Tuesday, June 20, 2017

Red Alert : CICS TS for z/OS V5.3 - Unpredictable results when identical Unit Of Work ID (UOWID) passed to multiple CICS subsystems

Yesterday, IBM issued a Red Alert on CICS V5.3. Here's the info. I'm just taking over the text from the Red Alert.

Users Affected:

Users of CICS Transaction Server for z/OS V5.3 who are using any kind of subsystem that CICS connects to such as:
  • DB2
  • IBM
  • WebSphere MQ
  • Coupling Facility Data Tables (CFDT)
  • Shared Temporary Storage Server
  • Named Counter Server
  • Vendors like Oracle


Two or more CICS tasks obtain the same Unit Of Work ID (UOWID) and pass the ID to the respective subsystem. The subsystem may then experience unpredictable results because it thinks that it is being called out of sequence for just one unit of work. APAR PI82188 describes symptoms that have been observed, such as CICS DB2 applications abend or CICS CFDT records become locked due to two CICS tasks passing non-unique Unit Of Work IDs. However, this can affect any CICS subsystem, not just DB2 and CFDT. Please see APAR PI82188 for additional information.

Recommended Actions:

Apply PTF UI47871 for CICS TS for z/OS V5.3 APAR PI82188 as soon as possible to prevent unpredictable results.

If you haven't signed up to the Red Alerts by now, you really should do it. Just go over here.

Monday, March 20, 2017

IBM z Systems Study Tour Benelux 2017

IBM Belgium is organizing another z Systems Study Tour to New York from May 15 until May 19, 2017. Should you have any questions, you can contact me or else Hans Deketele, who will no doubt make this once again a flawless organization (hans_deketele@be.ibm.com). Here's an extract from the invitation.

"Dear IBM customer,
Following a long-standing tradition, we have again organized a Benelux z Systems Study Tour and hereby, I have the pleasure to send you your invitation to join us during this year's z Systems Study Tour to New York City, USA taking place from May 15 to 19, 2017.
During this Tour you will be updated on the latest information in the world of IBM z Systems and LinuxONE, along with modern IT architectural views and insights from our best speakers and experts. The program will cover main themes such as:
  • Trends in Enterprise Architecture: how all IT platforms fit together in today's fast changing environments
  • z Systems roadmap: what the future brings ...
  • LinuxONE: Linux your way, Linux without risk and Linux without limits!
  • Cognitive Computing, Artificial Intelligence and Watson: capabilities and architectural considerations
  • Analytics, Blockchain, Cloud, Security & Digital Transformation
  • New EU regulations on Instant Payments and Data Privacy: the impact on IT
  • Quantum Computing explained: a sneak preview by IBM Research...
  • ... and of course the intense networking with colleagues, peers and IBM experts"
Here's the first draft of the agenda

Click on picture for larger version