Nuxeo Cluster - Load Balancer - Session replication failed - apache

Question

I have configured apache2.4 http load balancer as :
ProxyPass /nuxeo balancer://sticky-balancer stickysession=JSESSIONID|jsessionid nofailover=On
<Proxy balancer://sticky-balancer >
BalancerMember xxxxxxx.40:8080/nuxeo route=nxworker1
BalancerMember xxxxxxx.41:8080/nuxeo route=nxworker2
</Proxy >
ProxyPreserveHost On
On nuxeo instances I have done config as suggested on nuxeo docs at 40:
nuxeo.server.jvmRoute=nxworker1 and nuxeo.server.jvmRoute=nxworker2 at 41
When one of instances goes down for ex 40, during a user is connected and working on it, it needed to do login again because session
seems is not replicated for node 41
Have any body any suggestion?
Thanks

Answer 1

That is expected: the session is sticky, not replicated. As stated in the documentation, you will have to authenticate again or not, depending on your configuration and architecture:
The Nuxeo Platform requires all calls to be authenticated. Depending on your architecture, authentication can be stateless (ex: Basic Auth) or stateful (ex: Form + Cookie). Either way, you probably don't want to replay authentication during all calls.
That's why having a session based authentication + session affinity can make sense: you don't have to re-authenticate each time you call the server.
If the session affinity can not be restored, for example because the target server has been shutdown:
stateless authentication will be automatically replayed (ex: Basic Auth)
for stateful authentication:
if you have a SSO this will be transparent
if you don't have a SSO, user will have to authenticate again.