private HadoopShims.HdfsErasureCodingShim getHdfsErasureCodingShim() {
    HadoopShims.HdfsErasureCodingShim erasureShim = null;
    try {
      erasureShim = ErasureProcessor.getErasureShim(jobConf);
    } catch (IOException e) {
      // this should not happen
      LOG.warn("Could not get Erasure Coding shim for reason: " + e.getMessage());
      // fall through
    }
    return erasureShim;
  }
Get the Erasure Coding Shim.
@return a HdfsErasureCodingShim
ql/src/java/org/apache/hadoop/hive/ql/MapRedStats.java