A fix is available
APAR status
Closed as program error.
Error description
A TN3270 server is started, but sits idle (no client connections that ever establish an SNA session) after that. If any maintenance (PTFs) is applied that affects the EZBTTMST load module in the active SEZALOAD library (and an LLA REFRESH is performed), the potential exists for unpredictable ABENDs to occur when a client finally does start a session that connects to an SNA application. Other symptoms: Analysis of the resultant dump will show the ABEND occurring immediately after a new task running EZBTTTSK is first dispatched. The entry point address in the CDE for EZBTTTSK does not reference the BRANCH RELATIVE instruction that immediately precedes the routine's eye-catcher.
Local fix
Ensure that at least one session is started that begins communicating with an SNA application (does an OPEN ACB) before any maintenance is applied to a live system. OR Recycle the TN3270 server after the maintenance is applied.
Problem summary
**************************************************************** * USERS AFFECTED: All users of the IBM Communications Server * * for z/OS Version 1 Releases 12 and 13 IP: * * Telnet facilities. * **************************************************************** * PROBLEM DESCRIPTION: Various abends are possible due to * * partial maintenance applied. * * * **************************************************************** * RECOMMENDATION: * **************************************************************** The problem is summarized as follows: 1. The TN3270 server is started. 2. Sometime later, maintenance that hits the EZBTTMST load module is applied. 3. Sometime later, the first Telnet connection occurs and the connection logs onto a VTAM application. 4. As a result, there may be two copies of the EZBTTMST load module in storage and some of the maintenance in one of the modules may be a mismatch of maintenance in other load modules loaded when Telnet was started. This can lead to ABENDs and other unpredictable results. +-------------------------------------------------------------+ + 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
EZBTNINI is updated to load alias EZBTTTSK so that when the first connection is made, there is no attempt to load a second copy of EZBTTMST. * Cross Reference between External and Internal Names
Temporary fix
Comments
APAR Information
APAR number
PM72871
Reported component name
TCP/IP V3 MVS
Reported component ID
5655HAL00
Reported release
1C0
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-09-13
Closed date
2012-09-19
Last modified date
2012-11-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK81913 UK81914
Modules/Macros
EZBTNINI
Fix information
Fixed component name
TCP/IP V3 MVS
Fixed component ID
5655HAL00
Applicable component levels
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
02 November 2012