Hi Madhvaraj,
   Its not required to compile everytime, as you have followed the steps in 
<https://wiki.apache.org/hadoop/HowToContribute>.
You can go to specific project and run " mvn clean install"

Regards,
+ Naga
________________________________________
From: Madhvaraj Shetty [madresearch2...@gmail.com]
Sent: Tuesday, November 15, 2016 17:06
To: general@hadoop.apache.org
Subject: Hadoop source code modification.

Hello,

I am working in the area of hadoop, especially i want to improve hadoop
security.

So i need procedure  for modifying hadoop source code.
I have visited this <https://wiki.apache.org/hadoop/HowToContribute>and
able to compile hadoop from the source code, but i need to modify the part
of the code.

Is it compulsory to compile the whole hadoop, can i compile/debug a part of
it. Any steps for that.


Thank you.

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