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Re: CDH4 : Add new node to existing cluster

by Contributor in Support Questions
‎11-02-2014 11:47 AM
1 Kudo
‎11-02-2014 11:47 AM
1 Kudo
If you start the cluster manually (so you start all services manually) you dont even need the slaves file and ssh. This is only needed if you use the start scripts. The datanode will contact its configured namenode on startup and "offer" his service. So if you started the datanode manually, you should check its log file and see why he is not able to contact the namenode.   br ... View more

Re: FATAL ha.ZKFailoverController: Unable to start...

by Expert Contributor in Support Questions
‎07-29-2014 04:35 PM
‎07-29-2014 04:35 PM
Thank you so much. Your answer is absolutely correct.   I went to each server and did   nn1:  service zookeeper-server init --myid=1 --force nn2:  service zookeeper-server init --myid=2 --force jt1:  service zookeeper-server init --myid=3 --force   earlier I had chosen an ID of 1 on every machine.   I also corrected my zoo.cfg. to ensure right entries.   Now it works and I am able to do    sudo -u hdfs hdfs zkfc -formatZK   Thank you so much!   ... View more

Re: Disaster Recovery questions

by Contributor in Support Questions
‎01-22-2014 12:36 PM
‎01-22-2014 12:36 PM
Thanks for your reply.   The facebook link was interesting to read.Unfortunately we have it a bit more complicated, since we are developing a product which gets installed in customers datacenters and has to work with minimal manual interaction without losing any data. (You want your mobile phone bills to be correct 😉 )   If we go down that road, I would indeed follow your advise to shut the replication down on the surviving cluster and use snapshots to restore the failed cluster when it comes back online.   Regards Marc   ... View more
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