PQ04331: ABEND878-10 ACB CONTROL BLOCK BUILDUP IN SUBPOOL 0 KEY 6. CHUNKSOF X'2000' BYTES ALLOCATED W. FQE OF X'10' 97/09/02 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ACB_TYPE Control Block storage buildup in Subpool 0 Key 6,
  eventually leading to an out of storage condition and an
  Abend878-04.  The dump submitted is a console dump of the TCPIP
  address space (not an Abend878 dump), which shows the storage
  buildup.  In the dump, approximately 24 meg is allocated to the
  ACBs in x'2000' byte chunks, with associated FQEs of x'10'
  bytes - and continuing to grow.
  .
  VERIFICATION STEPS:
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of TCP/IP for MVS                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: ACB buildup eventually causing          *
  *                      Abend878-04.                            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The ACB pool is slowly being depleted because the ACBs that are
  used are not being freed. This will eventually lead to an out of
  storage condition which results in Abend878-04.
  

Problem conclusion

• TCP/IP was changed to first verify that we have a HIPPI ACB
  using subtasking before we set the DontFreeAcb to true.
  
  * Cross Reference between External and Internal Names
  EZABB038 (TCPUP   )
  

Temporary fix

• Temporary fix can be obtained from level 2.
  

Comments

• ×**** PE97/07/29 PTF IN ERROR. SEE APAR PQ06911  FOR DESCRIPTION
  

APAR Information

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

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

  UQ06504

Modules/Macros

• EZABB038
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R320 PSY UQ06504

     UP97/07/14 P F707 «

Fix is available

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