OA47107: FIXED CSM DATASPACE STORAGE LEAK WHEN USING IQDIOMULTIWRITE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Fixed CSM dataspace storage leak when using IQDIOMULTIWRITE
  on GLOBALCONFIG statement.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release(s) 13 IP:         *
  *                 HiperSockets with zIIP multiwrite enabled    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Fixed CSM dataspace storage leak        *
  *                      when using HiperSockets multiwrite      *
  *                      and CPU cycles are displaced on a       *
  *                      zIIP.                                   *
  ****************************************************************
  * RECOMMENDATION: Apply this PTF along with the PTF PI35004    *
  ****************************************************************
  IUTLLCIZ is incorrectly handling data when current thread
  is already operating on a zIPP. If smaller messages were
  chained with larger messages then the earlier smaller
  messages were lost. This causes a fixed CSM dataspace storage
  leak.
  

Problem conclusion

• Change hipersockets logic to correctly handle conditions
  where both small and large messages are chained in the
  same outbound data stream. A storage leak was occurring
  when this condition occurred and the thread passed to
  the Hipersockets DLC interface  interpreter (IUTLLCIZ) is
  already operating on a zIIP.
  

Temporary fix

Comments

APAR Information

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

  OA46837

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

  UA76471

Modules/Macros

• ISTLLCHI ISTRPH   IUTLLCIZ
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R1D0 PSY UA76471

     UP15/03/13 P F503

Fix is available

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