OA46923: SMSVSAM STORAGE LEAK CAUSED BY IGWMXMSG BLOCK IN SP229 KEY5

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After an abend0c4 in MMF cleanup (module IGWMCNUP) a steady
  storage increase in the SMSVSAM address space was encountered in
  SP229 key5. After a couple of days SMSVSAM finally ran out of
  private storage below and above the line and terminated with an
  abend0c6.
  
  The storage in SP229 Key5 is filled with control blocks
  for MMF message processing, which have eyecatchers like
  IGWMXMSG and IGWMCDTA.
  
  The reason for the storage increase is, that the initial S0C4
  disabled MMF, nevertheless the storage for MMF message
  processing is allocated, but not released anymore.
  
  Additional symptoms are:
  
  Abend0f4 rsn253DC003 in IGWFVGTM
  Abend0f4 rsn6521FB2C in IGWSGMSG
  Abend0f4 rsn6D7D2714 in IGWFCPER
  

Local fix

• Restart SMSVSAM
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of VSAM RLS                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Storage leak in private SP229 Key5 if   *
  *                      RLS Measurement Management Facility     *
  *                      (MMF) is disabled after an ABEND when   *
  *                      another system attempts to collect      *
  *                      statistics.                             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  If the RLS Measurement Management Facility (MMF) is
  disabled due to an ABEND in the MMF path, subsequent requests
  from other systems to collect statistics data will result in
  a memory leak because the message block is not freed.
  

Problem conclusion

• Updated MMF code to properly free message block when MMF is
  disabled and handling a request for statistics from another
  system.
   KEYWORDS: RLSPSP/K
  

Temporary fix

• *********
  * HIPER *
  *********
  WORKAROUND: RESTART SMSVSAM TO RE-ENABLE MMF.
  

Comments

APAR Information

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

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

  UA78717 UA78718 UA78719

Modules/Macros

• IGWMREQP
  

Fix information

• Fixed component name

  VSAM REC LEV SH

• Fixed component ID

  5695DF122

Applicable component levels

• RD10 PSY UA78717

     UP15/10/02 P F510 Ž

• R210 PSY UA78718

     UP15/10/02 P F510 Ž

• R220 PSY UA78719

     UP15/09/24 P F509 Ž

Fix is available

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