/*
* 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.test;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import java.util.HashSet;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat;
import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit;
import org.apache.pig.impl.plan.OperatorKey;
import junit.framework.Assert;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.Test;
public class TestSplitCombine {
private Configuration conf;
private TestPigInputFormat pigInputFormat;
private ArrayList<OperatorKey> ok;
class TestPigInputFormat extends PigInputFormat {
public List<InputSplit> getPigSplits(List<InputSplit> oneInputSplits,
int inputIndex, ArrayList<OperatorKey> targetOps,
Path path, boolean combinable, Configuration conf)
throws IOException, InterruptedException {
return super.getPigSplits(oneInputSplits, inputIndex, targetOps,
1000, combinable, conf);
}
}
class DummyInputSplit extends InputSplit {
private final long length;
private final String[] locations;
public DummyInputSplit(long len, String[] locs) {
length = len;
locations = locs;
}
@Override
public long getLength() {
return length;
}
@Override
public String[] getLocations() {
return locations;
}
}
@Before
public void setUp() throws Exception {
conf = new Configuration();
conf.setLong("pig.maxCombinedSplitSize", 1000);
pigInputFormat = new TestPigInputFormat();
ok = new ArrayList<OperatorKey>();
ok.add(new OperatorKey());
}
@Test
public void test1() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(result.size(), 2);
int index = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (index == 0) {
Assert.assertEquals(2, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(500, pigSplit.getLength(0));
Assert.assertEquals(400, pigSplit.getLength(1));
}
else {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l4", "l5"
});
Assert.assertEquals(400, pigSplit.getLength(0));
}
index++;
}
}
@Test
public void test2() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(600, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(700, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(800, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(result.size(), 3);
int index = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (index == 0) {
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l4", "l5"
});
Assert.assertEquals(1, len);
Assert.assertEquals(800, pigSplit.getLength(0));
}
else if (index == 1) {
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(1, len);
Assert.assertEquals(700, pigSplit.getLength(0));
}
else {
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(1, len);
Assert.assertEquals(600, pigSplit.getLength(0));
}
index++;
}
}
@Test
public void test3() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(1, result.size());
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
Assert.assertEquals(3, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3", "l4", "l5"
});
Assert.assertEquals(500, pigSplit.getLength(0));
Assert.assertEquals(200, pigSplit.getLength(1));
Assert.assertEquals(100, pigSplit.getLength(2));
}
}
@Test
public void test4() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l4", "l5"
}));
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(2, result.size());
int idx = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (idx == 0) {
Assert.assertEquals(2, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l4", "l5"
});
Assert.assertEquals(500, pigSplit.getLength(0));
Assert.assertEquals(100, pigSplit.getLength(1));
}
else {
Assert.assertEquals(4, len);
Assert.assertEquals(500, pigSplit.getLength(0));
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(200, pigSplit.getLength(1));
Assert.assertEquals(200, pigSplit.getLength(2));
Assert.assertEquals(100, pigSplit.getLength(3));
}
idx++;
}
}
@Test
public void test5() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, false, conf);
Assert.assertEquals(3, result.size());
int index = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (index == 0) {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(500, pigSplit.getLength(0));
}
else if (index == 1) {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(400, pigSplit.getLength(0));
}
else {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l4", "l5"
});
Assert.assertEquals(400, pigSplit.getLength(0));
}
index++;
}
}
@Test
public void test6() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(600, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(300, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(3, result.size());
int idx = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (idx == 0) {
Assert.assertEquals(2, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(600, pigSplit.getLength(0));
Assert.assertEquals(400, pigSplit.getLength(1));
}
else if (idx == 1) {
Assert.assertEquals(3, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(500, pigSplit.getLength(0));
Assert.assertEquals(300, pigSplit.getLength(1));
Assert.assertEquals(200, pigSplit.getLength(2));
}
else {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(100, pigSplit.getLength(0));
}
idx++;
}
}
@Test
public void test7() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(300, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(500, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(600, new String[] {
"l1", "l2", "l3"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(3, result.size());
int idx = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
if (idx == 0) {
Assert.assertEquals(2, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(600, pigSplit.getLength(0));
Assert.assertEquals(400, pigSplit.getLength(1));
}
else if (idx == 1) {
Assert.assertEquals(3, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(500, pigSplit.getLength(0));
Assert.assertEquals(300, pigSplit.getLength(1));
Assert.assertEquals(200, pigSplit.getLength(2));
}
else {
Assert.assertEquals(1, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3"
});
Assert.assertEquals(100, pigSplit.getLength(0));
}
idx++;
}
}
@Test
public void test8() throws IOException, InterruptedException {
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l1", "l4", "l5"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(result.size(), 1);
int index = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
Assert.assertEquals(3, len);
checkLocations(pigSplit.getLocations(), new String[] {
"l1", "l2", "l3", "l4", "l5"
});
Assert.assertEquals(200, pigSplit.getLength(0));
Assert.assertEquals(100, pigSplit.getLength(1));
Assert.assertEquals(100, pigSplit.getLength(2));
index++;
}
}
@Test
public void test9() throws IOException, InterruptedException {
// verify locations in order
ArrayList<InputSplit> rawSplits = new ArrayList<InputSplit>();
rawSplits.add(new DummyInputSplit(100, new String[] {
"l1", "l2", "l3"
}));
rawSplits.add(new DummyInputSplit(200, new String[] {
"l3", "l4", "l5"
}));
rawSplits.add(new DummyInputSplit(400, new String[] {
"l5", "l6", "l1"
}));
List<InputSplit> result = pigInputFormat.getPigSplits(rawSplits, 0, ok,
null, true, conf);
Assert.assertEquals(result.size(), 1);
int index = 0;
for (InputSplit split : result) {
PigSplit pigSplit = (PigSplit) split;
int len = pigSplit.getNumPaths();
Assert.assertEquals(3, len);
// only 5 locations are in list: refer to PIG-1648 for more details
checkLocationOrdering(pigSplit.getLocations(), new String[] {
"l5", "l1", "l6", "l3", "l4"
});
Assert.assertEquals(400, pigSplit.getLength(0));
Assert.assertEquals(200, pigSplit.getLength(1));
Assert.assertEquals(100, pigSplit.getLength(2));
index++;
}
}
private void checkLocations(String[] actual, String[] expected) {
HashSet<String> expectedSet = new HashSet<String>();
for (String str : expected)
expectedSet.add(str);
int count = 0;
for (String str : actual) {
if (expectedSet.contains(str)) count++;
}
Assert.assertEquals(count, expected.length);
}
private void checkLocationOrdering(String[] actual, String[] expected) {
Assert.assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i++)
Assert.assertEquals(expected[i], actual[i]);
}
}