PH68292: INCORRECTLY INITIALIZED ESTAEX PARAMETER LIST RESULTS IN THE POSSIBILITY FOR ATTLS WORKER TASKS TO RUN WITHOUT ESTAE RECOVERY.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• For an ATTLS worker task that does not have ESTAE recovery,
  if an ABEND occurs under this work unit (i.e. during TLS
  Handshake, etc.), then the ATTLS Group will fail (as per
  EZD2042I message output to SYSLOG).
  
  Typically, an ABEND in load module GSKS64 will be the trigger
  condition for this problem - symptom dump output documenting
  the ABEND will be present in the MVS SYSLOG.
  
  ATTLS group failure will result in connectivity failures for all
  subsequent traffic associated with the group. Each connectivity
  failure will have a corresponding 'EZD1286I TTLS Error' message
  with 'RC: 5018 Policy Mapping' in the MVS SYSLOG.
  
  Additionally, no dump will be captured for further diagnosis
  because ESTAE recovery was not established.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM z/OS Communications Server  *
  *                 2.5, 3.1, and 3.2 for IP: ATTLS              *
  ****************************************************************
  * PROBLEM DESCRIPTION: An ABEND occurring under a single ATTLS *
  *                      worker task can result in connectivity  *
  *                      loss for all subsequent connections     *
  *                      associated with that group.             *
  *                                                              *
  *                      Furthermore, no SVC dump will be        *
  *                      captured for the problem because there  *
  *                      is no ESTAE recovery established for    *
  *                      the task.                               *
  ****************************************************************
  * RECOMMENDATION: Apply the PTF.                               *
  ****************************************************************
  For an ATTLS worker task that does not have ESTAE recovery,
  if an ABEND occurs under this work unit (i.e. during TLS
  Handshake, etc.), then the ATTLS Group will fail, resulting in
  connectivity loss for all subsequent connections associated to
  the group. Additionally, there is no SVC dump captured to
  further diagnose the problem.
  
  The root cause for this issue is a lack of ESTAE recovery
  protecting the ATTLS worker task. This is caused by incorrect
  initialization of the input parameter list to the ESTAEX
  service at worker task creation time.
  

Problem conclusion

• ATTLS has been fixed to correctly establish ESTAE recovery.
  

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:

  UO05872 UO05873 UO05874

Modules/Macros

• EZBTLCWK
  

Fix information

• Fixed component name

  TCP/IP MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R250 PSY UO05872

     UP25/12/16 P F512 ¢

• R310 PSY UO05873

     UP25/12/16 P F512 ¢

• R320 PSY UO05874

     UP25/12/16 P F512 ¢

Fix is available

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