PH19392: WHEN CHECKPOINTING IS TURNED ON IT INCREASES THE NODE SYNCHRONIZATION TIMES

APAR status

• Closed as program error.

Error description

• When Checkpointing is turned ON it increases the Node
  synchronization times.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server version 8.5.5 or later               *
  ****************************************************************
  * PROBLEM DESCRIPTION: When Checkpointing is turned ON in a    *
  *                      Network Deployment environment,         *
  *                      it increases the node synchronization   *
  *                      time.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In the current scenario, when the checkpointing is ON in a
  Network Deployment(ND) environment, in addition to checkpoints
  being generated on the Deployment Manager they are
  also generated on the Nodes during node synchronization.
  And, when dealing with larger applications and
  greater checkpoint depths there is a significant delay in
  the node synchronization.
  

Problem conclusion

• This fix provides an option through a custom property to
  avoid
  checkpoint generation on the Nodes when Checkpointing is
  turned ON the Deployment Manager.
  So, when the Checkpointing is ON and the custom property
  com.ibm.ws.checkpoint.bypass is set to TRUE on the
  Deplyoment Manager and all the Nodeagents then checkpoints
  will be generated on the Deployment Manager only and not on
  the Nodes during node sync.
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.18 and 9.0.5.4.
  
  For more information, see
  'Recommended Updates for WebSphere Application Server':
  http://www.ibm.com/support/docview.wss?
  rs=180&uid=swg27004980
  

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

     UP

• R900 PSY

     UP