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
019 package org.apache.hadoop.yarn.api.records;
020
021 import org.apache.hadoop.classification.InterfaceAudience.Public;
022 import org.apache.hadoop.classification.InterfaceStability.Unstable;
023
024 /**
025 * <p>State of a <code>Node</code>.</p>
026 */
027 @Public
028 @Unstable
029 public 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 }