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Date: Sun, 25 Aug 2013 19:59:43 +0800
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Subject: HBase Java client - unknown host: localhost.localdomain
From: Shengjie Min <shengjie.min@gmail.com>
To: user@hbase.apache.org
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Hi guys,

I am running cloudera quick start vm:

Versions:

Hadoop: 2.0.0-cdh4.3.1

HBase: 0.94.6-cdh4.3.1

Here is my little remote HBase Java client(HbaseClient.java), all it does
is:

public static void main(String[] args) throws IOException {
    Configuration config = HBaseConfiguration.create();
    HTable table = new HTable(config, "s1");
    System.out.println(table.getTableName());
}

hbase-site.xml:

<property>
    <name>hbase.rootdir</name>
    <value>hdfs://172.16.144.150:8020/hbase</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>172.16.144.150</value>
  </property>

When I run my java client, I get the error unknown host:
localhost.localdomain:

Initiating client connection, connectString=172.16.144.150:2181
sessionTimeout=60000 watcher=hconnection
zookeeper.disableAutoWatchReset is false
The identifier of this process is 41939@smin-MacBook-Pro.local
Opening socket connection to server cloudera/172.16.144.150:2181. Will
not attempt to authenticate using SASL (unknown error)
Socket connection established to cloudera/172.16.144.150:2181,
initiating session
Session establishment request sent on cloudera/172.16.144.150:2181
Session establishment complete on server cloudera/172.16.144.150:2181,
sessionid = 0x14076b058850045, negotiated timeout = 60000
hconnection Received ZooKeeper Event, type=None, state=SyncConnected, path=null
hconnection-0x14076b058850045 connected

locateRegionInMeta parentTable=-ROOT-,
metaLocation={region=-ROOT-,,0.70236052,
hostname=localhost.localdomain, port=60020},
attempt=0 of 10 failed; retrying after sleep of 1000 because:
unknown host: localhost.localdomain

Reading reply sessionid:0x14076b058850045, packet:: clientPath:null
serverPath:null finished:false header:: 17,3  replyHeader:: 17,460,0
request:: '/hbase,F  response::
s{20,20,1376375496826,1376375496826,0,32,0,0,0,12,430}
Reading reply sessionid:0x14076b058850045, packet:: clientPath:null
serverPath:null finished:false header:: 18,4  replyHeader:: 18,460,0
request:: '/hbase/root-region-server,T  response::
#ffffffff0001b3635323630406c6f63616c686f73742e6c6f63616c646f6d61696e6c6f63616c686f73742e6c6f63616c646f6d61696e2c36303032302c31333737333538373930303037,s{430,430,1377358805621,1377358805621,0,0,0,0,73,0,430}
hconnection-0x14076b058850045 Retrieved 41 byte(s) of data from znode
/hbase/root-region-server and set watcher;
localhost.localdomain,60020,1...
Looked up root region location,
connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@68a7a3a7;
serverName=localhost.localdomain,60020,1377358790007

locateRegionInMeta parentTable=.META., metaLocation=null, attempt=2 of
10 failed;
retrying after sle

Any ideas?

Thanks,

SHengjie

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