It works now, thanks. My configuration had a conflict between clientPort and one of the server ports.
Jun IBM Almaden Research Center K55/B1, 650 Harry Road, San Jose, CA 95120-6099 jun...@almaden.ibm.com Patrick Hunt <ph...@apache.org> wrote on 04/13/2009 01:45:08 PM: > > Jun Rao wrote: > > > > From the ZK web site, it's not clear how to set up a multi-node ZK service. > > It seems that one has to add the server entries in the conf file and create > > myid files on each node. Then, how should I start the ZK nodes? I tried > > issuing "zkServer start" from each node and that didn't seem to work. Is > > that the right way to start the service? Also, once the service is up, is > > there a way to check the list of nodes used by ZK and which node is the > > leader? Thanks, > > > > See this for a step-by-step guide: > http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin. > html#sc_zkMulitServerSetup > In particular steps 4 & 5. > > your config should look something like (for 3 server ensemble): > tickTime=2000 > dataDir=/path/to/data/dir > clientPort=2181 > initLimit=5 > syncLimit=2 > server.1=host1.foo.com:2888:2889 > server.2=host2.foo.com:2888:2889 > server.3=host3.foo.com:2888:2889 > > this file needs to exist (available to) each of the servers in the > ensemble. Try the command line listed in step 5 to start the server > (conf in the classpath is there to pickup the log4j configuration, you > could use that to debug). The myid file needs to exist in each server's > dataDir (not shared of course). > > Either JMX, the logs, or the stat command documented here: > http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin. > html#sc_zkCommands > will give insight on things like which server is the leader. The stat > command is the simplest (nc to the clientPort of the server and issue > the stat command). > > Patrick >