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ExternalAppendOnlyUnsafeRowArraySuite.scala
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ExternalAppendOnlyUnsafeRowArraySuite.scala
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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.spark.sql.execution
import java.util.ConcurrentModificationException
import scala.collection.mutable.ArrayBuffer
import org.apache.spark._
import org.apache.spark.memory.MemoryTestingUtils
import org.apache.spark.sql.catalyst.expressions.UnsafeRow
class ExternalAppendOnlyUnsafeRowArraySuite extends SparkFunSuite with LocalSparkContext {
private val random = new java.util.Random()
private var taskContext: TaskContext = _
override def afterAll(): Unit = TaskContext.unset()
private def withExternalArray(inMemoryThreshold: Int, spillThreshold: Int, asQueue: Boolean)
(f: ExternalAppendOnlyUnsafeRowArray => Unit): Unit = {
sc = new SparkContext("local", "test", new SparkConf(false))
taskContext = MemoryTestingUtils.fakeTaskContext(SparkEnv.get)
TaskContext.setTaskContext(taskContext)
val array = new ExternalAppendOnlyUnsafeRowArray(
taskContext.taskMemoryManager(),
SparkEnv.get.blockManager,
SparkEnv.get.serializerManager,
taskContext,
asQueue,
1024,
SparkEnv.get.memoryManager.pageSizeBytes,
inMemoryThreshold,
spillThreshold)
try f(array) finally {
array.clear()
}
}
private def insertRow(array: ExternalAppendOnlyUnsafeRowArray): Long = {
val valueInserted = random.nextLong()
val row = new UnsafeRow(1)
row.pointTo(new Array[Byte](64), 16)
row.setLong(0, valueInserted)
array.add(row)
valueInserted
}
private def checkIfValueExists(iterator: Iterator[UnsafeRow], expectedValue: Long): Unit = {
assert(iterator.hasNext)
val actualRow = iterator.next()
assert(actualRow.getLong(0) == expectedValue)
assert(actualRow.getSizeInBytes == 16)
}
private def validateData(
array: ExternalAppendOnlyUnsafeRowArray,
expectedValues: ArrayBuffer[Long]): Iterator[UnsafeRow] = {
val iterator = array.generateIterator()
for (value <- expectedValues) {
checkIfValueExists(iterator, value)
}
assert(!iterator.hasNext)
iterator
}
private def populateRows(
array: ExternalAppendOnlyUnsafeRowArray,
numRowsToBePopulated: Int): ArrayBuffer[Long] = {
val populatedValues = new ArrayBuffer[Long]
populateRows(array, numRowsToBePopulated, populatedValues)
}
private def populateRows(
array: ExternalAppendOnlyUnsafeRowArray,
numRowsToBePopulated: Int,
populatedValues: ArrayBuffer[Long]): ArrayBuffer[Long] = {
for (_ <- 0 until numRowsToBePopulated) {
populatedValues.append(insertRow(array))
}
populatedValues
}
private def getNumBytesSpilled: Long = {
TaskContext.get().taskMetrics().memoryBytesSpilled
}
private def assertNoSpill(): Unit = {
assert(getNumBytesSpilled == 0)
}
private def assertSpill(): Unit = {
assert(getNumBytesSpilled > 0)
}
val asQueueVals = Array(false, true)
asQueueVals.foreach(q => {
test(s"insert rows less than the inMemoryThreshold $q") {
val (inMemoryThreshold, spillThreshold) = (100, 50)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
assert(array.isEmpty)
val expectedValues = populateRows(array, 1)
assert(!array.isEmpty)
assert(array.length == 1)
val iterator1 = validateData(array, expectedValues)
// Add more rows (but not too many to trigger switch to [[UnsafeExternalSorter]])
// Verify that NO spill has happened
populateRows(array, inMemoryThreshold - 1, expectedValues)
assert(array.length == inMemoryThreshold)
assertNoSpill()
val iterator2 = validateData(array, expectedValues)
assert(!iterator1.hasNext)
assert(!iterator2.hasNext)
}
}})
asQueueVals.foreach(q => {
test(s"insert rows more than the inMemoryThreshold but less than spillThreshold $q") {
val (inMemoryThreshold, spillThreshold) = (10, 50)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
assert(array.isEmpty)
val expectedValues = populateRows(array, inMemoryThreshold - 1)
assert(array.length == (inMemoryThreshold - 1))
val iterator1 = validateData(array, expectedValues)
assertNoSpill()
// Add more rows to trigger switch to [[UnsafeExternalSorter]] but not too many to cause a
// spill to happen. Verify that NO spill has happened
populateRows(array, spillThreshold - expectedValues.length - 1, expectedValues)
assert(array.length == spillThreshold - 1)
assertNoSpill()
val iterator2 = validateData(array, expectedValues)
assert(!iterator2.hasNext)
assert(!iterator1.hasNext)
intercept[ConcurrentModificationException](iterator1.next())
}
}})
asQueueVals.foreach(q => {
test(s"insert rows enough to force spill $q") {
val (inMemoryThreshold, spillThreshold) = (20, 10)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
assert(array.isEmpty)
val expectedValues = populateRows(array, inMemoryThreshold - 1)
assert(array.length == (inMemoryThreshold - 1))
val iterator1 = validateData(array, expectedValues)
assertNoSpill()
// Add more rows to trigger switch to [[UnsafeExternalSorter]] and cause a spill to happen.
