LO81574: OS CLOCK MOVING TO BE NON-CONCURRENT AND TSSDATE IN THE FUTURE MAY CAUSE HA SERVERS TO BE MARKED AS NOT ALIVE

APAR status

• Closed as program error.

Error description

• If the OS clock on a Traveler HA server is moving such that it
  becomes more than a few seconds out of time sync with the other
  servers in a pool (and the enterprise DB servers) AND some data
  in the internal logon path with TSSDate is sufficiently far in
  the future, the Heartbeat logic will mark servers as not being
  alive because  the Heartbeat time will not be within the
  specified time period  (normally 1 minute).
  

Local fix

• The OS clock should not be moving very much, so the system
  itself should be changed to use a time service (such as NTP) to
  keep the clocks in sync across the servers.
  
  If the OS clock is moved and you start getting load balancing
  errors or all your servers are marked as not alive because of
  the heartbeat value when they really are alive and have
  heartbeated within the past minutes, you can workaround the
  issue by restarting the Traveler and HTTP tasks (or the whole
  Domino server).  Before you restarting, you should fix the OS
  clock, but that is not known to be required (just recommended).
  

Problem summary

• This is not at all common, but if the System clock wanders on a
  Traveler server it could result in the server being marked as
  not available to the other Traveler servers in the HA Pool.
  

Problem conclusion

• The Notes Traveler server has been updated to be more tollerant
  of a changing system clock, though in general it is best to use
  a time service to ensure accurate time is kept on the servers.
  

Temporary fix

• This fix is included in Notes Traveler 8.5.3 UP2 IF7, 9.0.0.1
  If7 and 9.0.1 IF6 and will be included in any future releases.
  
  See this technote for the latest maintenance infomation:
  http://www.ibm.com/support/docview.wss?uid=swg24019529
  

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

  LOTUS NOTES TRA

• Fixed component ID

  5724E6204

Applicable component levels

• R853 PSY

     UP

• R900 PSY

     UP

• R901 PSY

     UP