IBM Support

MF50151 - TCPIP-TELNET-WAIT TELNET MAY DEADLOCK AND STOP NEW COMMUNICA

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

TCPIP-TELNET-WAIT TELNET MAY DEADLOCK AND STOP NEW COMMUNICA


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
PRE  5770999  710  MF48794   00/00    0000
DIST 5770SS1  710  SI36974   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
In some circumstances, Telnet VTM may deadlock with streams.
This can cause all new TCP communcications to fail. IPL is
required to correct the condition.

CORRECTION FOR APAR MA39496 :
-----------------------------
The Telnet session was being ended while it was still
negotiating. There was a timing window where the socket was
closed to the client at the same time Telnet was preparing to
select a device. This timing window left a lock on the device
manager in the process that eventually would deadlock the
process. The process was the Ethernet IO process, which would
result in no communications working.

CIRCUMVENTION FOR APAR MA39496 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


Before applying or removing this PTF, you need to end Telnet. Use the
"ENDTCPSVR *TELNET" CL command.

Then apply or remove the PTF.

Once that is complete, start Telnet using the "STRTCPSVR *TELNET" CL
command.

********************************************************************
THE FOLLOWING ARE SUPERSEDED SPECIAL INSTRUCTIONS. IF THE SUPERSEDED
PTF HAS ALREADY BEEN APPLIED AND ITS SPECIAL INSTRUCTION FOLLOWED,
IT IS NOT NECESSARY TO FOLLOW THAT SPECIAL INSTRUCTION AGAIN.
********************************************************************

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF49142 :
=================================================

To apply or remove this ptf in immediate mode:

1. End the Telnet server with CL command  "ENDTCPSVR *TELNET"
2. Use ENDJOB to end all jobs with a job name of "QTVDEVICE" that
are
running in the QSYSWRK subsystem.
3. Apply or remove the PTF.
4. Re-start the Telnet server with the command "STRTCPSVR *TELNET"

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF MF48300 :
=================================================

Before applying or removing this PTF, you need to end Telnet. Use the
"ENDTCPSVR *TELNET" CL command. Then use WRKACTJOB to find all of the
jobs with a job name of QTVDEVICE in the QSYSWRK subsystem. Do an
ENDJOB with the *IMMED option on all of the QTVDEVICE jobs.

Then apply or remove the PTF. Once that is complete, start Telnet using
the "STRTCPSVR *TELNET" CL command.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF49142      TCPIP-TELNET-INCORROUT TELNET SERVER WILL CLOSE THE SESSION
   MF48814      LIC-COMM-OTHER-SRC07000050-UNPRED 0700 0050 VLOG MAY BE GENE
   MF48814      OSP-PERFM TIMING ISSUE WITH SSL TELNET CONNECTION
   MF48560      OSP-OTHER-UNPRED TELNET VIA JAVA PLUG IN FAILED
   MF48300      OSP-WAIT SSL ISERIES TO ISERIES TELNET CONNECTION HANG.
   MF48300      TCPIP-TELNET-PERFM QTVDEVICE JOBS ABEND RESULTING IN 0700 00

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA39496
Superseded by:......................View fix details for PTF MF65459
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0229710


System i Support

IBM disclaims all warranties, whether express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. By furnishing this document, IBM grants no licenses to any related patents or copyrights. Copyright © 1996,1997,1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 IBM Corporation. Any trademarks and product or brand names referenced in this document are the property of their respective owners. Consult the Terms of use link for trademark information.

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG15V","label":"PTF Cover Letters - OS\/400 General"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG16D","label":"PTF Cover Letters - IBM i 7.1 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF012","label":"IBM i"}],"Version":"V7R1M0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
21 May 2010