PI39141: IF A ZCENTRIC WORKSTATION IN OFFLINE STATUS IS MANUALLY VARIED ACTIVE AND THEN A CP EXTEND IS RUN A PROCESSING LOOP MIGHT OCCUR

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A processing loop with thousands of event "2R" involved may
  be seen if a zcentric workstation is manually varied to ACTIVE
  status and then a CP EXTEND is run before the workstation gets
  set back to OFFLINE status.
  .
  The following recreate scenario has been used to produce the
  processing loop:
  .
  (1) The zcentric agent associated with a zcentric workstation
  definition is started (./StartUpLwa)
  (2) Some jobs are run using this zcentric workstation
  (3) The zcentric agent is shut down (./ShutDownLwa)
  (4) Additional jobs are submitted to the workstation
  (5) After some time these messages are seen in the controller
      EQQMLOG:
  EQQHT15E THE HTTP CLIENT FAILED TO PROCESS A REQUEST FOR
  DESTINATION zzzzzz
  EQQHT43I CLIENT FAILED TO OPEN. ERROR 1128 WHILE OPENING
  CONNECTION TO SERVER (HOSTNAME='n.nn.nnn.nn' -
  EQQHT43I PORT='ppppp'): 'EDC8128I Connection refused.'
  EQQWL10W WORK STATION wwww HAS BEEN SET TO OFFLINE  STATUS
  .
  (6) Within a few minutes the 5.5 dialog panel EQQMWSLL will
      show the zcentric workstation status as O (OFFLINE)
  (7) The workstation is manually varied back to A (ACTIVE)
      status and then within a few seconds a CP EXTEND is
      submitted (the CP EXTEND must start while the zcentric
      workstation is still in "A" status
  (8) The processing loop occurs.  If the zcentric agent is
      started again (./StartUpLwa) the loop will be terminated
  

Local fix

• Do NOT vary a zcentric workstation to status ACTIVE (A)
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All TWS for z/OS 851, 860, 910,920           *
  *                 zCentric users                               *
  *                 FUNCTION=zCentric                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Manual variation of the zCentric WS     *
  *                      status, can result in a submission      *
  *                      retry loop.                             *
  ****************************************************************
  * RECOMMENDATION: To fix:                                      *
  *                 - APPLY THE PTF FIXING THIS APAR             *
  *                 To Circumvent:                               *
  *                 - Avoid the manual status change of the      *
  *                   zCentric WS, if the Agent is down.         *
  *                 - Activate the zCentric Agent to interrupt   *
  *                   the retry loop.                            *
  ****************************************************************
  A processing loop with thousands of event "2R" created may
  be seen if a zCentric workstation is manually varied to ACTIVE
  status and then a CP EXTEND is run before the workstation gets
  set automatically back to OFFLINE status (since the Agent is
  actually down)
  The operations to be started on that Agent are indefinitely set
  to ready status after the failure in attempting to submit them.
  

Problem conclusion

• zCentric code has been changed in order to properly manage the
  WS status. Moreover in this situation it might also occur that
  an operation supposed to end with JCLI is set to ready and
  retried.
  512Y
  602Y
  912Y
  922Y
  EQQEMQJS
  EQQZHTCL
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• ×**** PE16/04/18 PTF IN ERROR. SEE APAR PI60470  FOR DESCRIPTION
  

APAR Information

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

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

  UI33897 UI33898 UI33899 UI33900

Modules/Macros

• EQQEMQJS EQQZHTCL
  

Fix information

• Fixed component name

  TIV WRKLD SCHD

• Fixed component ID

  5697WSZ01

Applicable component levels

• R512 PSY UI33897

     UP16/03/17 P F603 ¢

• R602 PSY UI33898

     UP16/03/17 P F603 ¢

• R912 PSY UI33899

     UP16/03/17 P F603 ¢

• R922 PSY UI33900

     UP16/03/17 P F603 ¢

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.