Cannot see MR logs in Hadoop 2.x

[Kyle Lin]

Hey guys

    My Environment: HDP 2 (Hadoop 2.2.0).

    When using Hadoop 1.x, I write log imformation in my MapReduce code,
then see the log message in TaskTracker log. But In YARN, I cannot find the
log message in any log files(historyserver, nodemanager, resourcemanager),
even using System.out.println.

    I also try to see app log through the address of
yarn.resourcemanager.webapp.address. Still cannot see my log messages.


Kyle