title: How to solve the error when compile the hadoop2.7.3?
body: <p>The software I used as following: 
  <a href="https://i.stack.imgur.com/CIu0c.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CIu0c.png" alt="the version"></a>
  And I meet the error as following: 
  <a href="https://i.stack.imgur.com/5wjKA.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5wjKA.jpg" alt="enter image description here"></a>
  The system I used is Centos 7 and the JDK I used is 1.7.0_07. Anyone can help me to solve the problem?</p>