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From Cosmin Cătălin Sanda <cosmincata...@gmail.com>
Subject Re: HBase Master cannot be contacted by Region Servers
Date Wed, 09 Jul 2014 13:29:44 GMT
The port should not be needed if the default settings have not been
modified. I also don't see how that could be the problem since the
default hbase created structure is visible under hdfs. I will try that
nevertheless.
------------------------------------
Cosmin Catalin SANDA
Software Systems Engineer
Phone: +45.27.30.60.35



On Wed, Jul 9, 2014 at 3:24 PM, Wellington Chevreuil
<wellington.chevreuil@gmail.com> wrote:
> Hi,
>
> Had you already tried to set the port on hbase.rootdir for hbase-site.xml, like below:
>
>    <property>
>        <name>hbase.rootdir</name>
>        <value>hdfs://master:8020/hbase</value>
>    </property>
>
> Cheers.
>
> On 9 Jul 2014, at 14:18, Cosmin Cătălin Sanda <cosmincatalin@gmail.com> wrote:
>
>> I have a Hadoop cluster made of 3 slaves and 1 master on top of which
>> there is an HBase cluster with 3 RS and 1 master respectively.
>> Additionally there is a Zookeeper ensemble on 3 machines.
>>
>> The Hadoop cluster is functioning correctly as well as the Zookeeper
>> ensemble. However, the HBase cluster fails to initialize correctly.
>>
>> I start HBase it by running ./bin/start-hbase.sh. This correctly
>> starts the HBase Master and the Region Servers. The hbase folder in
>> hdfs is set-up correctly.
>>
>> jps on master
>>
>> hduser@master:~/hbase$ jps
>> 5694 HMaster
>> 3934 JobHistoryServer
>> 3786 NameNode
>> 3873 ResourceManager
>> 6025 Jps
>>
>> jps on slaves
>>
>> 5737 Jps
>> 5499 HRegionServer
>> 3736 DataNode
>> 3820 NodeManager
>>
>> However, the HBase master does not register the Region Servers as it
>> is also apparent from looking at the logs:
>>
>> master log
>>
>> [master:master:60000] master.ServerManager: Waiting for region servers
>> count to settle; currently checked in 0, slept for 1511 ms, expecting
>> minimum of 1, maximum of 2147483647, timeout of 4500 ms, interval of
>> 1500 ms.
>>
>> slave log
>>
>> [regionserver60020] regionserver.HRegionServer: reportForDuty to
>> master=master,60000,1404856451890 with port=60020,
>> startcode=1404856453874
>> [regionserver60020] regionserver.HRegionServer: error telling master we are up
>> com.google.protobuf.ServiceException:
>> org.apache.hadoop.net.ConnectTimeoutException: 20000 millis timeout
>> while waiting for channel to be ready for connect. ch :
>> java.nio.channels.SocketChannel[connection-pending
>> local=/10.0.2.15:53939 remote=master/192.168.66.60:60000]
>>
>> Here are the configuration details:
>>
>> /etc/hosts on master
>>
>> 192.168.66.63   slave-3 # Data Node and Region Server
>> 192.168.66.60   master # Name Node and HBase Master
>> 192.168.66.73   zookeeper-3 # Zookeeper node
>> 192.168.66.71   zookeeper-1 # Zookeeper node
>> 192.168.66.72   zookeeper-2 # Zookeeper node
>> 192.168.66.62   slave-2 # Data Node and Region Server
>> 192.168.66.61   slave-1 # Data Node and Region Server
>>
>> /etc/hosts on slave-1
>>
>> 192.168.66.60   master
>> 192.168.66.73   zookeeper-3
>> 192.168.66.71   zookeeper-1
>> 192.168.66.72   zookeeper-2
>>
>> hbase-site.xml on ALL cluster nodes
>>
>> <?xml version="1.0"?>
>> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
>> <configuration>
>>    <property>
>>        <name>hbase.tmp.dir</name>
>>        <value>/home/hduser/hbase/tmp</value>
>>    </property>
>>    <property>
>>        <name>hbase.rootdir</name>
>>        <value>hdfs://master/hbase</value>
>>    </property>
>>    <property>
>>        <name>hbase.cluster.distributed</name>
>>        <value>true</value>
>>    </property>
>>    <property>
>>        <name>hbase.local.dir</name>
>>        <value>/home/hduser/hbase/local</value>
>>    </property>
>>    <property>
>>        <name>hbase.master.info.port</name>
>>        <value>6010</value>
>>    </property>
>>    <property>
>>        <name>hbase.zookeeper.quorum</name>
>>        <value>zookeeper-1,zookeeper-2,zookeeper-3,</value>
>>    </property>
>> </configuration>
>>
>> regionservers file on master and slaves
>>
>> slave-3
>> slave-1
>> slave-2
>>
>> hbase-env.sh on master and slaves
>>
>> export JAVA_HOME=$(readlink -f /usr/bin/javac | sed "s:/bin/javac::"
>> export HBASE_OPTS="-XX:+UseConcMarkSweepGC"
>> export HBASE_MANAGES_ZK=false
>>
>> What am I doing wrong so that the nodes cannot talk to each other?
>>
>> I am using Hadoop 2.4.0 and HBase 0.98.3 along with Zookeeper 3.4.6 on
>> Ubuntu Trusty Tahr x64.
>

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