TestNNBench#testNNBenchCreateReadAndDelete failing in our internal build

// Some comments here
  public void map(Text key, 
            LongWritable value,
            OutputCollector<Text, Text> output,
            Reporter reporter) throws IOException {
      if (barrier()) {
        String fileName = "file_" + value;
        if (op.equals(OP_CREATE_WRITE)) {
          startTimeTPmS = System.currentTimeMillis();
          doCreateWriteOp(fileName, reporter);
        } ...
      } else {
        output.collect(new Text("l:latemaps"), new Text("1"));
      }
  // Below are the relevant parts of barrier() method
  private boolean barrier() {
    ..
    // If the sleep time is greater than 0, then sleep and return
    ...
    LOG.info("Waiting in barrier for: " + sleepTime + " ms");
    return retVal;
  }
  // Below are the relevant parts of the doCreateWriteOp
  private void doCreateWriteOp(String name,
                                 Reporter reporter) {
    FSDataOutputStream out;
    byte[] buffer = new byte[bytesToWrite];  
    for (long l = 0l; l < numberOfFiles; l++) {
      Path filePath = new Path(new Path(baseDir, dataDirName), 
              name + "_" + l);
    }
  ....
  }