Afaik the quorum has to be in majority for cluster to be active. With 2 servers, a new leader cannot be selected by minority of less than 50% servers. Since you have just 2, so quorum is not reached for leader selection. That's why it is adviced to run odd number of nodes and minimum is 3. Hope that helps
-----Original Message----- From: "Tamás Barta" <bartata...@gmail.com> Sent: 07-04-2016 04:17 PM To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org> Subject: Re: Cluster Maybe I should ask a question instead how to set up a two-node solr cluster where both nodes contains the same data (collections are replicated to the other) and if I shut down one of the nodes the other node will work and i can send updates and queries to it. Is it possible? On Thu, Apr 7, 2016 at 11:32 AM, Tamás Barta <bartata...@gmail.com> wrote: > Hi, > > I'm new to Solr so maybe I don't understand Solr cluster right. I would > like to create a two-node cluster and the system should work if one of the > nodes is down. > > I created a collection in a node and set the other as replication. Now > when I open Cloud Graph I can see that one of the nodes is Leader and the > other is Active. > > When I shut down the Active node everything is OK. > > When I shut down the Leader node then the Active node become Recovering > and I can't search on it. It says "Could not find a healthy node to handle > the request.". In Solr logs I see the following errors: > > o.a.s.c.RecoveryStrategy Error while trying to recover. > core=products_shard1_replica1:org.apache.solr.common.SolrException: No > registered leader was found after waiting for 4000ms > > What should I do to set up a two-node cluster right? > > Thanks, > Tamas >
