PM77118: EZBITDSA( UK68305 11.151)+000084 S4C5/74FF2000

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABENDS4C5 Reason 74FF2000 (TcpitProcStackExceeded in EZBITDSA)
  can occur when multiple internal routines within EZBTCUTL are
  called that have external entry points due to slight increase
  in dynamic storage allocation from PTF UK82041.
  
  Verification Steps:
  
  - Abending DUCB ( IP TCPIPCS DUAF ) will have a calling
      module sequence as follows:
  291CF6F0 24464000 244641A0 00ED6080 0250 WSWEBP10
  004C5000 Ab Iu Su
  RSA  244646E8  Prev 00000000  Next 244647A0  Mod EZBITDUM
  RSA  244647A8  Prev 244646E8  Next 20C7B038  Mod EZBTCRD:
  RSA at 20C7B040 is outside address range of DUSA
  RSA  20C7B040  Prev 244647A8  Next 20C7C5C0  Mod EZBTCRD:
  RSA  20C7C5C8  Prev 20C7B040  Next 20C7C9C0  Mod EZBTCRDG
  RSA  20C7C9C8  Prev 20C7C5C8  Next 20C7DB50  Mod EZBTCUTL
  RSA  20C7DB58  Prev 20C7C9C8  Next 20C7ECE0  Mod EZBTCUTL
  RSA  20C7ECE8  Prev 20C7DB58  Next 00000000  Mod EZBTCUTL
  
  
  
  
  
  
  
  
  Additional Symptom(s) Search Keyword(s):
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release(s) 13 IP          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend4C5 rsn74ff2000 in EZBITDSA with   *
  *                      PM71528/UK82041 installed.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Abend4C5 rsn74ff2000 in EZBITDSA with PM71528/UK82041 installed.
  
  The error occurs on a local TCP connection when SMFCONFIG
  TCPTERM and/or NETMONITOR TCPCONNSERVICE is configured in the
  profile.  A timing condition exists where the packet flow on a
  local TCP connection finds one end of the connection has been
  deleted.  This causes a RST packet to be generated and sent
  back to the TCP inbound processing path under the same unit
  of work.  When the RST packet is processed an external call to
  EZBTCUTL is made to clean up resources associated with the
  connection.  During the clean up process an external call to
  another routine in EZBTCUTL is made to generate a termination
  record.  While creating the termination record an external call
  to another routine in EZBTCUTL is made to format the data.
  A call is then made to EZBITSCB to record the termination
  record but the dynamic storage is exhausted.  A call is made
  to EZBITDSA to expand the dynamic storage and the S4C5 abend
  is issued because there is already one expansion associated
  with this unit of work.
  The code changes in PM71528 increased the dynamic storage
  requirements for all external calls to EZBTCUTL by a small
  amount.  The dynamic storage requirements in the error path
  prior to PM71528 was very close to the limit.  The increase
  in dynamic storage by PM71528 and the 3 external calls to
  EZBTCUTL in the error path caused the dynamic storage to
  exceed the limit.
  +-------------------------------------------------------------+
  + Please check our Communications Server for OS/390 homepages +
  + for common networking tips and fixes.  The URL for these    +
  + homepages can be found in Informational APAR II11334.       +
  +-------------------------------------------------------------+
  

Problem conclusion

• EZBITDSA has been amended to allow an additional dynamic storage
  expansion area.
  
  * Cross Reference between External and Internal Names
  

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:

  UK90038

Modules/Macros

•    EZBITDSA EZBTCUTL TOTCPDS
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R1D0 PSY UK90038

     UP13/02/01 P F301

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.