Hi Aleks, thanks for the notes. I have fixed the problem, which is I didnt specify hbase.zookeeper.quorum explicitly in my setup. Once I fixed that, hbase works well. (It looks in standalone mode, this property is not mandatory...) Regards, Richard
On Tue, Sep 18, 2012 at 12:20 PM, Aleksandr Shulman <[email protected]>wrote: > Hi Richard, > > Are you running zookeeper-server? The default port on which ZK listens is > 2181 and so it may also be worth doing a netstat -ap | grep 2181 to see if > it is up. > > Can you also post your hbase-site.xml configs? > > Thanks, > > Aleks S. > Cloudera > > On Tue, Sep 18, 2012 at 9:09 AM, Richard Tang <[email protected] > >wrote: > > > Hi, All, > > I have some problems in setting up distributed hbase cluster. My setup > is a > > 3-node hbase cluster, (node3 for hmaster and zk, and node4/5 for > > regionservers). It is attached with a 3-node hdfs cluster (node 6 for > > namenode, and node7/8 for datanodes). Passphrase-less ssh have been setup > > from node3 to node4 (and from node3 to node5) and from node6 to node7 > (and > > from node6 to node8). > > > > When I start hbase from node3, I have following error found in hbase log > > files. > > > > @node3 > > 2012-09-18 08:23:11,523 INFO > > org.apache.zookeeper.server.PrepRequestProcessor: Got user-level > > KeeperException when processing sessionid:0x139d9c2d4a50000 type:create > > cxid:0x8 zxid:0x1d3 txntype:-1 reqpath:n/a Error Path:/hbase/master > > Error:KeeperErrorCode = NodeExists for /hbase/master > > > > @node4 > > 2012-09-18 08:23:27,328 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 > > for server null, unexpected error, closing socket connection and > attempting > > reconnect > > java.net.ConnectException: Connection refused > > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > > at > > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:592) > > at > > > > > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:286) > > at > > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1035) > > 2012-09-18 08:23:27,429 WARN > > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly > transient > > ZooKeeper exception: > > org.apache.zookeeper.KeeperException$ConnectionLossException: > > KeeperErrorCode = ConnectionLoss for /hbase/master > > 2012-09-18 08:23:27,429 ERROR > > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: ZooKeeper exists > > failed after 3 retries > > 2012-09-18 08:23:27,429 WARN org.apache.hadoop.hbase.zookeeper.ZKUtil: > > regionserver:60020 Unable to set watcher on znode /hbase/master > > org.apache.zookeeper.KeeperException$ConnectionLossException: > > KeeperErrorCode = ConnectionLoss for /hbase/master > > at > > org.apache.zookeeper.KeeperException.create(KeeperException.java:99) > > at > > org.apache.zookeeper.KeeperException.create(KeeperException.java:51) > > at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1021) > > at > > > > > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:154) > > at > > > > > org.apache.hadoop.hbase.zookeeper.ZKUtil.watchAndCheckExists(ZKUtil.java:226) > > at > > > > > org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:76) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegionServer.initializeZooKeeper(HRegionServer.java:563) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegionServer.preRegistrationInitialization(HRegionServer.java:532) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:634) > > at java.lang.Thread.run(Thread.java:679) > > > > I have managed to run hbase under single-node configuration (with the > same > > system setup), without problems. Please let me know the possible cause or > > howto for approaching the problem cause. > > > > Regards, > > Richard > > > > > > -- > Best Regards, > > Aleks Shulman > 847.814.5804 > Cloudera >
