That's my blog!

Sorry to not respond to those comments on the blog, I had no idea people commented ... no email notification ...

I haven't tried the docker image for a while, but you may have figured it out. 

That looks like an appropriate fix to me.

On Tue, Dec 1, 2015 at 4:02 PM, Paul Blair <pblair@clearme.com> wrote:

I've been using Docker with the HA configuration as described here: http://blog.keycloak.org/2015/04/running-keycloak-cluster-with-docker.html

I ran into the same problem as David Willson describes in the comments, namely a NullPointerException at org.keycloak.models.sessions.infinispan.initializer.OfflineUserSessionLoader.init(OfflineUserSessionLoader.java:25). Looking at the code, it seems as though a UserSessionPersister was coming back null.

I added to keycloak-server.json the following:

    "userSessionPersister": {

        "provider" : "jpa"

    },

and now everything starts ok. Is this the appropriate fix for a clustered configuration?

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