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From SACHINGUPTA <sac...@datametica.com>
Subject Re: Access hbase remotely from java client
Date Mon, 29 Sep 2014 15:21:35 GMT
'hostname' command returns localhost.localdomain
I am having a cloudera quick start vm so i am using that as my cluster 
so whatever cloudera provides i have it.

And i am trying to access the hbase of cloudera vm remotely
On Monday 29 September 2014 08:38 PM, Sean Busbey wrote:
> What does the "hostname" command return on the master?
>
> Do you have any backup-masters configured?
>
> What is the contents of your regionservers file?
>
> On Mon, Sep 29, 2014 at 9:55 AM, SACHINGUPTA <sachin@datametica.com> wrote:
>
>> yes
>>
>> On Monday 29 September 2014 08:18 PM, Sean Busbey wrote:
>>
>>> Does the IP you listed properly handle DNS resolution? You should make
>>> sure
>>> forward and reverse look up work properly for hosts used.
>>>
>>> Generally you should also configure things via host name and not IP
>>> address.
>>>
>>> On Mon, Sep 29, 2014 at 8:17 AM, SACHINGUPTA <sachin@datametica.com>
>>> wrote:
>>>
>>>   java client
>>>> package com.example.hbaseconnect.HBaseConnect;
>>>>
>>>> import java.io.IOException;
>>>>
>>>> import org.apache.hadoop.conf.Configuration;
>>>> import org.apache.hadoop.hbase.HBaseConfiguration;
>>>> import org.apache.hadoop.hbase.client.HBaseAdmin;
>>>> import org.apache.hadoop.hbase.client.HTable;
>>>> import org.apache.hadoop.hbase.client.Scan;
>>>>
>>>> public class HBaseConnect {
>>>>       public static void main(String[] args) throws IOException {
>>>>           Configuration conf = HBaseConfiguration.create();
>>>>           conf.clear();
>>>>           conf.addResource("hbase-site.xml");
>>>>           conf.set("hbase.zookeeper.quorum","10.255.1.61");
>>>>           conf.set("hbase.zookeeper.property.clientPort","2181");
>>>>           conf.set("hbase.master", "10.255.1.61:60010");
>>>>
>>>>           HBaseAdmin.checkHBaseAvailable(conf);
>>>>           System.out.println("connected to hbase");
>>>>           HTable table = new HTable(conf, "bunty");
>>>>           Scan scan = new Scan();
>>>>       }
>>>> }
>>>>
>>>>
>>>> client side hbase-site.xml
>>>>
>>>> <?xml version="1.0" encoding="UTF-8"?>
>>>>
>>>> <!--Autogenerated by Cloudera CM on 2014-08-28T02:35:59.408Z-->
>>>> <configuration>
>>>>     <property>
>>>>       <name>hbase.rootdir</name>
>>>>       <value>hdfs://10.255.1.61:8020/hbase</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.client.write.buffer</name>
>>>>       <value>2097152</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.client.pause</name>
>>>>       <value>1000</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.client.retries.number</name>
>>>>       <value>10</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.client.scanner.caching</name>
>>>>       <value>1</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.client.keyvalue.maxsize</name>
>>>>       <value>10485760</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.rpc.timeout</name>
>>>>       <value>60000</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.security.authentication</name>
>>>>       <value>simple</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>zookeeper.session.timeout</name>
>>>>       <value>60000</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>zookeeper.znode.parent</name>
>>>>       <value>/hbase</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>zookeeper.znode.rootserver</name>
>>>>       <value>root-region-server</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.zookeeper.quorum</name>
>>>>       <value>10.255.1.61</value>
>>>>     </property>
>>>>     <property>
>>>>       <name>hbase.zookeeper.property.clientPort</name>
>>>>       <value>2181</value>
>>>>     </property>
>>>> </configuration>
>>>>
>>>>
>>>> On Monday 29 September 2014 06:35 PM, Wellington Chevreuil wrote:
>>>>
>>>>   Hi,
>>>>> You should not do this, as localhost should resolve to the own host.
>>>>> This
>>>>> is probably some missing property on the clients hbase configuration
>>>>> (make
>>>>> sure you have a proper hbase-site.xml on client's classpath or set
>>>>> configuration programatically). As a start, check if you had set the
>>>>> properties below on your client's hbase config.
>>>>>
>>>>>     <property>
>>>>>        <name>hbase.zookeeper.quorum</name>
>>>>>        <value>ZK_HOSTS</value>
>>>>>      </property>
>>>>>      <property>
>>>>>        <name>hbase.zookeeper.property.clientPort</name>
>>>>>        <value>2181</value>
>>>>>      </property>
>>>>>
>>>>>
>>>>> On 29 Sep 2014, at 13:43, SACHINGUPTA <sachin@datametica.com> wrote:
>>>>>
>>>>>    Hello guys
>>>>>
>>>>>> I am using the hbase java api to connect to hbase remotely, but when
I
>>>>>> executed the java code, got |MasterNotRunningException|. When I
>>>>>> debugged
>>>>>> the code, I came to know that zookeeper was returning the address
of
>>>>>> hmaster as localhost.localdomain, so the client was trying to search
>>>>>> for
>>>>>> the hmaster locally. When I changed the |/etc/hosts| file of my local
>>>>>> machine from where i am running the java client as:
>>>>>>
>>>>>> |<ip of the master>  localhost.localdomain|
>>>>>>
>>>>>> then it worked fine.
>>>>>>
>>>>>> However, I think that this is not the right way. I think I have to
>>>>>> change the addresses somewhere in the configuration of zookeeper,
but
>>>>>> I did
>>>>>> not get it.
>>>>>>
>>>>>> please help
>>>>>> thanks
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Thanks
>>>>>> Sachin Gupta
>>>>>>
>>>>>>
>>>>>>   --
>>>> Thanks
>>>> Sachin Gupta
>>>>
>>>>
>>>>
>> --
>> Thanks
>> Sachin Gupta
>>
>>
>

-- 
Thanks
Sachin Gupta


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