IV33578: THE ITNM_DISCO.PL CORE DUMP WHEN IT IS STOPPED BY CTRL+C

IBM Tivoli Network Manager IP 3.9.0 Fix Pack 4, 3.9.0-TIV-ITNMIP-FP0004
IBM Tivoli Network Manager IP Edition 3.9.0 Fix Pack 5, 3.9.0-TIV-ITNMIP-FP0005

APAR status

• Closed as program error.

Error description

• Environment :
  ITNM v3.9-FP01 on AIX 7.1
  
  Problem Description:
   The itnm_disco.pl core dump when interrupted by Ctrl+C .
  
  Steps to replicate:
  
  1. Start Discovery
  
     # ./ncp_perl ./itnm_disco.pl -domain <domain> -start
  2. Check the status
     # ./ncp_perl ./itnm_disco.pl -domain <domain> -status
  
  Now when we press Ctrl c it exit with Segmentation fault (core
  dumped)
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All ITNM 3.9 users                                           *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * The issue is that if you run the itnm_disco.pl script and    *
  * then interrupt it before it completes on AIX then it will    *
  * core. The issue is caused by the way that AIX and perl       *
  * handle signals. On Linux and solaris the signals end up      *
  * being called within the main thread but on AIX they can get  *
  * called on the IO thread. In addition the use of multiple     *
  * signal handlers can result in inconsistent data ( i.e. cores *
  * ) according to the perl manual. The ncp_perl script has a    *
  * signal handler and as the perl script also had a signal      *
  * handler it caused a core.                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * upgrade to | fix pack | 3.9.0-ITNMIP-FP0004                  *
  ****************************************************************
  

Problem conclusion

• The problem was resolved by improving the signal management
  within the ncp_perl process and removing the signal handler code
  within the perl script itself.
  

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

  TIV NETWK MGR I

• Fixed component ID

  5724S4500

Applicable component levels

• R390 PSN

     UP

• R390 PSY

     UP

• R401 PSN

     UP

• R401 PSY

     UP