IV56652: AGENTS TIME OUT WHEN HEARTBEAT BACKLOG EXISTS

IBM Tivoli Monitoring 6.3.0 Fix Pack 4 (6.3.0-TIV-ITM-FP0004)

APAR status

• Closed as program error.

Error description

• APAR Type:            Field
  Approver Initials:    RB
  Severity:             3
  Reported Release:     630
  Compid:               5724C04MS Tivoli Enterprise Management
  Server
  ABSTRACT:             Agents time out when heartbeat backlog
  exists
  PROBLEM DESCRIPTION:
  Online agents can be incorrectly timed out if a backlog of
  heartbeats
  occurs.
  
  This problem can occur when a large number of agents are
  attempting to
  register at an RTEMS and the connection between the RTEMS and
  the HUB is
  slow. The backlog that develops can prevent heartbeats from
  currently connected agents from being processed in a timely
  manner.
  
  RECREATE INSTRUCTIONS:
  This is difficult to recreate and require a slow connection
  between the
  RTEMS and HUB.
  
  
  Improve the time it takes to send data between the RTEMS and
  the HUB or
  reduce the number of agents connected to the RTEMS.
  

Local fix

• Improve the time it takes to send data between the RTEMS and
  the HUB or
  reduce the number of agents connected to the RTEMS.
  

Problem summary

• Monitoring agents may time out when a heartbeat backlog exists.
  
  
  In systems with very large numbers of agents heartbeating, some
  agents can be set off-line because the second heartbeat from any
  given agent may not be processed until after the heartbeat grace
  period has expired.
  

Problem conclusion

• The code has been changed to always give priority to processing
  node heartbeats over node timeouts.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  
    | fix pack | 6.3.0-TIV-ITM-FP0004
  

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:

  OA46579

Fix information

• Fixed component name

  TEMS

• Fixed component ID

  5724C04MS

Applicable component levels

• R630 PSY

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