Examples of org.apache.hadoop.metrics2.MetricsException

org.apache.hadoop.metrics2.MetricsException
A general metrics exception wrapper

    MetricsTag tag = Interns.tag(info, value);


    if (!override) {
      MetricsTag existing = tagsMap.putIfAbsent(info.name(), tag);
      if (existing != null) {
        throw new MetricsException("Tag "+ info.name() +" already exists!");
      }
      return this;
    }


    tagsMap.put(info.name(), tag);

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        return newGauge;
      }
    }


    if (!(metric instanceof MutableGaugeLong)) {
      throw new MetricsException("Metric already exists in registry for metric name: " + gaugeName +
              " and not of type MetricMutableGaugeLong");
    }


    return (MutableGaugeLong) metric;
  }

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      }
    }




    if (!(counter instanceof MutableCounterLong)) {
      throw new MetricsException("Metric already exists in registry for metric name: " +
              counterName + " and not of type MetricMutableCounterLong");
    }


    return (MutableCounterLong) counter;
  }

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      }
    }




    if (!(histo instanceof MutableHistogram)) {
      throw new MetricsException("Metric already exists in registry for metric name: " +
          histoName + " and not of type MutableHistogram");
    }


    return (MutableHistogram) histo;
  }

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      }
    }




    if (!(histo instanceof MetricMutableQuantiles)) {
      throw new MetricsException("Metric already exists in registry for metric name: " +
          histoName + " and not of type MutableHistogram");
    }


    return (MetricMutableQuantiles) histo;
  }

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  @SuppressWarnings("unchecked")
  private<T> T returnExistingWithCast(MutableMetric metric,
                                      Class<T> metricClass, String name) {
    if (!metricClass.isAssignableFrom(metric.getClass())) {
      throw new MetricsException("Metric already exists in registry for metric name: " +
              name + " and not of type " + metricClass +
              " but instead of type " + metric.getClass());
    }


    return (T) metric;

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      writer = filename == null
          ? new PrintWriter(System.out)
          : new PrintWriter(new FileWriter(new File(filename), true));
    }
    catch (Exception e) {
      throw new MetricsException("Error creating "+ filename, e);
    }
  }

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      boolean extended, boolean returnExisting) {
    if (returnExisting) {
      MutableMetric rate = metricsMap.get(name);
      if (rate != null) {
        if (rate instanceof MutableRate) return (MutableRate) rate;
        throw new MetricsException("Unexpected metrics type "+ rate.getClass()
                                   +" for "+ name);
      }
    }
    MutableRate ret = new MutableRate(name, desc, extended);
    return addNewMetricIfAbsent(name, ret, MutableRate.class);

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    if (m != null) {
      if (m instanceof MutableStat) {
        ((MutableStat) m).add(value);
      }
      else {
        throw new MetricsException("Unsupported add(value) for metric "+ name);
      }
    }
    else {
      metricsMap.put(name, newRate(name)); // default is a rate metric
      add(name, value);

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    MetricsTag tag = Interns.tag(info, value);


    if (!override) {
      MetricsTag existing = tagsMap.putIfAbsent(info.name(), tag);
      if (existing != null) {
        throw new MetricsException("Tag "+ info.name() +" already exists!");
      }
      return this;
    }


    tagsMap.put(info.name(), tag);

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