Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.hadoop.mapreduce; import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceStability; // Counters used by Task classes @InterfaceAudience.Public @InterfaceStability.Evolving public enum TaskCounter { MAP_INPUT_RECORDS, MAP_OUTPUT_RECORDS, MAP_SKIPPED_RECORDS, MAP_OUTPUT_BYTES, MAP_OUTPUT_MATERIALIZED_BYTES, SPLIT_RAW_BYTES, COMBINE_INPUT_RECORDS, COMBINE_OUTPUT_RECORDS, REDUCE_INPUT_GROUPS, REDUCE_SHUFFLE_BYTES, REDUCE_INPUT_RECORDS, REDUCE_OUTPUT_RECORDS, REDUCE_SKIPPED_GROUPS, REDUCE_SKIPPED_RECORDS, SPILLED_RECORDS, SHUFFLED_MAPS, FAILED_SHUFFLE, MERGED_MAP_OUTPUTS, GC_TIME_MILLIS, CPU_MILLISECONDS, PHYSICAL_MEMORY_BYTES, VIRTUAL_MEMORY_BYTES, COMMITTED_HEAP_BYTES, MAP_PHYSICAL_MEMORY_BYTES_MAX, MAP_VIRTUAL_MEMORY_BYTES_MAX, REDUCE_PHYSICAL_MEMORY_BYTES_MAX, REDUCE_VIRTUAL_MEMORY_BYTES_MAX; }