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MapReduceExecutable.java
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MapReduceExecutable.java
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/*
* 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.kylin.job.common;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Constructor;
import java.util.Collections;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Cluster;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.mapreduce.JobStatus;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.yarn.conf.HAUtil;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.util.RMHAUtils;
import org.apache.kylin.common.KylinConfig;
import org.apache.kylin.common.util.ClassUtil;
import org.apache.kylin.common.util.HadoopUtil;
import org.apache.kylin.job.constant.ExecutableConstants;
import org.apache.kylin.job.constant.JobStepStatusEnum;
import org.apache.kylin.job.exception.ExecuteException;
import org.apache.kylin.job.execution.AbstractExecutable;
import org.apache.kylin.job.execution.ExecutableContext;
import org.apache.kylin.job.execution.ExecutableState;
import org.apache.kylin.job.execution.ExecuteResult;
import org.apache.kylin.job.execution.Output;
import org.apache.kylin.job.hadoop.AbstractHadoopJob;
import org.apache.kylin.job.tools.HadoopStatusChecker;
import com.google.common.base.Preconditions;
/**
* Created by qianzhou on 12/25/14.
*/
public class MapReduceExecutable extends AbstractExecutable {
private static final String KEY_MR_JOB = "MR_JOB_CLASS";
private static final String KEY_PARAMS = "MR_JOB_PARAMS";
public static final String MAP_REDUCE_WAIT_TIME = "mapReduceWaitTime";
public MapReduceExecutable() {
super();
}
@Override
protected void onExecuteStart(ExecutableContext executableContext) {
final Output output = executableManager.getOutput(getId());
if (output.getExtra().containsKey(START_TIME)) {
final String mrJobId = output.getExtra().get(ExecutableConstants.MR_JOB_ID);
if (mrJobId == null) {
executableManager.updateJobOutput(getId(), ExecutableState.RUNNING, null, null);
return;
}
try {
Configuration conf = HadoopUtil.getCurrentConfiguration();
Job job = new Cluster(conf).getJob(JobID.forName(mrJobId));
if (job.getJobState() == JobStatus.State.FAILED) {
//remove previous mr job info
super.onExecuteStart(executableContext);
} else {
executableManager.updateJobOutput(getId(), ExecutableState.RUNNING, null, null);
}
} catch (IOException e) {
logger.warn("error get hadoop status");
super.onExecuteStart(executableContext);
} catch (InterruptedException e) {
logger.warn("error get hadoop status");
super.onExecuteStart(executableContext);
}
} else {
super.onExecuteStart(executableContext);
}
}
@Override
protected ExecuteResult doWork(ExecutableContext context) throws ExecuteException {
final String mapReduceJobClass = getMapReduceJobClass();
String params = getMapReduceParams();
Preconditions.checkNotNull(mapReduceJobClass);
Preconditions.checkNotNull(params);
try {
Job job;
final Map<String, String> extra = executableManager.getOutput(getId()).getExtra();
if (extra.containsKey(ExecutableConstants.MR_JOB_ID)) {
Configuration conf = HadoopUtil.getCurrentConfiguration();
job = new Cluster(conf).getJob(JobID.forName(extra.get(ExecutableConstants.MR_JOB_ID)));
logger.info("mr_job_id:" + extra.get(ExecutableConstants.MR_JOB_ID + " resumed"));
} else {
final Constructor<? extends AbstractHadoopJob> constructor = ClassUtil.forName(mapReduceJobClass, AbstractHadoopJob.class).getConstructor();
final AbstractHadoopJob hadoopJob = constructor.newInstance();
hadoopJob.setConf(HadoopUtil.getCurrentConfiguration());
hadoopJob.setAsync(true); // so the ToolRunner.run() returns right away
logger.info("parameters of the MapReduceExecutable:");
logger.info(params);
String[] args = params.trim().split("\\s+");
try {
//for async mr job, ToolRunner just return 0;
ToolRunner.run(hadoopJob, args);
} catch (Exception ex) {
StringBuilder log = new StringBuilder();
logger.error("error execute " + this.toString(), ex);
StringWriter stringWriter = new StringWriter();
ex.printStackTrace(new PrintWriter(stringWriter));
log.append(stringWriter.toString()).append("\n");
log.append("result code:").append(2);
