001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.yarn.api.records; 020 021import org.apache.hadoop.classification.InterfaceAudience.Public; 022import org.apache.hadoop.classification.InterfaceStability.Unstable; 023 024/** 025 * <p>State of a <code>Node</code>.</p> 026 */ 027@Public 028@Unstable 029public enum NodeState { 030 /** New node */ 031 NEW, 032 033 /** Running node */ 034 RUNNING, 035 036 /** Node is unhealthy */ 037 UNHEALTHY, 038 039 /** Node is out of service */ 040 DECOMMISSIONED, 041 042 /** Node has not sent a heartbeat for some configured time threshold*/ 043 LOST, 044 045 /** Node has rebooted */ 046 REBOOTED; 047 048 public boolean isUnusable() { 049 return (this == UNHEALTHY || this == DECOMMISSIONED || this == LOST); 050 } 051}