@Override
  public boolean equals(Object aThat) {
    if (this == aThat) {
      return true;
    }
    if (!(aThat instanceof MetricQuantile)) {
      return false;
    }

    MetricQuantile that = (MetricQuantile) aThat;

    long qbits = Double.doubleToLongBits(quantile);
    long ebits = Double.doubleToLongBits(error);

    return qbits == Double.doubleToLongBits(that.quantile)
      && ebits == Double.doubleToLongBits(that.error);
  }
The error bounds for the {@link #quantile}.
hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricQuantile.java