Hi, Literally, it means that ZooKeeper is there but the hbase client can't find the hbase master address in it. By default, the node used is /hbase/master, and it contains the hostname and port of the master.
You can check its content in ZK by doing a "get /hbase/master" in bin/zkCli.sh (see http://zookeeper.apache.org/doc/r3.4.3/zookeeperStarted.html#sc_ConnectingToZooKeeper ). There should be a root cause for this, so it worths looking for other error messages in the logs (master especially). N. On Fri, Apr 13, 2012 at 1:23 AM, Henri Pipe <henri.p...@gmail.com> wrote: > "client.HConnectionManager$HConnectionImplementation: ZooKeeper available > but no active master location found" > > Having a problem with master startup that I have not seen before. > > running the following packages: > > hadoop-hbase-0.90.4+49.137-1 > hadoop-0.20-secondarynamenode-0.20.2+923.197-1 > hadoop-hbase-thrift-0.90.4+49.137-1 > hadoop-zookeeper-3.3.4+19.3-1 > hadoop-0.20-datanode-0.20.2+923.197-1 > hadoop-0.20-namenode-0.20.2+923.197-1 > hadoop-0.20-tasktracker-0.20.2+923.197-1 > hadoop-hbase-regionserver-0.90.4+49.137-1 > hadoop-zookeeper-server-3.3.4+19.3-1 > hadoop-0.20-0.20.2+923.197-1 > hadoop-0.20-jobtracker-0.20.2+923.197-1 > hadoop-hbase-master-0.90.4+49.137-1 > [root@ip-10-251-27-130 logs]# java -version > java version "1.6.0_31" > Java(TM) SE Runtime Environment (build 1.6.0_31-b04) > Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode) > > I start master and region server on another node. > > Master is initialized, but as soon as I try to check the master_status or > do a zkdump via web interface, it blows up with: > > 2012-04-12 19:16:10,453 INFO > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: > ZooKeeper available but no active master location found > 2012-04-12 19:16:10,453 INFO > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: > getMaster attempt 10 of 10 failed; retrying after sleep of 16000 > > I am running three zookeepers: > > # The number of milliseconds of each tick > tickTime=2000 > # The number of ticks that the initial > # synchronization phase can take > initLimit=10 > # The number of ticks that can pass between > # sending a request and getting an acknowledgement > syncLimit=5 > # the directory where the snapshot is stored. > dataDir=/mnt/zookeeper > # The maximum number of zookeeper client connections > maxClientCnxns=2000 > # the port at which the clients will connect > clientPort=2181 > server.1=10.251.27.130:2888:3888 > server.2=10.250.9.220:2888:3888 > server.3=10.251.110.50:2888:3888 > > I can telnet to the zookeepers just fine. > > Here is my hbase-site.xml file: > > <configuration> > <property> > <name>hbase.rootdir</name> > <value>hdfs://namenode:9000/hbase</value> > </property> > <property> > <name>hbase.cluster.distributed</name> > <value>true</value> > </property> > <property> > <name>hbase.zookeeper.quorum</name> > <value>10.251.27.130,10.250.9.220,10.251.110.50</value> > </property> > <property> > <name>hbase.zookeeper.property.dataDir</name> > <value>/hadoop/zookeeper/data</value> > </property> > <property> > <name>hbase.zookeeper.property.maxClientCnxns</name> > <value>2000</value> > <final>true</final> > </property> > </configuration> > > Any thoughts? Any help is greatly appreciated. > > Thanks > > Henri Pipe >
