PK90545: CONNECTIONS BETWEEN LBADV AND LBAGENT ARE DROPPED UNEXPECTEDLY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• At a particular time, there is an abrupt disconnection between
  LBADV and ABAGENT throught all sysplexes.  Below are some
  relevant messages from the disconnection:
  
  BPXF024I (BPXOINIT) Jun 20 23:27:38 MHPF lbadv 65640 : ERROR 785
  :002:lm_zap_receive_decode_validate:Timed out waiting to receive
  rest of ZAP message
  
  EZD1262I LBADV AGENT CONNECTION FROM 10.223.255.245 IS NO LONGER
  ACTIVE
  
  EZD1260I LBAGENT CONNECTION TO ADVISOR 10.223.253.153 IS NO
  LONGER ACTIVE
  

Local fix

• None.  The LBADV and LBAGENT will reconnect quickly.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release(s) 10, and 11     *
  *                 IP: Load Balancing Advisor/Agent             *
  ****************************************************************
  * PROBLEM DESCRIPTION: Connections between LBADV and LBAGENT   *
  *                      are dropped unexpectedly                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Connections between LBADV and LBAGENT are dropped unexpectedly.
  The problem appears as a time out across all currently
  established connections between the LBADV and the LBAGENT.
  Recovery occurs quickly and the connections are reestablished.
  The problem is in the calculation of the time out value where
  a multiplier of 100 caused the variable to overflow.
  +-------------------------------------------------------------+
  + 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

• Utility code to calculate the time out value was modified.
  
  * Cross Reference between External and Internal Names
  EZBLAZAP (LAZAP   )  EZBLCUTI (LCUTIL  )  EZBLDSSP (LDSASP  )
  EZBLMSAS (LMSASP  )  EZBLMZAP (LMZAP   )  EZBLAZAP (LAZAP   )
  EZBLCUTI (LCUTIL  )  EZBLDSSP (LDSASP  )  EZBLMSAS (LMSASP  )
  EZBLMZAP (LMZAP   )
  

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:

  UK48656 UK48657

Modules/Macros

• EZBLAZAP EZBLCUTI EZBLDSSP EZBLMSAS EZBLMZAP
  LCUTIL
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R1A0 PSY UK48656

     UP09/08/19 P F908

• R1B0 PSY UK48657

     UP09/08/19 P F908

Fix is available

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