MRInputUserPayloadProto userPayloadProto = MRInputHelpers
.parseMRInputPayload(getContext().getInputUserPayload());
if (LOG.isDebugEnabled()) {
sw.stop();
LOG.debug("Time to parse MRInput payload into prot: "
+ sw.elapsedMillis());
}
Configuration conf = TezUtils.createConfFromByteString(userPayloadProto
.getConfigurationBytes());
JobConf jobConf = new JobConf(conf);
boolean useNewApi = jobConf.getUseNewMapper();