Java Serialization concept & Example Part II

December 28, 2013 5 Comments JBT

In first part we have discussed what is serialization and how to achieve it in Java. In this article, we will discuss some advanced topics covering Serialization.

Core Java

Java serialization concept and Example

December 28, 2013 18 Comments JBT

Here I will learn and teach you what is Serialization in Java and how to write code for the same.

Hadoop

Format aborted in /app/hadoop/tmp/dfs/name

December 18, 2013 4 Comments JBT

While startng the Hadoop i was just trying to format the filesystem. For that i have executed below command. bin/hadoop namenode -format But i am getting below error while doing this. Could you please let me know what could be the reason behind this. Warning: $HADOOP_HOME is deprecated. 13/08/10 13:52:56 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG:… Continue reading →

Hadoop

Hadoop Interview Question

December 18, 2013 0 Comment JBT

What is the difference between start-all.sh and start-dfs.sh in Hadoop There are different scripts in bin dir in Hadoop which is used to launch Hadoop DFS and Hadoop Map/Reduce Daemons. start-dfs.sh – Starts the Hadoop DFS daemons (Namenode and Datanodes) stop-dfs.sh – Stops the Hadoop DFS daemons (Namenode and Datanodes) start-all.sh – Starts all Hadoop daemons (Namenode, datanodes,… Continue reading →

Spring

Spring Transaction Management Tutorial

October 13, 2013 8 Comments JBT

What is Transaction Management The sequence of activities that will be performed to complete database operation and its management is known as Transaction Management. All these actions in combination will be treated as ONE action only. So that DB doesn’t fall in inconsistent mode ever. For more details, you can search for ACID property of… Continue reading →

Spring