// Verify that spill has happened
populateRows(array, 2, expectedValues)
assert(array.length == inMemoryThreshold + 1)
assertSpill()
val iterator2 = validateData(array, expectedValues)
assert(!iterator2.hasNext)
assert(!iterator1.hasNext)
intercept[ConcurrentModificationException](iterator1.next())
}
}})
asQueueVals.foreach(q => {
test(s"iterator on an empty array should be empty $q") {
withExternalArray(inMemoryThreshold = 4, spillThreshold = 10, q) { array =>
val iterator = array.generateIterator()
assert(array.isEmpty)
assert(array.length == 0)
assert(!iterator.hasNext)
}
}})
asQueueVals.foreach(q => {
test(s"generate iterator with negative start index $q") {
withExternalArray(inMemoryThreshold = 100, spillThreshold = 56, q) { array =>
val exception =
intercept[ArrayIndexOutOfBoundsException](array.generateIterator(startIndex = -10))
assert(exception.getMessage.contains(
"Invalid `startIndex` provided for generating iterator over the array")
)
}
}})
asQueueVals.foreach(q => {
test(s"generate iterator with start index exceeding array's size (without spill) $q") {
val (inMemoryThreshold, spillThreshold) = (20, 100)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
populateRows(array, spillThreshold / 2)
val exception =
intercept[ArrayIndexOutOfBoundsException](
array.generateIterator(startIndex = spillThreshold * 10))
assert(exception.getMessage.contains(
"Invalid `startIndex` provided for generating iterator over the array"))
}
}})
asQueueVals.foreach(q => {
test(s"generate iterator with start index exceeding array's size (with spill) $q") {
val (inMemoryThreshold, spillThreshold) = (20, 100)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
populateRows(array, spillThreshold * 2)
val exception =
intercept[ArrayIndexOutOfBoundsException](
array.generateIterator(startIndex = spillThreshold * 10))
assert(exception.getMessage.contains(
"Invalid `startIndex` provided for generating iterator over the array"))
}
}})
asQueueVals.foreach(q => {
test(s"generate iterator with custom start index (without spill) $q") {
val (inMemoryThreshold, spillThreshold) = (20, 100)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
val expectedValues = populateRows(array, inMemoryThreshold)
val startIndex = inMemoryThreshold / 2
val iterator = array.generateIterator(startIndex = startIndex)
for (i <- startIndex until expectedValues.length) {
checkIfValueExists(iterator, expectedValues(i))
}
}
}})
asQueueVals.foreach(q => {
test(s"generate iterator with custom start index (with spill) $q") {
val (inMemoryThreshold, spillThreshold) = (20, 100)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
val expectedValues = populateRows(array, spillThreshold * 10)
val startIndex = spillThreshold * 2
val iterator = array.generateIterator(startIndex = startIndex)
for (i <- startIndex until expectedValues.length) {
checkIfValueExists(iterator, expectedValues(i))
}
}
}})
asQueueVals.foreach(q => {
test(s"test iterator invalidation (without spill) $q") {
withExternalArray(inMemoryThreshold = 10, spillThreshold = 100, q) { array =>
// insert 2 rows, iterate until the first row
populateRows(array, 2)
var iterator = array.generateIterator()
assert(iterator.hasNext)
iterator.next()
// Adding more row(s) should invalidate any old iterators
populateRows(array, 1)
assert(!iterator.hasNext)
intercept[ConcurrentModificationException](iterator.next())
// Clearing the array should also invalidate any old iterators
iterator = array.generateIterator()
assert(iterator.hasNext)
iterator.next()
array.clear()
assert(!iterator.hasNext)
intercept[ConcurrentModificationException](iterator.next())
