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07 Spark on RDD 血缘关系

2022-01-02 17:01:59  阅读：136  来源： 互联网

标签：07 repository jar RDD m2 org Spark liyapeng Users


RDD 只支持粗粒度转换，即在大量记录上执行的单个操作。将创建 RDD 的一系列 Lineage（血统）记录下来，以便恢复丢失的分区。RDD 的 Lineage 会记录 RDD 的元数据信息和转换行为，当该 RDD 的部分分区数据丢失时，它可以根据这些信息来重新运算和恢复丢失的数据分区。

 

 通过，RDD的toDebugString函数我们可以看到响应的血缘关系。

import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}

/**
  * @author YaPeng Li
  * @version 0.0.1
  **/
object WordCount {

  def main(args: Array[String]): Unit = {

    val conf: SparkConf = new SparkConf().setAppName("SparkWordCount").setMaster("local[*]")

    val sc: SparkContext = new SparkContext(conf)

    val lines: RDD[String] = sc.textFile("/Users/liyapeng/Desktop/test_data.txt", 2)
    println(lines.toDebugString)

    val words: RDD[String] = lines.flatMap(_.split(" "))
    println(words.toDebugString)

    val tuples: RDD[(String, Int)] = words.map((_, 1))
    println(tuples.toDebugString)

    val sum: RDD[(String, Int)] = tuples.reduceByKey(_ + _)
    println(sum.toDebugString)

