You should never have a zookeeper cluster with only 2 members. That is perhaps the worst possible configuration. Everything goes down if either one of them fails. For clusters less than 10 nodes, I would suggest putting your zookeeper process on only one node -- collocated with your HDFS name node (since, if that goes down, your entire cluster is hosed anyway). Other good numbers for zookeeper nodes are 3, 5, and one per rack (always ensuring that you have an odd number of nodes as zookeeper nodes).
Dave -----Original Message----- From: rakshitrakesh [mailto:[email protected]] Sent: Monday, April 25, 2011 6:21 AM To: [email protected] Subject: HBase unable to find region servers Hello friends, I was using a hadoop cluster of apache hadoop (version 0.20.2) with apache hbase-0.20.6(2 regionservers) and apache zookeeper 3.3.1 (cluster of 2). I ran into problems when I replaced the apache hadoop 0.20.2 with CDH3(cloudera hadoop). When I started HBase everything started fine i.e. HMaster,HRegionServer etc. But the HBase master cannot find regionservers but I can see the Regionservers running. Can anyone please tell me what exactly is the problem and how to solve it??? Thanks, Rakesh Kumar Rakshit -- View this message in context: http://old.nabble.com/HBase-unable-to-find-region-servers-tp31470989p31470989.html Sent from the HBase User mailing list archive at Nabble.com.
