OA42880: LOOP IN ISTSDCLO AFTER ISSUING AN ACTIVATE ON AN APPLICATION MAJOR NODE

APAR status

• Closed as fixed if next.

Error description

• A new Mode Table was created with a missing JCL card causing the
  job to create a module with the size of 0000 bytes.
  //        DD   DDNAME=SYSIN was missing in the JCL.
  
  When the new major node was activated with the new mode table
  the following messages were issued and VTAM went into a loop.
  
  V NET,ID=APPLDEF,ACT
  IST097I VARY ACCEPTED
  IST320I DEFINITION APPLDEF NOT SUCCESSFUL - INSUFFICIENT
  STORAGE
  IST330I TABLE TYPE = MODETAB NAME = NEWTAB
  IST072I VARY ACT FOR ID = APPLDEF FAILED DURING NETWORK
  DEFINITION
  
  At this point, no commands could be issued and VTAM had to be
  restarted.
  

Local fix

• Fix the table and restart VTAM.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of VTAM model APPL statements                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * ISTSDCLO loop after APPL major node activation failure       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Fix APPL major node definition                               *
  ****************************************************************
  The problem may be summarized as follows:
  1. An APPL major node was defined with a table that had an
  error.
  2. V NET,ACT of the APPL major node failed because of the table
  error:
  IST097I VARY ACCEPTED
  
  IST320I DEFINITION APPLxxxx NOT SUCCESSFUL - INSUFFICIENT
  STORAGE
  IST330I TABLE TYPE = MODETAB NAME = xxxxxxxx
  
  IST072I VARY ACT FOR ID = APPLxxxx FAILED DURING NETWORK
  DEFINITION
  3. A subsequent OPEN ACB that searched the model APPLs caused a
  loop in ISTSDCLO, causing VTAM to hang.
  

Problem conclusion

Temporary fix

Comments

• The solution for this APAR is included in CS for zOS Version 2
  Release 2.
  
  
  
  
  ISTSDCIO will be modified to dechain the model APPL RDTE before
  it is freed.
  
  This APAR is fixed in HIP61C0 and HIP61D0 by APAR OA44082.
  

APAR Information

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

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

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R210 PSN

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