Refer to the Exhibit.
Scenario : A multi-cluster architecture, with two geographically separated clusters (WAN-1 and
WAN-2), is being created. It will provide cross-cluster WAN HTTP session failover. The WAN-1
cluster is located in London and the WAN-2 cluster is located in New York and is connected via a
slow interconnect. The client request passes through a Global load balancer which load balances
the request to local load balancers which eventually pass the load to WebLogic Server instances
in the cluster. Four WebLogic Server instances will be running on each cluster distributed on two
physical machines, two WebLogic instances per physical machine. A database is configured on
each cluster for HTTP Session state failover between the clusters. What happens if all the servers
hosted in the London cluster crashes in the middle of an http session update?
A.
The session will be regenerated on theNew York cluster without any session data loss, and a
new primary server will be created using the secondary session data.
B.
The session will be regenerated on theNew York cluster but there could be a loss of session
data; a new primary server will be created using the last known secondary session data.
C.
The session will not be regenerated on any cluster; the user will be redirected to theNew York
cluster to create a new session.
D.
The session will be regenerated if the primary server on theLondon cluster is restarted.
E.
Both b and d