PH35681: LOAD BALANCER FOR IPV4 AND IPV6 DOES NOT SEND RESETS TO CLIENTS WHEN SERVER DETECTED OFFLINE AND PORT RESET ENABLED.

APAR status

• Closed as program error.

Error description

• If port reset is configured and the server is marked offline
  by an advisor, a RST packet should be sent to each client with
  an active connection to that server. No RST (reset) is sent to
  the clients.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Edge Load  *
  *                  Balancer for IPv4 and IPv6 users            *
  ****************************************************************
  * PROBLEM DESCRIPTION: The port level reset function does      *
  *                      not immediately send RST to clients     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The Load Balancer has a port level reset function that
  notifies clients to reset the connection when the backend
  server the connection is using is detected down. The reset
  packt is not sent to the client immediately when the server is
  detected down.
  

Problem conclusion

• The reset packet was not sent to connected clients until the
  client sent a packet to the load balancer. Corrected the code
  to send a RST packet to connected clients immediately when the
  server is detected offline and port reset is set to yes.
  
  Fix levels:
     8.5.5.20
     9.0.5.9
  

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

  WS EDGE LB IPV4

• Fixed component ID

  5724H8812

Applicable component levels