PH12926: ADFZCC IPVSERVER USES A VERY LOW 'MAXIMUMBACKLOG' SETTING

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The IPVServer IPVSRV1 job is configured to specify a
  MaximumBacklog value of 1.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of ADFzCC common server.           *
  ****************************************************************
  * PROBLEM DESCRIPTION: ADFzCC common server runs with a        *
  *                      TCP/IP listener backlog of 1. This      *
  *                      value is too low and can result in      *
  *                      connection requests being rejected,     *
  *                      and consequently client connection      *
  *                      failures, when a high number of         *
  *                      requests occur concurrently.            *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  The ADFzCC common server has a default backlog of 1 for incoming
  TCP/IP connection requests. This number is too low for
  situations where multiple client connection requests occur
  concurrently. If the backlog is already full of waiting clients,
  subsequent client connection requests will be rejected by
  TCP/IP.
  

Problem conclusion

• The ADFzCC common server TCP/IP listener backlog has been
  increased to 10 which should be sufficient to handle situations
  of multiple concurrent connection requests
  

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:

Modules/Macros

• IPV0LVL  IPV0LVLJ IPV0LVLK IPVBKXML IPVCMENU IPVCONFG IPVCTRC
  IPVEPRCV IPVEPSND IPVLANGO IPVLANGP IPVLANGX IPVLANGZ IPVMAIN
  IPVMAINZ IPVMKDIR IPVMOD24 IPVMOD4Z IPVPH003 IPVPH004 IPVPH006
  IPVPH007 IPVPI003 IPVPI004 IPVPI006 IPVPOPS2 IPVPOPS3 IPVRSETN
  IPVSETNG IPVSRV   IPVSRV1  IPVSRVRF IPVSRVSF IPVSRVSL
  

Fix information

• Fixed component name

  ZPDTOOLS CCOMP(

• Fixed component ID

  5655IPV00

Applicable component levels

• R180 PSY UI63549

     UP19/06/13 P F906

Fix is available

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