| /* |
| * 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.pig.backend.hadoop.executionengine.shims; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Method; |
| import java.util.Iterator; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.Counters; |
| import org.apache.hadoop.mapred.DowngradeHelper; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.TIPStatus; |
| import org.apache.hadoop.mapred.TaskReport; |
| import org.apache.hadoop.mapred.jobcontrol.Job; |
| import org.apache.hadoop.mapred.jobcontrol.JobControl; |
| import org.apache.hadoop.mapreduce.Cluster; |
| import org.apache.hadoop.mapreduce.ContextFactory; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.JobID; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.hadoop.mapreduce.TaskAttemptID; |
| import org.apache.hadoop.mapreduce.TaskType; |
| import org.apache.hadoop.mapreduce.task.JobContextImpl; |
| import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl; |
| import org.apache.pig.PigConfiguration; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRConfiguration; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POStore; |
| import org.apache.pig.backend.hadoop23.PigJobControl; |
| |
| public class HadoopShims { |
| |
| private static Log LOG = LogFactory.getLog(HadoopShims.class); |
| private static Method getFileSystemClass; |
| |
| static public JobContext cloneJobContext(JobContext original) throws IOException, InterruptedException { |
| JobContext newContext = ContextFactory.cloneContext(original, |
| new JobConf(original.getConfiguration())); |
| return newContext; |
| } |
| |
| static public TaskAttemptContext createTaskAttemptContext(Configuration conf, |
| TaskAttemptID taskId) { |
| if (conf instanceof JobConf) { |
| return new TaskAttemptContextImpl(new JobConf(conf), taskId); |
| } else { |
| return new TaskAttemptContextImpl(conf, taskId); |
| } |
| } |
| |
| static public JobContext createJobContext(Configuration conf, |
| JobID jobId) { |
| if (conf instanceof JobConf) { |
| return new JobContextImpl(new JobConf(conf), jobId); |
| } else { |
| return new JobContextImpl(conf, jobId); |
| } |
| } |
| |
| static public boolean isMap(TaskAttemptID taskAttemptID) { |
| TaskType type = taskAttemptID.getTaskType(); |
| if (type==TaskType.MAP) |
| return true; |
| |
| return false; |
| } |
| |
| static public TaskAttemptID getNewTaskAttemptID() { |
| TaskAttemptID taskAttemptID = new TaskAttemptID("", 1, TaskType.MAP, |
| 1, 1); |
| return taskAttemptID; |
| } |
| |
| static public TaskAttemptID createTaskAttemptID(String jtIdentifier, int jobId, boolean isMap, |
| int taskId, int id) { |
| if (isMap) { |
| return new TaskAttemptID(jtIdentifier, jobId, TaskType.MAP, taskId, id); |
| } else { |
| return new TaskAttemptID(jtIdentifier, jobId, TaskType.REDUCE, taskId, id); |
| } |
| } |
| |
| static public void storeSchemaForLocal(Job job, POStore st) { |
| // Doing nothing for hadoop 23 |
| } |
| |
| static public String getFsCounterGroupName() { |
| return "org.apache.hadoop.mapreduce.FileSystemCounter"; |
| } |
| |
| static public void commitOrCleanup(OutputCommitter oc, JobContext jc) throws IOException { |
| oc.commitJob(jc); |
| } |
| |
| public static JobControl newJobControl(String groupName, int timeToSleep) { |
| return new PigJobControl(groupName, timeToSleep); |
| } |
| |
| public static long getDefaultBlockSize(FileSystem fs, Path path) { |
| return fs.getDefaultBlockSize(path); |
| } |
| |
| public static Counters getCounters(Job job) throws IOException { |
| try { |
| Cluster cluster = new Cluster(job.getJobConf()); |
| org.apache.hadoop.mapreduce.Job mrJob = cluster.getJob(job.getAssignedJobID()); |
