What does AM in "AM Container" mean in Hadoop

Question

In Hadoop, what does AM in "AM Container" mean?

There are many posts about the MapReduce error, "failed 2 times due to AM Container" ... "Exception from container-launch: org.apache.hadoop.util.Shell$ExitCodeException" ... but none solve my problem (with my HBase job).

I'm a beginner and I'd like to start by knowing what AM stands for. I can't find anything on the web.

Answer 1

Here's another link from Hadoop which may help understanding the Application Master (as @nigge noted above).

http://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html