public double getMaxLogSizeInMB() {
    return _maxLogSizeInMB;
  }
This class implements the Fetcher for MapReduce Applications on Hadoop2
Instead of fetching data from job history server, it retrieves history logs and job configs from
HDFS directly. Each job's data consists of a JSON event log file with extension ".jhist" and an
XML job configuration file.
app/com/linkedin/drelephant/mapreduce/fetchers/MapReduceFSFetcherHadoop2.java