IV15741: SSM4 : ARITHMETIC SUB AGENT CAN CAUSE A CRASH WHEN TRIGGERED BY A HIGH LOAD

IBM Netcool System Service Monitor SSM 4.0 Fix Pack 13 README 4.0.0-TIV-SSM-FP0013
IBM Netcool System Service Monitor SSM 4.0 Fix Pack 14 README 4.0.0-TIV-SSM-FP0014
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 1 README 4.0.0.14-TIV-SSM-IF0001
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 2 README 4.0.0.14-TIV-SSM-IF0002
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 3 README 4.0.0.14-TIV-SSM-IF0003
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 4 README 4.0.0.14-TIV-SSM-IF0004
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 5 README 4.0.0.14-TIV-SSM-IF0005
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 6 README 4.0.0.14-TIV-SSM-IF0006
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 7 README 4.0.0.14-TIV-SSM-IF0007
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 8 README 4.0.0.14-TIV-SSM-IF0008
IBM Netcool System Service Monitor SSM 4.0 Interim Fix 1 README 4.0.0.15-TIV-SSM-IF0001

APAR status

• Closed as program error.

Error description

• If an arithmetic row is configured to process based on an event
  triggering, it is possible to have more than one event
  triggering the row simultaneously. Under a high load of events,
  thousands being triggered at once, it's possible for the agent
  to crash  as the row evaluation does not handle being executed
  simultaneously.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of Arithmetic rows that are triggered by an event.     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When arithmetic rows are triggered by events ( using a       *
  * negative interval ) the SSM can crash if the row is being    *
  * triggered a lot during a short period of time. This is       *
  * because the arithmetic evaluation can occur simultaneously   *
  * and one invocation can destroy data the other invocation is  *
  * referencing.                                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to SSM Fix Pack 13.                                  *
  ****************************************************************
  

Problem conclusion

• Altered code so row evaluation is synchronised.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  | fix pack | 4.0.0-TIV-SSM-FP0013
  

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

  NETCOOL SYS SVC

• Fixed component ID

  5724P4300

Applicable component levels

• R400 PSY

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