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From Job <...@gridline.nl>
Subject Re: Creating HBase connection to remote Master
Date Fri, 17 Dec 2010 16:07:58 GMT
Fixed! That did the trick: my local logging on debug revealed that i was
actually using hbase from mahout 0.4 - it was hiding on the classpath in
my multi module maven setup.

thanks,

Job

On vr, 2010-12-17 at 11:30 +0000, Friso van Vollenhoven wrote:
> Hi Job,
> 
> Is lookup setup correctly, such that the nodes can do forward and reverse lookup for
the IPs in the cluster? Just put all nodes in /etc/hosts on all machines (quite doable for
a 2 node cluster).
> 
> If you switch HBase (and Zookeeper) logging to DEBUG, you may see a bit more of what
does and does not happen.
> 
> Hope this helps.
> 
> 
> Friso
> 
> 
> 
> On 17 dec 2010, at 11:24, Job wrote:
> 
> > Hi,
> > 
> > I have setup a simple 2 node cluster using cloudera's distribution CDh3
> > of hadoop, hbase and zookeeper. 
> > The system seems to be running fine. (http://192.168.10.139:60010 show
> > that the master is running with one regionserver, the 'zk dump' shows
> > the master address: "Master address: 192.168.10.139:60000" 
> > 
> > On the server if check the HBase shell status, it looks all fine. I can
> > telnet from my own host to the master's IP: 192.168.10.139:60000
> > 
> > But next, from my code (using the same versions of the libs) when I try
> > create a connection to this server:
> > 
> > HBaseConfiguration config = new HBaseConfiguration();
> > config.set("hbase.zookeeper.quorum", zookeeper);
> > admin = new HBaseAdmin(config);
> > 
> > The log tells me, that the zookeeper session is being created (which
> > indeed shows up in de zk-dump and log on the server) but hangs on
> > 'getMaster':
> > 
> > org.apache.hadoop.hbase.client.HConnectionManager$TableServers -
> > getMaster attempt 0 of 10 failed; retrying after sleep of 2000
> > 
> > etc.
> > 
> > It never receives the actual connection, also it doesn't tell if it
> > could retrieve the master address, and if it tries to connect to the
> > correct server.
> > 
> > Any idea what can be wrong here? - or pointers to where I should look
> > for debugging the problem. 
> > 
> > Thanks!
> > 
> > Job
> > 
> 

-- 
Drs. Job Tiel Groenestege
GridLine - Intranet en Zoeken

GridLine
Keizersgracht 520
1017 EK Amsterdam

www: http://www.gridline.nl
mail: job@gridline.nl
tel: +31 20 616 2050
fax: +31 20 616 2051

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