IV75578: RESOURCE CONNECTIONS VISUALIZATION GRAPHS TOO MANY LINKS

IBM CICSIA-5.2.0-FP0004
IBM CICSIA-5.2.0-FP0005
IBM CICSIA-5.2.0-FP0006

APAR status

• Closed as program error.

Error description

• When user runs Resource Connections visualization, the search
  iterates through all links (including those that can be
  considered "weak", e.g. "RETURN TRANSACTION"), flooding the
  Resource Connections view with an excessive amount of graph
  nodes and causing CICS Explorer to become unresponsive.
  
  Additional Symptom(s) Search Keyword(s): KIXREVWJB
  

Local fix

Problem summary

• 1. The Resource connections visiuzalization will loop through
  all available connections to build the visualisation graph. When
  a very large number of nodes exists this can cause CICS Explorer
  to run out of memory. The Resource connections view was
  displaying too many connections, including those that could be
  considered "weak links", such as "Return Transaction". Where a
  complete graph is produced, the size can become very large, and
  might become diffucult for users to interpret.
  2. The data displayed in the Uses Resources view for a
  particular transaction might not match the results of a CICS
  Query against that transaction. This occurred when a transaction
  had different starting programs in different CICS regions. The
  Uses Resources view has been analyzing the Transactions'
  execution stack incorrectly. The plug-in assumed that a
  Transaction would always have the same initial program across
  all CICS regions.
  

Problem conclusion

• Resource connections view has been redesigned:
  - A memory management problem, which occurred during resource
  graph updates, was fixed;
  - The amount of resources displayed on a Resource graph has been
  restricted to those resources used in one transaction. When the
  user runs Resource Connections view, and there are some
  transactions found (connections via "START TRANSACTION" or
  "RETURN TRANSACTION"), the resource connections analysis stops
  there. To see the connections going from these transactions, you
  must open another graph for each of those transactions by
  selecting the "Show Connections" action in the context menu from
  the Transaction node. This allows the user to perform a
  step-by-step resource connections discovery.
  Uses Resources view has been redesigned:
  - Now the plug-in checks the initial program of each transaction
  in every region.
  This fix will be made available in version 5.2.0.4 of the CICS
  Interdependency Analyzer plug-in for CICS Explorer.
  For installation instructions please see:
  Ordering maintenance for the IBM Explorer for z/OS, IBM CICS
  Explorer and CICS Explorer plug-ins
  http://www.ibm.com/support/docview.wss?uid=swg21380083
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  CICS IA EXPL PL

• Fixed component ID

  5655Y2201

Applicable component levels

• R520 PSY

     UP