How to enable Wildfly 10 InMemorySessionManager? - wildfly

Question

I'm using Widlfy 10, but do not want to use the DistributableSessions that are used by Wildfly out of the box (I am having some session handling issues and need to debug things at a basic level). I see that Undertow has an InMemorySessionManager which I would rather use instead. But I haven't been able to figure out how to specify a different SessionManager.
I've tried to configure my Wildfly cache as a local cache:
<subsystem xmlns="urn:jboss:domain:infinispan:4.0">
<cache-container name="server" aliases="singleton cluster" default-cache="default" module="org.wildfly.clustering.server">
<transport lock-timeout="60000"/>
<replicated-cache name="default" mode="SYNC">
<transaction mode="BATCH"/>
</replicated-cache>
</cache-container>
<cache-container name="web" default-cache="passivation" module="org.wildfly.clustering.web.infinispan">
<local-cache name="passivation">
<locking isolation="REPEATABLE_READ"/>
<transaction mode="BATCH"/>
<file-store passivation="true" purge="false"/>
</local-cache>
<local-cache name="persistent">
<locking isolation="REPEATABLE_READ"/>
<transaction mode="BATCH"/>
<file-store passivation="false" purge="false"/>
</local-cache>
</cache-container>
...
...
However, in debugging my application, I still see that Wildfly is using the DistributableSessionManager and DistributableSessions instead.
Is there anyway to enable the Undertwo's InMemorySessionManager instead? Do I have to go through the effort of creating my own ServletExtension and Factory and configuring it in the META-INF/services/io.undertow.servlet.ServletExtension or is there an out-of-the-box way of enable functionality that already exists via the config file? Or do the required classes already exist as part of the Undertow/Wildfly packaging?

Answer 1

There are only conditions that result in the use of the distributed session manager:
in web.xml
Using shared sessions across web application within an ear, via shared-session-config.xml
Given that you've already stated that #1 is not the case, I'll assume #2. To disable the use of the distributed session manager for shared sessions, remove the org.wildfly.clustering.web.undertow module from your distribution.