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i am willing to learn hadoop as a Developer , but i am confused over the prerequisite of learning it.? is having a good experience in java programming very essential to learn hadoop? I have 4 years of experience in application development in LAMP.
But i am not in touch with java programming as a part…
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Full list of error:
hb@localhost:/etc/hadoop/conf$ sudo service hadoop-hdfs-namenode start
* Starting Hadoop namenode:
starting namenode, logging to /var/log/hadoop-hdfs/hadoop-hdfs-namenode-localhost.out
12/09/10 14:41:09 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG:…
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Introduction
An attempt to combine HBase and HDFS results in the following:
2014-06-09 00:15:14,777 WARN org.apache.hadoop.hbase.HBaseFileSystem: Create Dir
ectory, retries exhausted
2014-06-09 00:15:14,780 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled
exception. Starting shutdown.
java…
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I compiling with Solaris 10 SPARC, jdk 1.6 from Sun, Ant 1.7.1 from OpenCSW.
I have no problem running hadoop 0.17.2.1
However, I have problem compiling/integrating hive with the error 'cannot find symbol', although I followed the tutorial.
I have the hive source code from SVN exactly from tutorial…
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I'm new to hadoop and is in learning phase.
As per Hadoop Definitve guide, i have set up my hadoop in pseudo distributed mode and everything was working fine. I was even able to execute all the examples from chapter 3 yesterday. Today, when i rebooted my unix and tried to run start-dfs.sh and then…
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Introduction
An attempt to combine HBase and HDFS results in the following:
2014-06-09 00:15:14,777 WARN org.apache.hadoop.hbase.HBaseFileSystem: Create Dir
ectory, retries exhausted
2014-06-09 00:15:14,780 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled
exception. Starting shutdown.
java…
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Problem
The first aim was to run HBase standalone. Navigating to ip:60010/master-status is succesfull once HBase has been started.
The second aim is to run a distinct ZooKeeper quorum. ZooKeeper has been downloaded and has been started:
netstat -nato | grep 2181
tcp 0 0 :::2181 …
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Say I have "user". It's the key. And I need to keep "user count".
I am planning to have record with key "user" and value "0" to "9999+ ;-)" (as many as I'll have).
What problems I will drive in if I use Cassandra, HBase or MySQL for that?
Say, I have thousand of new updates to this "user" key, where…
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I'm working on a project with a friend that will utilize Hbase to store it's data. Are there any good query examples? I seem to be writing a ton of Java code to iterate through lists of RowResult's when, in SQL land, I could write a simple query. Am I missing something? Or is Hbase missing something…
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Coming from a SQL Server background, I'm a newbie with regard to HBase, but the technology looks to be a good fit for what we're doing and the cost is definitely right!
I need to maintain a list of log entries which normally I would create in an RDBS as:
create table Log
(
UserID int, SiteID…
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