}
}})
test(s"test dequeue with spill") {
withExternalArray(inMemoryThreshold = 2, spillThreshold = 3, true) { array =>
// insert 2 rows, iterate until the first row
populateRows(array, 5)
assertSpill()
var iterator = array.generateIterator()
assert(iterator.hasNext)
val first = iterator.next()
val first2 = array.dequeue().get
assert(first.equals(first2))
val second = array.dequeue().get
assert(!second.equals(first2))
val third = array.peek().get
val third2 = array.dequeue().get
assert(third.equals(third2))
assert(array.length == 2)
array.dequeue()
populateRows(array, 10)
array.dequeue()
array.dequeue()
assert(array.length == 9)
}
}
asQueueVals.foreach(q => {
test(s"test iterator invalidation (with spill) $q") {
val (inMemoryThreshold, spillThreshold) = (2, 10)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
// Populate enough rows so that spill happens
populateRows(array, spillThreshold * 2)
assertSpill()
var iterator = array.generateIterator()
assert(iterator.hasNext)
iterator.next()
// Adding more row(s) should invalidate any old iterators
populateRows(array, 1)
assert(!iterator.hasNext)
intercept[ConcurrentModificationException](iterator.next())
// Clearing the array should also invalidate any old iterators
iterator = array.generateIterator()
assert(iterator.hasNext)
iterator.next()
array.clear()
assert(!iterator.hasNext)
intercept[ConcurrentModificationException](iterator.next())
}
}})
asQueueVals.foreach(q => {
test(s"clear on an empty the array $q") {
withExternalArray(inMemoryThreshold = 2, spillThreshold = 3, q) { array =>
val iterator = array.generateIterator()
assert(!iterator.hasNext)
// multiple clear'ing should not have an side-effect
array.clear()
array.clear()
array.clear()
assert(array.isEmpty)
assert(array.length == 0)
// Clearing an empty array should also invalidate any old iterators
assert(!iterator.hasNext)
intercept[ConcurrentModificationException](iterator.next())
}
}})
asQueueVals.foreach(q => {
test(s"clear array (without spill) $q") {
val (inMemoryThreshold, spillThreshold) = (10, 100)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
// Populate rows ... but not enough to trigger spill
populateRows(array, inMemoryThreshold / 2)
assertNoSpill()
// Clear the array
array.clear()
assert(array.isEmpty)
// Re-populate few rows so that there is no spill
// Verify the data. Verify that there was no spill
val expectedValues = populateRows(array, inMemoryThreshold / 2)
validateData(array, expectedValues)
assertNoSpill()
// Populate more rows .. enough to not trigger a spill.
// Verify the data. Verify that there was no spill
populateRows(array, inMemoryThreshold / 2, expectedValues)
validateData(array, expectedValues)
assertNoSpill()
}
}})
asQueueVals.foreach(q => {
test(s"clear array (with spill) $q") {
val (inMemoryThreshold, spillThreshold) = (10, 20)
withExternalArray(inMemoryThreshold, spillThreshold, q) { array =>
// Populate enough rows to trigger spill
populateRows(array, spillThreshold * 2)
val bytesSpilled = getNumBytesSpilled
assert(bytesSpilled > 0)
// Clear the array
array.clear()
assert(array.isEmpty)
// Re-populate the array ... but NOT upto the point that there is spill.
// Verify data. Verify that there was NO "extra" spill
val expectedValues = populateRows(array, spillThreshold / 2)
validateData(array, expectedValues)
assert(getNumBytesSpilled == bytesSpilled)
// Populate more rows to trigger spill
// Verify the data. Verify that there was "extra" spill
populateRows(array, spillThreshold * 2, expectedValues)
validateData(array, expectedValues)
assert(getNumBytesSpilled > bytesSpilled)
}
}})
}