title: Why YARN java heap space memory error?
body: <p>I want to try about setting memory in YARN, so I'll try to configure some parameter on yarn-site.xml and mapred-site.xml. By the way I use hadoop 2.6.0. But, I get an error when I do a mapreduce job. It says like this :</p>
  
  <pre><code>15/03/12 10:57:23 INFO mapreduce.Job: Task Id :
  attempt_1426132548565_0001_m_000002_0, Status : FAILED
  Error: Java heap space
  Container killed by the ApplicationMaster.
  Container killed on request. Exit code is 143
  Container exited with a non-zero exit code 143
  </code></pre>
  
  <p>I think that I have configured it right, I give map.java.opts and reduce.java.opts the small size = 64 MB. I've try to configure some parameter then, like change the map.java.opts and reduce.java.opts on mapred-site.xml, and I still get this error. I think that I do not really understand how YARN memory works. BY the way for this I try on single node computer.</p>