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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.hadoop.hive.ql.exec.spark;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.Context;
import org.apache.hadoop.hive.ql.DriverContext;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.exec.spark.status.SparkJobRef;
import org.apache.hadoop.hive.ql.exec.spark.status.impl.JobMetricsListener;
import org.apache.hadoop.hive.ql.exec.spark.status.impl.LocalSparkJobRef;
import org.apache.hadoop.hive.ql.exec.spark.status.impl.LocalSparkJobStatus;
import org.apache.hadoop.hive.ql.io.HiveKey;
import org.apache.hadoop.hive.ql.plan.BaseWork;
import org.apache.hadoop.hive.ql.plan.SparkWork;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hive.spark.counter.SparkCounters;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaFutureAction;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.spark.api.java.JavaSparkContext;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
/**
* LocalSparkClient submit Spark job in local driver, it's responsible for build spark client
* environment and execute spark work.
*/
public class LocalHiveSparkClient implements HiveSparkClient {
private static final long serialVersionUID = 1L;
private static final String MR_JAR_PROPERTY = "tmpjars";
protected static final transient Log LOG = LogFactory
.getLog(LocalHiveSparkClient.class);
private static final Splitter CSV_SPLITTER = Splitter.on(",").omitEmptyStrings();
private static LocalHiveSparkClient client;
public static synchronized LocalHiveSparkClient getInstance(SparkConf sparkConf) {
if (client == null) {
client = new LocalHiveSparkClient(sparkConf);
}
return client;
}
private JavaSparkContext sc;
private List localJars = new ArrayList();
private List localFiles = new ArrayList();
private JobMetricsListener jobMetricsListener;
private LocalHiveSparkClient(SparkConf sparkConf) {
sc = new JavaSparkContext(sparkConf);
jobMetricsListener = new JobMetricsListener();
sc.sc().listenerBus().addListener(jobMetricsListener);
}
@Override
public SparkConf getSparkConf() {
return sc.sc().conf();
}
@Override
public int getExecutorCount() {
return sc.sc().getExecutorMemoryStatus().size();
}
@Override
public int getDefaultParallelism() throws Exception {
return sc.sc().defaultParallelism();
}
@Override
public SparkJobRef execute(DriverContext driverContext, SparkWork sparkWork) throws Exception {
Context ctx = driverContext.getCtx();
HiveConf hiveConf = (HiveConf) ctx.getConf();
refreshLocalResources(sparkWork, hiveConf);
JobConf jobConf = new JobConf(hiveConf);
// Create temporary scratch dir
Path emptyScratchDir;
emptyScratchDir = ctx.getMRTmpPath();
FileSystem fs = emptyScratchDir.getFileSystem(jobConf);
fs.mkdirs(emptyScratchDir);
SparkCounters sparkCounters = new SparkCounters(sc);
Map> prefixes = sparkWork.getRequiredCounterPrefix();
if (prefixes != null) {
for (String group : prefixes.keySet()) {
for (String counterName : prefixes.get(group)) {
sparkCounters.createCounter(group, counterName);
}
}
}
SparkReporter sparkReporter = new SparkReporter(sparkCounters);
// Generate Spark plan
SparkPlanGenerator gen =
new SparkPlanGenerator(sc, ctx, jobConf, emptyScratchDir, sparkReporter);
SparkPlan plan = gen.generate(sparkWork);
// Execute generated plan.
JavaPairRDD finalRDD = plan.generateGraph();
// We use Spark RDD async action to submit job as it's the only way to get jobId now.
JavaFutureAction future = finalRDD.foreachAsync(HiveVoidFunction.getInstance());
// As we always use foreach action to submit RDD graph, it would only trigger one job.
int jobId = future.jobIds().get(0);
LocalSparkJobStatus sparkJobStatus = new LocalSparkJobStatus(
sc, jobId, jobMetricsListener, sparkCounters, plan.getCachedRDDIds(), future);
return new LocalSparkJobRef(Integer.toString(jobId), hiveConf, sparkJobStatus, sc);
}
/**
* At this point single SparkContext is used by more than one thread, so make this
* method synchronized.
*
* This method can't remove a jar/resource from SparkContext. Looks like this is an
* issue we have to live with until multiple SparkContexts are supported in a single JVM.
*/
private synchronized void refreshLocalResources(SparkWork sparkWork, HiveConf conf) {
// add hive-exec jar
addJars((new JobConf(this.getClass())).getJar());
// add aux jars
addJars(HiveConf.getVar(conf, HiveConf.ConfVars.HIVEAUXJARS));
// add added jars
String addedJars = Utilities.getResourceFiles(conf, SessionState.ResourceType.JAR);
HiveConf.setVar(conf, HiveConf.ConfVars.HIVEADDEDJARS, addedJars);
addJars(addedJars);
// add plugin module jars on demand
// jobConf will hold all the configuration for hadoop, tez, and hive
JobConf jobConf = new JobConf(conf);
jobConf.set(MR_JAR_PROPERTY, "");
for (BaseWork work : sparkWork.getAllWork()) {
work.configureJobConf(jobConf);
}
addJars(conf.get(MR_JAR_PROPERTY));
// add added files
String addedFiles = Utilities.getResourceFiles(conf, SessionState.ResourceType.FILE);
HiveConf.setVar(conf, HiveConf.ConfVars.HIVEADDEDFILES, addedFiles);
addResources(addedFiles);
// add added archives
String addedArchives = Utilities.getResourceFiles(conf, SessionState.ResourceType.ARCHIVE);
HiveConf.setVar(conf, HiveConf.ConfVars.HIVEADDEDARCHIVES, addedArchives);
addResources(addedArchives);
}
private void addResources(String addedFiles) {
for (String addedFile : CSV_SPLITTER.split(Strings.nullToEmpty(addedFiles))) {
if (!localFiles.contains(addedFile)) {
localFiles.add(addedFile);
sc.addFile(addedFile);
}
}
}
private void addJars(String addedJars) {
for (String addedJar : CSV_SPLITTER.split(Strings.nullToEmpty(addedJars))) {
if (!localJars.contains(addedJar)) {
localJars.add(addedJar);
sc.addJar(addedJar);
}
}
}
@Override
public void close() {
sc.stop();
client = null;
}
}
