# Package org.apache.nutch.metrics

package org.apache.nutch.metrics
Metrics infrastructure for Apache Nutch.

This package provides centralized constants and utilities for Hadoop MapReduce metrics/counters following Prometheus naming conventions.

The main class is `NutchMetrics` which defines all counter group names and counter names as constants.

Since:
  1.22

- Class
  Description
  ErrorTracker
  A utility class for tracking errors by category with automatic classification.
  ErrorTracker.ErrorType
  Error type categories for classification.
  LatencyTracker
  A utility class for tracking latency metrics using TDigest for percentile calculation.
  NutchMetrics
  Centralized constants for Hadoop metrics counter groups and names.