| if (mrJob == null) { // In local mode, mrJob will be null |
| mrJob = job.getJob(); |
| } |
| return new Counters(mrJob.getCounters()); |
| } catch (Exception ir) { |
| throw new IOException(ir); |
| } |
| } |
| |
| public static boolean isJobFailed(TaskReport report) { |
| return report.getCurrentStatus()==TIPStatus.FAILED; |
| } |
| |
| public static void unsetConf(Configuration conf, String key) { |
| conf.unset(key); |
| } |
| |
| /** |
| * Fetch mode needs to explicitly set the task id which is otherwise done by Hadoop |
| * @param conf |
| * @param taskAttemptID |
| */ |
| public static void setTaskAttemptId(Configuration conf, TaskAttemptID taskAttemptID) { |
| conf.setInt(MRConfiguration.JOB_APPLICATION_ATTEMPT_ID, taskAttemptID.getId()); |
| } |
| |
| /** |
| * Returns whether the give path has a FileSystem implementation. |
| * |
| * @param path path |
| * @param conf configuration |
| * @return true if the give path's scheme has a FileSystem implementation, |
| * false otherwise |
| */ |
| public static boolean hasFileSystemImpl(Path path, Configuration conf) { |
| String scheme = path.toUri().getScheme(); |
| if (scheme != null) { |
| // Hadoop 0.23 |
| if (conf.get("fs.file.impl") != null) { |
| String fsImpl = conf.get("fs." + scheme + ".impl"); |
| if (fsImpl == null) { |
| return false; |
| } |
| } else { |
| // Hadoop 2.x HADOOP-7549 |
| if (getFileSystemClass == null) { |
| try { |
| getFileSystemClass = FileSystem.class.getDeclaredMethod( |
| "getFileSystemClass", String.class, Configuration.class); |
| } catch (NoSuchMethodException e) { |
| LOG.warn("Error while trying to determine if path " + path + |
| " has a filesystem implementation"); |
| // Assume has implementation to be safe |
| return true; |
| } |
| } |
| try { |
| Object fs = getFileSystemClass.invoke(null, scheme, conf); |
| return fs == null ? false : true; |
| } catch (Exception e) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Returns the progress of a Job j which is part of a submitted JobControl |
| * object. The progress is for this Job. So it has to be scaled down by the |
| * num of jobs that are present in the JobControl. |
| * |
| * @param j The Job for which progress is required |
| * @return Returns the percentage progress of this Job |
| * @throws IOException |
| */ |
| public static double progressOfRunningJob(Job j) |
| throws IOException { |
| org.apache.hadoop.mapreduce.Job mrJob = j.getJob(); |
| try { |
| return (mrJob.mapProgress() + mrJob.reduceProgress()) / 2; |
| } catch (Exception ir) { |
| return 0; |
| } |
| } |
| |
| public static void killJob(Job job) throws IOException { |
| org.apache.hadoop.mapreduce.Job mrJob = job.getJob(); |
| try { |
| if (mrJob != null) { |
| mrJob.killJob(); |
| } |
| } catch (Exception ir) { |
| throw new IOException(ir); |
| } |
| } |
| |
| public static Iterator<TaskReport> getTaskReports(Job job, TaskType type) throws IOException { |
| if (job.getJobConf().getBoolean(PigConfiguration.PIG_NO_TASK_REPORT, false)) { |
| LOG.info("TaskReports are disabled for job: " + job.getAssignedJobID()); |
| return null; |
| } |
| Cluster cluster = new Cluster(job.getJobConf()); |
| try { |
| org.apache.hadoop.mapreduce.Job mrJob = cluster.getJob(job.getAssignedJobID()); |
| if (mrJob == null) { // In local mode, mrJob will be null |
| mrJob = job.getJob(); |
| } |
| org.apache.hadoop.mapreduce.TaskReport[] reports = mrJob.getTaskReports(type); |
| return DowngradeHelper.downgradeTaskReports(reports); |
| } catch (InterruptedException ir) { |
| throw new IOException(ir); |
| } |
| } |
| |
| public static boolean isHadoopYARN() { |
| return true; |
| } |
| } |
