PM43131: TN3270E SESSION ATTEMPT REJECTED BY TELNET SERVER WITH: RCODE: 3004-00 LU IS NOT AVAILABLE.

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible.

Error description

• A Telnet server was started using profile statements
  similar to the following:
  
  TELNETPARMS
    PORT 23
    LUSESSIONPEND
    MSG07
  ENDTELNETPARMS
  BEGINVTAM
    PORT 23
    LUGROUP MYLUS
      LUNAME01..LUNAME30..FFFFFFNN
    ENDLUGROUP
    LUMAP MYLUS nn.nn.nn.nn
    ALLOWAPPL TSO* DISCONNECTABLE
  ENDVTAM
  
  A client connected to the Telnet server and received the
  solicitor panel.  Next, an application was specified which did
  not meet the above ALLOWAPPL statement criteria.  The logon
  attempt failed with RCode = X'3012' RC_APPL_INVLD
  and the following solicitor message was returned:
  
  Enter Your Userid:
  Password:                              New password:
  Application: XXX
  Invalid application selected
  
  A valid application name was then entered.  This session
  attempt failed with: RCode = X'3004' RC_LU_NO_MATCH.
  
  Enter Your Userid:
  Password:                              New password:
  Application: TSO
  No LUs available now, please try later
  
  The client was unable to start a session.  Disconnecting and
  then reconnecting the client resolved the problem.
  

Local fix

• Disconnect/reconnect to the Telnet server.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release(s)  10, 11, and   *
  *                 12 IP: Telnet facilities                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Telnet client logon to target host      *
  *                      application fails with:                 *
  *                      RCODE: 3004-00  LU is not available.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The Telnet server was started with statements similar to the
  following in the BEGINVTAM section of the profile:
  
  LUGROUP  GRPALL  TCPM1151..TCPM1170 ENDLUGROUP
  IPGROUP IP#ALL
    0.0.0.0:0.0.0.0
  ENDIPGROUP
  LUMAP  GRPALL   IPGRP,IP#ALL
  ALLOWAPPL TSO*
  
  A TN3270E client connected to the Telnet server and then
  attempted to logon to host application APPL1 which is not
  allowed.  This logon attempt was rejected by the Telnet
  server.  USSMSG04 was returned to the client:
  
  APPLID PARAMETER VALUE APPL1 NOT VALID
  
  In addition, the following Telnet debug message was issued:
  
  EZZ6035I TCPCS1 DEBUG CONN   DETAIL 198
    IP..PORT: x.xx.xxx.xxx..yyyy
    CONN: 0000002B  LU: TCPM1151 MOD: EZBTPGLU
    RCODE: 3012-00  Application name is invalid.
    PARM1: 00000000 PARM2: 00000000 PARM3: 00000000
  
  The client next attempted to logon to TSO.  This logon
  attempt should have worked but was instead rejected
  with USSMSG07:
  
  UNABLE TO ESTABLISH SESSION - LU LOOKUP FAILED WITH
  SENSE 00003004
  
  The following Telnet debug message was also issued:
  
  EZZ6035I TCPCS1 DEBUG CONN   DETAIL
    IP..PORT: x.xx.xxx.xxx..yyyy
    CONN: 000006EE  LU: TCPM1151 MOD: EZBTPGLU
    RCODE: 3004-00  LU is not available.
    PARM1: 00000000 PARM2: 00000000 PARM3: 00000000
  
  LU TCPM1151 was already assigned to the client.  RCode
  3004 should not have been issued and the session logon
  should have succeeded.
  +-------------------------------------------------------------+
  + Please check our Communications Server for OS/390 homepages +
  + for common networking tips and fixes.  The URL for these    +
  + homepages can be found in Informational APAR II11334.       +
  +-------------------------------------------------------------+
  

Problem conclusion

Temporary fix

Comments

• Module EZBTPGLU has been amended to clear the CVB based
  LU search flags following a session logon attempt failure
  with: RCODE: 3012-00  Application name is invalid.
  

APAR Information

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

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

  UK70166 UK70167 UK70168

Modules/Macros

• EZBTPGLU
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R1A0 PSY UK70166

     UP11/09/15 P F109

• R1B0 PSY UK70167

     UP11/09/15 P F109

• R1C0 PSY UK70168

     UP11/09/15 P F109

Fix is available

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