return new ExecuteResult(ExecuteResult.State.ERROR, log.toString());
}
job = hadoopJob.getJob();
}
final StringBuilder output = new StringBuilder();
final HadoopCmdOutput hadoopCmdOutput = new HadoopCmdOutput(job, output);
final String restStatusCheckUrl = getRestStatusCheckUrl(job, context.getConfig());
if (restStatusCheckUrl == null) {
logger.error("restStatusCheckUrl is null");
return new ExecuteResult(ExecuteResult.State.ERROR, "restStatusCheckUrl is null");
}
String mrJobId = hadoopCmdOutput.getMrJobId();
HadoopStatusChecker statusChecker = new HadoopStatusChecker(restStatusCheckUrl, mrJobId, output);
JobStepStatusEnum status = JobStepStatusEnum.NEW;
while (!isDiscarded()) {
JobStepStatusEnum newStatus = statusChecker.checkStatus();
if (status == JobStepStatusEnum.KILLED) {
executableManager.updateJobOutput(getId(), ExecutableState.ERROR, Collections.<String, String>emptyMap(), "killed by admin");
return new ExecuteResult(ExecuteResult.State.FAILED, "killed by admin");
}
if (status == JobStepStatusEnum.WAITING && (newStatus == JobStepStatusEnum.FINISHED || newStatus == JobStepStatusEnum.ERROR || newStatus == JobStepStatusEnum.RUNNING)) {
final long waitTime = System.currentTimeMillis() - getStartTime();
setMapReduceWaitTime(waitTime);
}
status = newStatus;
executableManager.addJobInfo(getId(), hadoopCmdOutput.getInfo());
if (status.isComplete()) {
hadoopCmdOutput.updateJobCounter();
final Map<String, String> info = hadoopCmdOutput.getInfo();
info.put(ExecutableConstants.SOURCE_RECORDS_COUNT, hadoopCmdOutput.getMapInputRecords());
info.put(ExecutableConstants.SOURCE_RECORDS_SIZE, hadoopCmdOutput.getHdfsBytesRead());
info.put(ExecutableConstants.HDFS_BYTES_WRITTEN, hadoopCmdOutput.getHdfsBytesWritten());
executableManager.addJobInfo(getId(), info);
if (status == JobStepStatusEnum.FINISHED) {
return new ExecuteResult(ExecuteResult.State.SUCCEED, output.toString());
} else {
return new ExecuteResult(ExecuteResult.State.FAILED, output.toString());
}
}
Thread.sleep(context.getConfig().getYarnStatusCheckIntervalSeconds() * 1000);
}
//TODO kill discarded mr job using "hadoop job -kill " + mrJobId
return new ExecuteResult(ExecuteResult.State.DISCARDED, output.toString());
} catch (ReflectiveOperationException e) {
logger.error("error getMapReduceJobClass, class name:" + getParam(KEY_MR_JOB), e);
return new ExecuteResult(ExecuteResult.State.ERROR, e.getLocalizedMessage());
} catch (Exception e) {
logger.error("error execute " + this.toString(), e);
return new ExecuteResult(ExecuteResult.State.ERROR, e.getLocalizedMessage());
}
}
private String getRestStatusCheckUrl(Job job, KylinConfig config) {
final String yarnStatusCheckUrl = config.getYarnStatusCheckUrl();
if (yarnStatusCheckUrl != null) {
return yarnStatusCheckUrl;
} else {
logger.info(KylinConfig.KYLIN_JOB_YARN_APP_REST_CHECK_URL + " is not set, read from job configuration");
}
String rmWebHost = HAUtil.getConfValueForRMInstance(YarnConfiguration.RM_WEBAPP_ADDRESS, YarnConfiguration.DEFAULT_RM_WEBAPP_ADDRESS, job.getConfiguration());
if(HAUtil.isHAEnabled(job.getConfiguration())) {
YarnConfiguration conf = new YarnConfiguration(job.getConfiguration());
String active = RMHAUtils.findActiveRMHAId(conf);
rmWebHost = HAUtil.getConfValueForRMInstance(HAUtil.addSuffix(YarnConfiguration.RM_WEBAPP_ADDRESS, active), YarnConfiguration.DEFAULT_RM_WEBAPP_ADDRESS, conf);
}
if (StringUtils.isEmpty(rmWebHost)) {
return null;
}
if (rmWebHost.startsWith("http://") || rmWebHost.startsWith("https://")) {
//do nothing
} else {
rmWebHost = "http://" + rmWebHost;
}
logger.info("yarn.resourcemanager.webapp.address:" + rmWebHost);
return rmWebHost + "/ws/v1/cluster/apps/${job_id}?anonymous=true";
}
public long getMapReduceWaitTime() {
return getExtraInfoAsLong(MAP_REDUCE_WAIT_TIME, 0L);
}
public void setMapReduceWaitTime(long t) {
addExtraInfo(MAP_REDUCE_WAIT_TIME, t + "");
}
public void setMapReduceJobClass(Class<? extends AbstractHadoopJob> clazzName) {
setParam(KEY_MR_JOB, clazzName.getName());
}
public String getMapReduceJobClass() throws ExecuteException {
return getParam(KEY_MR_JOB);
}
public void setMapReduceParams(String param) {
setParam(KEY_PARAMS, param);
}
public String getMapReduceParams() {
return getParam(KEY_PARAMS);
}
}