OW06024: SENSE 08900037 OR SENSE 08970007 ON SESSIONS TO DLUS-SERVED LUS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• -Sense code 08900037 on PLU-initiated sessions to an LU who is
  served by VTAM's Dependent LU Server (DLUS) function, or
  -Sense code 08970007 on a BIND to a DLUS-served LU, the PLU
   of the BIND is not a VTAM, and the DLUS host is an intermediate
   node on the BIND path
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All using the Dependent LU Server (DLUS)     *
  *                 function of VTAM V4R2                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: 1. Sense code 08900037 on               *
  *                         PLU-initiated sessions to LUs        *
  *                         served by VTAM's Dependent LU        *
  *                         server function.  The Dependent      *
  *                         LU requester (DLUR) node is a        *
  *                         network node in the same             *
  *                         subnetwork as the PLU node, and      *
  *                         the DLUS node is in a different      *
  *                         APPN subnetwork.                     *
  *                      2. Sense code 08970007 on BIND to       *
  *                         an LU served by DLUS.  The DLUS      *
  *                         node is also an intermediate node    *
  *                         on the BIND path, and the BIND was   *
  *                         sent by a node, like AS/400, which   *
  *                         does not do LU2 type sessions.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  1.  The PLU and the DLUR node are in the same subnetwork and the
      DLUS node is in a different subnetwork.  When a PLU-init
      request is done for the DLUR node, the search initially
      goes to the cross-subnet DLUS node.  When the reply is
      received from the DLUS node, the border node in the
      subnetwork of the PLU and DLUS node initiates a search to
      obtain DLUR TGVs in the border node FSM (ISTSLPXR).  Since
      the DLUR node is a network node, no TGVs are returned.
      Then the mainline PLU-init FSM (ISTSLPND) gets control and,
      since no SLU TGVs are present, attempts to get them again.
  
  2.  A node which does not reserve resources was trying to start
      a session to a DLS-served SLU by sending a BIND with an
      RSCV.  The DLS node was along the BIND path.  When the
      BFINIT was received, ISTSSCEB called ISTSSCUR, which had
      code to push an LU RDTE into shadow if this node is
      intermediate on the BIND path.  The theory behind this was
      that some other node must actually own the LU, and our
      node's definition is incorrect.
  
      However, in this case the LU was DLS served and this node
      was the DLS.  Therefore, even though this node was
      intermediate on the BIND path, the LU RDTE in this node for
      the SLU is correct and should not be pushed into shadow.
  
      Normally this would not be a problem because if the PLU were
      a node that reserves resources, there would have already
      been a SIB in this node, so ISTSSCUR would not have been
      called on the BFINIT.
  

Problem conclusion

• 1. ISTSLPND has been updated to not check the CVs list in the
  TGS_PROVIDED condition if the SLU is non-native.  (P114762)
  
  2.Code was added to ISTSSCUR to not push an LU RDTE into shadow
  when it is DLUS served and this node is intermediate on a BIND
  path. (P114833)
  

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:

  UW08642

Modules/Macros

• ISTSLPND ISTSSCUR
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R201 PSY UW08642

     UP94/08/04 P F408

Fix is available

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