org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory already exists

Sqoop job fails, complains that Output directory already exists: [cloudera@quickstart ~]$ sudo -u hdfs sqoop job --meta-connect jdbc:hsql...

IntelliJ Idea keyboard shortcuts in Eclipse

I've used InteliJ idea for development, but now I have to use Eclipse. It's quite pity, because I've forgot almost all ecli...

Hadoop Distributed File System (HDFS)

Hadoop Distributed File System (HDFS) is a Java-based file system that provides scalable and reliable data storage that is designed to span...

[BASH] Add folder to $PATH if not there already

if [[ ":$PATH:" != *":/some/folder:"* ]]; then PATH=${PATH}:/some/folder; fi

Maven jetty:run in intellij idea: java.lang.OutOfMemoryError: PermGen space

Often time, IntelliJ Idea with maven jetty plugin may hits the following  java.lang.OutOfMemoryError: PermGen space  error when trying to...

Spring: how to print all bean names from ApplicationContext?

How to get all bean ids from the Spring Application Context and print to console. Needed sometimes for debugging purposes :) 1 2 3 4 ...

Expose POJO as MBean in Spring (JMX)

There are lots of tutorials for this purpose (for example: this link ), but I was not able to figure out working solution from the spot. ...