1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 package org.apache.giraph.job; 20 21 import org.apache.hadoop.mapreduce.Job; 22 23 import java.io.IOException; 24 25 26 /** 27 * Class to decide whether a GiraphJob should be restarted after failure. 28 */ 29 public interface GiraphJobRetryChecker { 30 /** 31 * Check if the job should be retried 32 * 33 * @param submittedJob Job that ran and failed 34 * @param tryCount How many times have we tried to run the job until now 35 * 36 * @return True iff job should be retried 37 */ 38 boolean shouldRetry(Job submittedJob, int tryCount); 39 40 /** 41 * The job has been checkpointed and halted. Should we now restart it? 42 * @param lastAttempt latest failed job 43 * @return JobID of job to be restarted or null if 44 * we don't want to restart anything 45 */ 46 String shouldRestartCheckpoint(Job lastAttempt) throws IOException; 47 }