No, once a cluster is up, it will be able to recover after being down for a while.
Cheers, /peter neubauer Google:neubauer.peter Skype:peter.neubauer Phone: +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter @peterneubauer brew install neo4j && neo4j start heroku addons:add neo4j On Fri, Dec 23, 2011 at 1:09 PM, Anirudha Ravindra Ghante <[email protected]> wrote: > Hi Peter, > > We are not trying to run multiple neo4j clusters on same machine. > Configuration is : > 3 machines : each running a ZK and neo4j server. > > So, does this mean that if one of the nodes goes down, we have to delete > the graph.db before restarting the neo4j server again (even with the above > configuration)? > > > On Fri, Dec 23, 2011 at 6:38 AM, Peter Neubauer < > [email protected]> wrote: > >> Anirudha, >> I think this might be a bug that is fixed in Master. Now, the Neo4j >> Coordinator ZK cluster can manage several HA clusters and should not >> give that exception. However, do you want to run multiple clusters >> there? Otherwise, removing the DB and starting fresh so it gets copied >> over from the master is the way to go. >> >> Cheers, >> >> /peter neubauer >> >> Google:neubauer.peter >> Skype:peter.neubauer >> Phone: +46 704 106975 >> LinkedIn http://www.linkedin.com/in/neubauer >> Twitter @peterneubauer >> >> brew install neo4j && neo4j start >> heroku addons:add neo4j >> >> >> >> On Fri, Dec 2, 2011 at 3:08 PM, anirudha <[email protected]> wrote: >> > Hi, >> > >> > We are trying to setup neo4j in high-availability mode with 3 nodes in >> the >> > cluster. >> > When we restart any of the neo4j servers, it fails. We get following >> > exception: >> > >> > ==> neo4j-zookeeper.log <== >> > ERROR main-EventThread org.apache.zookeeper.ClientCnxn - Error while >> calling >> > watcher >> > java.lang.RuntimeException: There's already an HA cluster managed by this >> > ZooKeeper cluster >> > at >> org.neo4j.kernel.ha.zookeeper.ZooClient.getRoot(ZooClient.java:370) >> > at >> > >> org.neo4j.kernel.ha.zookeeper.AbstractZooKeeperManager.getAllMachines(AbstractZooKeeperManager.java:194) >> > at >> > >> org.neo4j.kernel.ha.zookeeper.AbstractZooKeeperManager.getMasterFromZooKeeper(AbstractZooKeeperManager.java:134) >> > at >> org.neo4j.kernel.ha.zookeeper.ZooClient.process(ZooClient.java:122) >> > at >> > >> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:530) >> > at >> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506) >> > >> > >> > If we delete the database folder "graph.db" and then start the server, it >> > starts with no exception and syncs the data. >> > Am I missing any configuration? >> > >> > Thanks. >> > >> > -- >> > View this message in context: >> http://neo4j-community-discussions.438527.n3.nabble.com/There-s-already-an-HA-cluster-managed-by-this-ZooKeeper-cluster-tp3554731p3554731.html >> > Sent from the Neo4j Community Discussions mailing list archive at >> Nabble.com. >> > _______________________________________________ >> > Neo4j mailing list >> > [email protected] >> > https://lists.neo4j.org/mailman/listinfo/user >> _______________________________________________ >> NOTICE: THIS MAILING LIST IS BEING SWITCHED TO GOOGLE GROUPS, please >> register and consider posting at >> https://groups.google.com/forum/#!forum/neo4j >> >> Neo4j mailing list >> [email protected] >> https://lists.neo4j.org/mailman/listinfo/user >> > _______________________________________________ > NOTICE: THIS MAILING LIST IS BEING SWITCHED TO GOOGLE GROUPS, please register > and consider posting at https://groups.google.com/forum/#!forum/neo4j > > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ NOTICE: THIS MAILING LIST IS BEING SWITCHED TO GOOGLE GROUPS, please register and consider posting at https://groups.google.com/forum/#!forum/neo4j Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
