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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.streaming
import org.scalatest.{FunSuite, BeforeAndAfter}
import org.scalatest.exceptions.TestFailedDueToTimeoutException
import org.scalatest.concurrent.Timeouts
import org.scalatest.time.SpanSugar._
import org.apache.spark.{SparkException, SparkConf, SparkContext}
import org.apache.spark.util.{Utils, MetadataCleaner}
import org.apache.spark.streaming.dstream.DStream
class StreamingContextSuite extends FunSuite with BeforeAndAfter with Timeouts {
val master = "local[2]"
val appName = this.getClass.getSimpleName
val batchDuration = Seconds(1)
val sparkHome = "someDir"
val envPair = "key" -> "value"
val ttl = StreamingContext.DEFAULT_CLEANER_TTL + 100
var sc: SparkContext = null
var ssc: StreamingContext = null
before {
System.clearProperty("spark.cleaner.ttl")
}
after {
if (ssc != null) {
ssc.stop()
ssc = null
}
if (sc != null) {
sc.stop()
sc = null
}
}
test("from no conf constructor") {
ssc = new StreamingContext(master, appName, batchDuration)
assert(ssc.sparkContext.conf.get("spark.master") === master)
assert(ssc.sparkContext.conf.get("spark.app.name") === appName)
assert(MetadataCleaner.getDelaySeconds(ssc.sparkContext.conf) ===
StreamingContext.DEFAULT_CLEANER_TTL)
}
test("from no conf + spark home") {
ssc = new StreamingContext(master, appName, batchDuration, sparkHome, Nil)
assert(ssc.conf.get("spark.home") === sparkHome)
assert(MetadataCleaner.getDelaySeconds(ssc.sparkContext.conf) ===
StreamingContext.DEFAULT_CLEANER_TTL)
}
test("from no conf + spark home + env") {
ssc = new StreamingContext(master, appName, batchDuration,
sparkHome, Nil, Map(envPair))
assert(ssc.conf.getExecutorEnv.exists(_ == envPair))
assert(MetadataCleaner.getDelaySeconds(ssc.sparkContext.conf) ===
StreamingContext.DEFAULT_CLEANER_TTL)
}
test("from conf without ttl set") {
val myConf = SparkContext.updatedConf(new SparkConf(false), master, appName)
ssc = new StreamingContext(myConf, batchDuration)
assert(MetadataCleaner.getDelaySeconds(ssc.conf) ===
StreamingContext.DEFAULT_CLEANER_TTL)
}
test("from conf with ttl set") {
val myConf = SparkContext.updatedConf(new SparkConf(false), master, appName)
myConf.set("spark.cleaner.ttl", ttl.toString)
ssc = new StreamingContext(myConf, batchDuration)
assert(ssc.conf.getInt("spark.cleaner.ttl", -1) === ttl)
}
test("from existing SparkContext without ttl set") {
sc = new SparkContext(master, appName)
val exception = intercept[SparkException] {
ssc = new StreamingContext(sc, batchDuration)
}
assert(exception.getMessage.contains("ttl"))
}
test("from existing SparkContext with ttl set") {
val myConf = SparkContext.updatedConf(new SparkConf(false), master, appName)
myConf.set("spark.cleaner.ttl", ttl.toString)
ssc = new StreamingContext(myConf, batchDuration)
assert(ssc.conf.getInt("spark.cleaner.ttl", -1) === ttl)
}
test("from checkpoint") {
val myConf = SparkContext.updatedConf(new SparkConf(false), master, appName)
myConf.set("spark.cleaner.ttl", ttl.toString)
val ssc1 = new StreamingContext(myConf, batchDuration)
val cp = new Checkpoint(ssc1, Time(1000))
assert(MetadataCleaner.getDelaySeconds(cp.sparkConf) === ttl)
ssc1.stop()
val newCp = Utils.deserialize[Checkpoint](Utils.serialize(cp))
assert(MetadataCleaner.getDelaySeconds(newCp.sparkConf) === ttl)
ssc = new StreamingContext(null, cp, null)
assert(MetadataCleaner.getDelaySeconds(ssc.conf) === ttl)
}
test("start multiple times") {
ssc = new StreamingContext(master, appName, batchDuration)
addInputStream(ssc).register
ssc.start()
intercept[SparkException] {
ssc.start()
}
}
test("stop multiple times") {
ssc = new StreamingContext(master, appName, batchDuration)
addInputStream(ssc).register
ssc.start()
ssc.stop()
ssc.stop()
ssc = null
}
test("stop only streaming context") {
ssc = new StreamingContext(master, appName, batchDuration)
sc = ssc.sparkContext
addInputStream(ssc).register
ssc.start()
ssc.stop(false)
ssc = null
assert(sc.makeRDD(1 to 100).collect().size === 100)
ssc = new StreamingContext(sc, batchDuration)
}
test("awaitTermination") {
ssc = new StreamingContext(master, appName, batchDuration)
val inputStream = addInputStream(ssc)
inputStream.map(x => x).register
// test whether start() blocks indefinitely or not
failAfter(2000 millis) {
ssc.start()
}
// test whether waitForStop() exits after give amount of time
failAfter(1000 millis) {
ssc.awaitTermination(500)
}
// test whether waitForStop() does not exit if not time is given
val exception = intercept[Exception] {
failAfter(1000 millis) {
ssc.awaitTermination()
throw new Exception("Did not wait for stop")
}
}
assert(exception.isInstanceOf[TestFailedDueToTimeoutException], "Did not wait for stop")
// test whether wait exits if context is stopped
failAfter(10000 millis) { // 10 seconds because spark takes a long time to shutdown
new Thread() {
override def run {
Thread.sleep(500)
ssc.stop()
}
}.start()
ssc.awaitTermination()
}
}
test("awaitTermination with error in task") {
ssc = new StreamingContext(master, appName, batchDuration)
val inputStream = addInputStream(ssc)
inputStream.map(x => { throw new TestException("error in map task"); x})
.foreachRDD(_.count)
val exception = intercept[Exception] {
ssc.start()
ssc.awaitTermination(5000)
}
assert(exception.getMessage.contains("map task"), "Expected exception not thrown")
}
test("awaitTermination with error in job generation") {
ssc = new StreamingContext(master, appName, batchDuration)
val inputStream = addInputStream(ssc)
inputStream.transform(rdd => { throw new TestException("error in transform"); rdd }).register
val exception = intercept[TestException] {
ssc.start()
ssc.awaitTermination(5000)
}
assert(exception.getMessage.contains("transform"), "Expected exception not thrown")
}
def addInputStream(s: StreamingContext): DStream[Int] = {
val input = (1 to 100).map(i => (1 to i))
val inputStream = new TestInputStream(s, input, 1)
s.registerInputStream(inputStream)
inputStream
}
}
class TestException(msg: String) extends Exception(msg)
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