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; 023import org.apache.hadoop.yarn.api.ApplicationMasterProtocol; 024import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse; 025import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest; 026import org.apache.hadoop.yarn.exceptions.ApplicationAttemptNotFoundException; 027import org.apache.hadoop.yarn.exceptions.ApplicationMasterNotRegisteredException; 028 029/** 030 * Command sent by the Resource Manager to the Application Master in the 031 * AllocateResponse 032 * @see AllocateResponse 033 */ 034@Public 035@Unstable 036public enum AMCommand { 037 038 /** 039 * @deprecated Sent by Resource Manager when it is out of sync with the AM and 040 * wants the AM get back in sync. 041 * 042 * Note: Instead of sending this command, 043 * {@link ApplicationMasterNotRegisteredException} will be thrown 044 * when ApplicationMaster is out of sync with ResourceManager and 045 * ApplicationMaster is expected to re-register with RM by calling 046 * {@link ApplicationMasterProtocol#registerApplicationMaster(RegisterApplicationMasterRequest)} 047 */ 048 AM_RESYNC, 049 050 /** 051 * @deprecated Sent by Resource Manager when it wants the AM to shutdown. 052 * Note: This command was earlier sent by ResourceManager to 053 * instruct AM to shutdown if RM had restarted. Now 054 * {@link ApplicationAttemptNotFoundException} will be thrown in case 055 * that RM has restarted and AM is supposed to handle this 056 * exception by shutting down itself. 057 */ 058 AM_SHUTDOWN 059}