Yet Another Hadoop Word Count Tutorial

Here is another Word Count count Hadoop tutorial. Why? You ask. It is a learning exercise for me. I am writing it out so that I can refer to it … Continue Reading →

java.lang.NoClassDefFoundError: …/guava/common/primitives/UnsignedBytes

No idea why this happened today on a Hadoop project which was running fine till now. java.lang.NoClassDefFoundError: org/apache/hadoop/thirdparty/guava/common/primitives/UnsignedBytes    at org.apache.hadoop.io.FastByteComparisons$LexicographicalComparerHolder $UnsafeComparer.compareTo(FastByteComparisons.java:226)    at org.apache.hadoop.io.FastByteComparisons$LexicographicalComparerHolder $UnsafeComparer.compareTo(FastByteComparisons.java:113)    at org.apache.hadoop.io.FastByteComparisons.compareTo(FastByteComparisons.java:42)    at org.apache.hadoop.io.WritableComparator.compareBytes(WritableComparator.java:150)    at org.apache.hadoop.io.Text$Comparator.compare(Text.java:306)    … Continue Reading →

IBM BigInsights Web Console Issue With BigDataUniversity VM

BigInsights web console error in IBM Infosphere BigInsights VM usually occurs because web console is not running. It can be started by executing start.sh which can be found in /opt/ibm/biginsights/bin. … Continue Reading →

Find the version of Ubuntu you are running

How do you find the version of Ubuntu you are running? There are two ways to do this. One is by GUI and the other by terminal. This is the … Continue Reading →

Cloudera VirtualBox boot error NET: Registered protocol family 2

I downloaded Cloudera CDH3 Virtual Machine for VirtualBox to have a readymade Hadoop environment to experiment with. While booting the VM I got an error and the boot sequence stalled. … Continue Reading →

Install classic desktop in Ubuntu 11.10

Ubuntu 11.10 does not include classic GNOME desktop by default. And if you are like me then you want to get rid of Unity as soon as you log on. … Continue Reading →

Issue Starting Oracle XE on Ubuntu

Installing Oracle XE on Ubuntu was a breeze. I downloaded the package and executed it. Ubuntu Software Center kicked in and performed the installation. The issue I faced was when … Continue Reading →

Blogilo Error On Ubuntu: Cannot connect to database

After installing Blogilo through Synaptic Package Manager I got an error when I ran Blogilo. The error is "Cannot connect to database". The way to resolve the issue is to … Continue Reading →