IZ78057: SSM spinning at 100% CPU inside snmp.dll:select() with STATUS_IN VALID_HANDLE

IBM Tivoli 4.0.0-TIV-SSM-FP0010
IBM Tivoli 4.0.0-TIV-SSM-FP0011
IBM Netcool System Service Monitor SSM 4.0 Fix Pack 12 README 4.0.0-TIV-SSM-FP0012
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

• SSM spinning at 100% CPU inside snmp.dll:select() with
  STATUS_INVALID_HANDLE:
  
  0000008 594313cb 00000000 ntdll!RtlNtStatusToDosErrorNoTeb+0x6f
  c0000008 068ffd5c 068ffdac ntdll!RtlNtStatusToDosError+0x3b
  c0000008 92fd767d 015ae980 mswsock!NtStatusToSocketError+0x10
  00000301 068ffe54 00000000 mswsock!WSPSelect+0x3b6
  00000301 068ffe54 00000000 ws2_32!select+0x494
  7640f551 06416e88 001d9d0b
  snmp!snmp::MsgReceiver::ProcessSocks+0xfd
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of SSM 4.0 on Windows.
  ****************************************************************
  PROBLEM DESCRIPTION:
  SSM spinning at 100% CPU inside snmp.dll:select() with
  STATUS_INVALID_HANDLE
  ****************************************************************
  RECOMMENDATION:
  Upgrade to Fix Pack 10 for SSM 4.0.
  ****************************************************************
  

Problem conclusion

• Prevented the SNMP library from spinning the CPU if socket
  errors occur. However the issue could never be reproduced.
  
  The fix for this APAR is contained in the following maintenance
  packages:
  | fix pack | 4.0.0-TIV-SSM-FP0010
  

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 PSN

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