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From Chandrashekhar Kotekar <shekhar.kote...@gmail.com>
Subject Re: Could not resolve the DNS name of slave2:60020
Date Thu, 31 Jul 2014 06:24:07 GMT
This is how /etc/hosts file looks like on HBase master node

ubuntu@master:~$ cat /etc/hosts
10.78.21.133 master
#10.62.126.245 slave1
#10.154.133.161 slave1
10.224.115.218 slave1
10.32.213.195 slave2

and the code which actually tries to connect is as shown below:

hTableInterface=hTablePool.getTable("POINTS_TABLE");



Regards,
Chandrash3khar Kotekar
Mobile - +91 8600011455


On Wed, Jul 30, 2014 at 6:43 PM, Jean-Marc Spaggiari <
jean-marc@spaggiari.org> wrote:

> Hi Chandrash,
>
> What do you have in your /etc/hosts? Can you also share the piece of code
> where you are doing the connection to HBase?
>
> Thanks,
>
> JM
>
>
> 2014-07-30 7:34 GMT-04:00 Chandrashekhar Kotekar <
> shekhar.kotekar@gmail.com>
> :
>
> > I have a HBase cluster on AWS. I have written few REST services which are
> > supposed to connect to this HBase cluster and get some data.
> >
> > My configuration is as below :
> >
> >    1. Java code, eclipse, tomcat running on my desktop
> >    2. HBase cluster, Hadoop cluster sitting on AWS
> >    3. Can connect to HBase cluster, Hadoop cluster ONLY THROUGH VPN
> >
> > Whenever web service tries to do ANY operation on HBase, it throws Could
> > not resolve the DNS name of slave2:60020 error with following stack
> trace.
> >
> >
> > java.lang.IllegalArgumentException: Could not resolve the DNS name of
> > slave2:60020
> >     at
> >
> org.apache.hadoop.hbase.HServerAddress.checkBindAddressCanBeResolved(HServerAddress.java:105)
> >     at
> > org.apache.hadoop.hbase.HServerAddress.<init>(HServerAddress.java:66)
> >     at
> >
> org.apache.hadoop.hbase.zookeeper.RootRegionTracker.dataToHServerAddress(RootRegionTracker.java:82)
> >     at
> >
> org.apache.hadoop.hbase.zookeeper.RootRegionTracker.waitRootRegionLocation(RootRegionTracker.java:73)
> >     at
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:578)
> >     at
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:558)
> >     at
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:687)
> >     at
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:589)
> >
> >  at
> >
> org.apache.hadoop.hbase.client.HTablePool.createHTable(HTablePool.java:129)
> >     at
> > org.apache.hadoop.hbase.client.HTablePool.getTable(HTablePool.java:96)
> >     at com.shekhar.dao.AdminDAO.getAdminInfoByRowKey(AdminDAO.java:63)
> >     at
> com.shekhar.auth.Authorization.isSystemAdmin(Authorization.java:41)
> >     at
> >
> com.shekhar.business.ReadingProcessor.getReadingInfo(ReadingProcessor.java:310)
> >     at
> > com.shekhar.services.ReadingService.getReadings(ReadingService.java:543)
> >     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >
> >
> >
> >
> > In hbase-site.xml file I have given IP address of HBase master and in
> > core-site.xml file IP address of namenode is given.
> >
> > Has anyone faced this type of problem? Why this problem arises?
> >
> > I have posted same question on Stack overflow but no one replied hence
> > posting question here.
> >
> > Request you to please help.
> >
> >
> >
> > Regards,
> > Chandrash3khar Kotekar
> > Mobile - +91 8600011455
> >
>

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