Regards, Jason.
Answers in line
On 09/13/2012 06:42 PM, Jason Huang wrote:
Hello,
I am trying to set up HBase at pseudo-distributed mode on my Macbook.
I was able to installed hadoop and HBase and started the nodes.
$JPS
5417 TaskTracker
5083 NameNode
5761 HRegionServer
5658 HMaster
6015 Jps
5613 HQuorumPeer
5171 DataNode
5327 JobTracker
5262 SecondaryNameNode
However, when I tried ./hbase shell I got the following error:
Trace/BPT trap: 5
Loooking at the log from master server I found:
2012-09-13 18:33:46,842 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
Looked up root region location,
connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@13d21d6;
serverName=192.168.1.124,60020,1347575067207
2012-09-13 18:34:18,981 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
Looked up root region location,
connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@13d21d6;
serverName=192.168.1.124,60020,1347575067207
2012-09-13 18:34:18,982 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
locateRegionInMeta parentTable=-ROOT-,
metaLocation={region=-ROOT-,,0.70236052, hostname=192.168.1.124,
port=60020}, attempt=14 of 100 failed; retrying after sleep of 32044
because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1347575458668/Put/vlen=19/ts=0,
.META.,,1/info:serverstartcode/1347575458668/Put/vlen=8/ts=0}
I don't quite understand what this error is and how to fix it. Any
suggestions? Thanks!
Here are my config files:
<configuration>
<property>
<name>hbase.rootdir</name>
<value>hdfs://localhost:9000/hbase</value>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>localhost</value>
</property>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
If you want to use HBase in pseudo-distributed mode, you can not put
this property here, because the HRegionMaster thinks that the cluster is
on full distributed mode, and tries to find the region servers, and this
error come to light because in pseudo-distributed mode, you don´t have
to include that.
So, remove the hbase.cluster.distributed property, and restart all daemons.
Another thing, for the pseudo-distributed mode, you don´t need a running
ZooKeeper cluster, you need that for a full distributed cluster.
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>hbase.master</name>
<value>localhost:60000</value>
</property>
<property>
<name>dfs.support.append</name>
<value>true</value>
</property>
</configuration>
hdfs-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>localhost:9000</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/Users/jasonhuang/hdfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>/Users/jasonhuang/hdfs/data</value>
</property>
<property>
<name>dfs.datanode.max.xcievers</name>
<value>4096</value>
</property>
</configuration>
mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>localhost:9001</value>
</property>
<property>
<name>mapred.child.java.opts</name>
<value>-Xmx512m</value>
</property>
<property>
<name>mapred.job.tracker</name>
<value>hdfs://localhost:54311</value>
</property>
</configuration>
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