dagUgi.doAs(new PrivilegedExceptionAction<Void>() {
@Override
public Void run() throws Exception {
OutputCommitter outputCommitter = RuntimeUtils.createClazzInstance(
od.getInitializerClassName());
OutputCommitterContext outputCommitterContext =
new OutputCommitterContextImpl(appContext.getApplicationID(),
appContext.getApplicationAttemptId().getAttemptId(),
appContext.getCurrentDAG().getName(),
vertexName,
outputName,