if (tezCounters != null) {
counters = covertToHadoopCounters(tezCounters);
}
CounterGroup dagGrp = tezCounters.getGroup(DAG_COUNTER_GROUP);
totalTasks = (int) dagGrp.findCounter("TOTAL_LAUNCHED_TASKS").getValue();
CounterGroup fsGrp = tezCounters.getGroup(FS_COUNTER_GROUP);
fileBytesRead = fsGrp.findCounter("FILE_BYTES_READ").getValue();
fileBytesWritten = fsGrp.findCounter("FILE_BYTES_WRITTEN").getValue();
hdfsBytesRead = fsGrp.findCounter("HDFS_BYTES_READ").getValue();