OY64718: APPL HUNG IN PDELR STATE. LUCB SHOWS BIT LUCWAPPC IS ON - BUT THIS IS NOT AN APPC=YES APPL.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• APPL hung in PDELR state. CLOSE ACB hang.
  Dump shows that CLOSE is waiting for a DELETENR from APPC
  because LUCB bit LUCWAPPC is on. However, this is not an
  APPC=YES APPL. Storage alteration trap showed that this
  was set on by ISTSDCNE - who thought it was setting bit
  LUCTSCR in a MALT.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: APPL hung in PDELR state, CLOSE ACB     *
  *                      hang.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following description summarizes the problem:
   1) Non APPC APPL is abending.
   2) ISTTSCRF sends an FNA for a base APPL.
   3) ISTSDCNE is driven with an LUCB instead of a MALT.
      (because the control block being used is an LUCB, LUCWAPPC
       is set on instead of LUCTSCR)
   4) When LUCWAPPC is on, CLOSE will wait for a DELETENR from
      APPC processing.
   5) A DELETENR will not flow because the APPL is not APPC.
   6) CLOSE ACB hangs PDELR.
  
  #2 is the reason the problem is occurring. ISTTSCRF should not
  send an FNA for a base APPL. ISTTSCRF is sending the FNA because
  TSPNAPND is on.
  TSPNAPND indicates a Network ADD is pending for this FMCB which
  represents an Auxiliary Network address. TSPNAPND is currently
  set on in TSC when it creates an FMCB to represent a session and
  is turned off when the session is Network Added.
  TSC (ISTTSCQA) is setting TSPNAPND on for all FMCB's that
  represent a session, but TSPNAPND should ONLY be set on when the
  FMCB represents an AUXILIARY NETWORK address.
  

Problem conclusion

• ISTTSCQA has been changed as follows:
   IF the flow is inbound and the DAF is not equal to the APPL's
   base or secondary network address then set TSPNAPND on.
  
   IF the flow is outbound and the OAF is not equal to the APPL's
   base or secondary network address then set TSPNAPND on.
  

Temporary fix

Comments

APAR Information

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

  VM55783

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

  UY95431

Modules/Macros

• ISTTSCQA
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R101 PSY UY95431

     UP93/07/13 P F307

Fix is available

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