When I first started my hbase cluster, it too gave me the nonode for /hbase/master several times before it started working, and I believe this is a common beginner's error (I've seen it in a few emails in the past 2 weeks).
What versions of HBase, Hadoop and ZooKeeper are you using? Also, take a look in your HBASE_HOME/logs folder. That would be a good place to start looking for some answers. -Mark -----Original Message----- From: Something Something [mailto:[email protected]] Sent: Friday, December 04, 2009 2:28 AM To: [email protected] Subject: Starting HBase in fully distributed mode... Hello, I am trying to get Hadoop/HBase up and running in a fully distributed mode. For now, I have only *1 Master & 2 Slaves*. The Hadoop starts correctly.. I think. The only exception I see in various log files is this one... org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot delete /ebs1/mapred/system,/ebs2/mapred/system. Name node is in safe mode. The ratio of reported blocks 0.0000 has not reached the threshold 0.9990. *Safe mode will be turned off automatically*. at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.deleteInternal(FSNamesystem.java:1696) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:1676) at org.apache.hadoop.hdfs.server.namenode.NameNode.delete(NameNode.java:517) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) Somehow this doesn't sound critical, so I assumed everything was good to go with Hadoop. So then I started HBase and opened a shell (hbase shell). So far everything looks good. Now when I try to run a 'list' command, I keep getting this message: Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = *NoNode for /hbase/master* at org.apache.zookeeper.KeeperException.create(KeeperException.java:102) at org.apache.zookeeper.KeeperException.create(KeeperException.java:42) at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:892) at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKeeperWrapper.java:328) Here's what I have in my *Master hbase-site.xml* <configuration> <property> <name>hbase.rootdir</name> <value>hdfs://master:54310/hbase</value> </property> <property> <name>hbase.cluster.distributed</name> <value>true</value> </property> <property> <name>hbase.zookeeper.property.clientPort</name> <value>2181</value> </property> <property> <name>hbase.zookeeper.quorum</name> <value>master,slave1,slave2</value> </property> <property> The *Slave *hbase-site.xml are set as follows: <property> <name>hbase.rootdir</name> <value>hdfs://master:54310/hbase</value> </property> <property> <name>hbase.cluster.distributed</name> <value>false</value> </property> <property> <name>hbase.zookeeper.property.clientPort</name> <value>2181</value> </property> In the hbase-env.sh file on ALL 3 machines I have set the JAVA_HOME and set the HBase classpath as follows: export HBASE_CLASSPATH=$HBASE_CLASSPATH:/ebs1/hadoop-0.20.1/conf On *Master* I have added Master & Slaves IP hostnames to *regionservers* file. On *slaves*, the regionservers file is empty. I have run hadoop namenode -format multiple times, but still keep getting.. "NoNode for /hbase/master". What step did I miss? Thanks for your help. This email message and any attachments are for the sole use of the intended recipients and may contain proprietary and/or confidential information which may be privileged or otherwise protected from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy the original message and any copies of the message as well as any attachments to the original message.
