VER 00A4 41700048
  *
   REP 00A4 41700000
  *
  /*
  //
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: 5.2.7 and 5.3.2 servers on MVS.              *
  ****************************************************************
  * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 5.2.8 and 5.3.3. Note that this    *
  *                 is subject to change at the discretion of    *
  *                 IBM.                                         *
  ****************************************************************
  *
  

Problem conclusion

• The problem has been 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:

Fix information

• Fixed component name

  TSM FOR OS/390

• Fixed component ID

  5698ISMVS

Applicable component levels

• R520 PSY UK15184

     UP06/06/08 P F606

• R530 PSY

     UP

Fix is available

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