| /** |
| * 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.falcon.logging.v1; |
| |
| import org.apache.commons.httpclient.HttpClient; |
| import org.apache.commons.httpclient.HttpStatus; |
| import org.apache.commons.httpclient.methods.GetMethod; |
| import org.apache.falcon.logging.DefaultTaskLogRetriever; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.DefaultJobHistoryParser; |
| import org.apache.hadoop.mapred.JobHistory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| /** |
| * Hadoop v1 task log retriever based on job history |
| */ |
| public final class TaskLogRetrieverV1 extends DefaultTaskLogRetriever { |
| private static final Logger LOG = LoggerFactory.getLogger(TaskLogRetrieverV1.class); |
| |
| @Override |
| public String getFromHistory(String jobId) throws IOException { |
| Configuration conf = getConf(); |
| String file = getHistoryFile(conf, jobId); |
| if (file == null) return null; |
| JobHistory.JobInfo jobInfo = new JobHistory.JobInfo(jobId); |
| DefaultJobHistoryParser.parseJobTasks(file, jobInfo, new Path(file).getFileSystem(conf)); |
| LOG.info("History file: {}", file); |
| LOG.debug("Number of tasks in the history file: {}", jobInfo.getAllTasks().size()); |
| for (JobHistory.Task task : jobInfo.getAllTasks().values()) { |
| if (task.get(JobHistory.Keys.TASK_TYPE).equals(JobHistory.Values.MAP.name()) && |
| task.get(JobHistory.Keys.TASK_STATUS).equals(JobHistory.Values.SUCCESS.name())) { |
| for (JobHistory.TaskAttempt attempt : task.getTaskAttempts().values()) { |
| if (attempt.get(JobHistory.Keys.TASK_STATUS).equals(JobHistory.Values.SUCCESS.name())) { |
| return JobHistory.getTaskLogsUrl(attempt); |
| } |
| } |
| } |
| } |
| LOG.warn("Unable to find successful map task attempt"); |
| return null; |
| } |
| |
| private String getHistoryFile(Configuration conf, String jobId) throws IOException { |
| String jtAddress = "scheme://" + conf.get("mapred.job.tracker"); |
| String jtHttpAddr = "scheme://" + conf.get("mapred.job.tracker.http.address"); |
| try { |
| String host = new URI(jtAddress).getHost(); |
| int port = new URI(jtHttpAddr).getPort(); |
| HttpClient client = new HttpClient(); |
| String jobUrl = "http://" + host + ":" + port + "/jobdetails.jsp"; |
| GetMethod get = new GetMethod(jobUrl); |
| get.setQueryString("jobid=" + jobId); |
| get.setFollowRedirects(false); |
| int status = client.executeMethod(get); |
| String file = null; |
| if (status == HttpStatus.SC_MOVED_PERMANENTLY || status == HttpStatus.SC_MOVED_TEMPORARILY) { |
| file = get.getResponseHeader("Location").toString(); |
| file = file.substring(file.lastIndexOf('=') + 1); |
| file = JobHistory.JobInfo.decodeJobHistoryFileName(file); |
| } else { |
| LOG.warn("JobURL {} for id: {} returned {}", jobUrl, jobId, status); |
| } |
| return file; |
| } catch (URISyntaxException e) { |
| throw new IOException("JT Address: " + jtAddress + ", http Address: " + jtHttpAddr, e); |
| } |
| } |
| } |