[keycloak-user] Keycloak node cannot join cluster, initial state transfer timed out

[Matt Evans]

Strangely, it seems to have fixed itself over the weekend. I came to look at it this morning and the new node successfully retrieved the initial state data. I've not made any changes to configuration etc.

I'd still like to know why it was happening and how to prevent it though.

Matt


-----Original Message-----
From: keycloak-user-bounces at lists.jboss.org [mailto:keycloak-user-bounces at lists.jboss.org] On Behalf Of Matt Evans
Sent: Saturday, 2 September 2017 7:47 AM
To: Meissa M'baye Sakho <msakho at redhat.com>
Cc: keycloak-user at lists.jboss.org
Subject: Re: [keycloak-user] Keycloak node cannot join cluster, initial state transfer timed out

No, I just start up keycloak and run standalone ha. There's no mention of that property in the keycloak docs about clustering

Matt

________________________________
From: Meissa M'baye Sakho <msakho at redhat.com>
Sent: Saturday, September 2, 2017 12:53:35 AM
To: Matt Evans
Cc: keycloak-user at lists.jboss.org
Subject: Re: [keycloak-user] Keycloak node cannot join cluster, initial state transfer timed out

Matt,
How did you add your new node?
Have you defined the jboss.node.name<http://jboss.node.name> property in your new node?
Meissa

On Fri, Sep 1, 2017 at 6:31 AM, Matt Evans <mevans at aconex.com<mailto:mevans at aconex.com>> wrote:
We're running keycloak clustered with standalone-ha.xml, and it's been working fine.

We changed the 'owners' of the distributed caches for session, loginFailures etc to 2 so that it will distribute those caches across the 2 nodes in the cluster.

Now, when I remove a node and add a new node, the new node fails to start some of the services, due to:

org.infinispan.commons.CacheException: Initial state transfer timed out for cache sessions on xxxx

Is this because it's actually taking too long to fetch the initial cache data from the other node? Is it due to the size of the cache, or some other issue?

What can I do to address this so that I can add the node back into the cluster?

I'm not experienced at all in infinispan or jgroups, so any pointers on how to query the servers to see whats in the caches, and how to see what's actually happening will be appreciated!

Thanks

Matt
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