    sum.collect().foreach(println);
    sc.stop()
  }

}

从show出来的日志可以看出来，每个RDD都会保留之上RDD的全部信息。 

/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/bin/java -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=57629:/Applications/IntelliJ IDEA.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_211.jdk/Contents/Home/lib/tools.jar:/Users/liyapeng/大数据/大数据代码/lilili_scala/target/classes:/Users/liyapeng/.m2/repository/org/scala-lang/scala-library/2.10.6/scala-library-2.10.6.jar:/Users/liyapeng/.m2/repository/com/typesafe/akka/akka-actor_2.10/2.3.14/akka-actor_2.10-2.3.14.jar:/Users/liyapeng/.m2/repository/com/typesafe/config/1.2.1/config-1.2.1.jar:/Users/liyapeng/.m2/repository/com/typesafe/akka/akka-remote_2.10/2.3.14/akka-remote_2.10-2.3.14.jar:/Users/liyapeng/.m2/repository/io/netty/netty/3.8.0.Final/netty-3.8.0.Final.jar:/Users/liyapeng/.m2/repository/com/google/protobuf/protobuf-java/2.5.0/protobuf-java-2.5.0.jar:/Users/liyapeng/.m2/repository/org/uncommons/maths/uncommons-maths/1.2.2a/uncommons-maths-1.2.2a.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-core_2.10/1.6.3/spark-core_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/apache/avro/avro-mapred/1.7.7/avro-mapred-1.7.7-hadoop2.jar:/Users/liyapeng/.m2/repository/org/apache/avro/avro-ipc/1.7.7/avro-ipc-1.7.7.jar:/Users/liyapeng/.m2/repository/org/apache/avro/avro-ipc/1.7.7/avro-ipc-1.7.7-tests.jar:/Users/liyapeng/.m2/repository/org/codehaus/jackson/jackson-core-asl/1.9.13/jackson-core-asl-1.9.13.jar:/Users/liyapeng/.m2/repository/org/codehaus/jackson/jackson-mapper-asl/1.9.13/jackson-mapper-asl-1.9.13.jar:/Users/liyapeng/.m2/repository/com/twitter/chill_2.10/0.5.0/chill_2.10-0.5.0.jar:/Users/liyapeng/.m2/repository/com/esotericsoftware/kryo/kryo/2.21/kryo-2.21.jar:/Users/liyapeng/.m2/repository/com/esotericsoftware/reflectasm/reflectasm/1.07/reflectasm-1.07-shaded.jar:/Users/liyapeng/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/liyapeng/.m2/repository/org/objenesis/objenesis/1.2/objenesis-1.2.jar:/Users/liyapeng/.m2/repository/com/twitter/chill-java/0.5.0/chill-java-0.5.0.jar:/Users/liyapeng/.m2/repository/org/apache/xbean/xbean-asm5-shaded/4.4/xbean-asm5-shaded-4.4.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-launcher_2.10/1.6.3/spark-launcher_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-network-common_2.10/1.6.3/spark-network-common_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-network-shuffle_2.10/1.6.3/spark-network-shuffle_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/fusesource/leveldbjni/leveldbjni-all/1.8/leveldbjni-all-1.8.jar:/Users/liyapeng/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.4.4/jackson-annotations-2.4.4.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-unsafe_2.10/1.6.3/spark-unsafe_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/net/java/dev/jets3t/jets3t/0.7.1/jets3t-0.7.1.jar:/Users/liyapeng/.m2/repository/commons-codec/commons-codec/1.3/commons-codec-1.3.jar:/Users/liyapeng/.m2/repository/commons-httpclient/commons-httpclient/3.1/commons-httpclient-3.1.jar:/Users/liyapeng/.m2/repository/org/apache/curator/curator-recipes/2.4.0/curator-recipes-2.4.0.jar:/Users/liyapeng/.m2/repository/org/apache/curator/curator-framework/2.4.0/curator-framework-2.4.0.jar:/Users/liyapeng/.m2/repository/org/apache/zookeeper/zookeeper/3.4.5/zookeeper-3.4.5.jar:/Users/liyapeng/.m2/repository/jline/jline/0.9.94/jline-0.9.94.jar:/Users/liyapeng/.m2/repository/com/google/guava/guava/14.0.1/guava-14.0.1.jar:/Users/liyapeng/.m2/repository/org/eclipse/jetty/orbit/javax.servlet/3.0.0.v201112011016/javax.servlet-3.0.0.v201112011016.jar:/Users/liyapeng/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/liyapeng/.m2/repository/org/apache/commons/commons-math3/3.4.1/commons-math3-3.4.1.jar:/Users/liyapeng/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/liyapeng/.m2/repository/org/slf4j/slf4j-api/1.7.10/slf4j-api-1.7.10.jar:/Users/liyapeng/.m2/repository/org/slf4j/jul-to-slf4j/1.7.10/jul-to-slf4j-1.7.10.jar:/Users/liyapeng/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.10/jcl-over-slf4j-1.7.10.jar:/Users/liyapeng/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/liyapeng/.m2/repository/org/slf4j/slf4j-log4j12/1.7.10/slf4j-log4j12-1.7.10.jar:/Users/liyapeng/.m2/repository/com/ning/compress-lzf/1.0.3/compress-lzf-1.0.3.jar:/Users/liyapeng/.m2/repository/org/xerial/snappy/snappy-java/1.1.2.6/snappy-java-1.1.2.6.jar:/Users/liyapeng/.m2/repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/Users/liyapeng/.m2/repository/org/roaringbitmap/RoaringBitmap/0.5.11/RoaringBitmap-0.5.11.jar:/Users/liyapeng/.m2/repository/commons-net/commons-net/2.2/commons-net-2.2.jar:/Users/liyapeng/.m2/repository/com/typesafe/akka/akka-slf4j_2.10/2.3.11/akka-slf4j_2.10-2.3.11.jar:/Users/liyapeng/.m2/repository/org/json4s/json4s-jackson_2.10/3.2.10/json4s-jackson_2.10-3.2.10.jar:/Users/liyapeng/.m2/repository/org/json4s/json4s-core_2.10/3.2.10/json4s-core_2.10-3.2.10.jar:/Users/liyapeng/.m2/repository/org/json4s/json4s-ast_2.10/3.2.10/json4s-ast_2.10-3.2.10.jar:/Users/liyapeng/.m2/repository/org/scala-lang/scalap/2.10.0/scalap-2.10.0.jar:/Users/liyapeng/.m2/repository/org/scala-lang/scala-compiler/2.10.0/scala-compiler-2.10.0.jar:/Users/liyapeng/.m2/repository/com/sun/jersey/jersey-server/1.9/jersey-server-1.9.jar:/Users/liyapeng/.m2/repository/asm/asm/3.1/asm-3.1.jar:/Users/liyapeng/.m2/repository/com/sun/jersey/jersey-core/1.9/jersey-core-1.9.jar:/Users/liyapeng/.m2/repository/org/apache/mesos/mesos/0.21.1/mesos-0.21.1-shaded-protobuf.jar:/Users/liyapeng/.m2/repository/io/netty/netty-all/4.0.29.Final/netty-all-4.0.29.Final.jar:/Users/liyapeng/.m2/repository/com/clearspring/analytics/stream/2.7.0/stream-2.7.0.jar:/Users/liyapeng/.m2/repository/io/dropwizard/metrics/metrics-core/3.1.2/metrics-core-3.1.2.jar:/Users/liyapeng/.m2/repository/io/dropwizard/metrics/metrics-jvm/3.1.2/metrics-jvm-3.1.2.jar:/Users/liyapeng/.m2/repository/io/dropwizard/metrics/metrics-json/3.1.2/metrics-json-3.1.2.jar:/Users/liyapeng/.m2/repository/io/dropwizard/metrics/metrics-graphite/3.1.2/metrics-graphite-3.1.2.jar:/Users/liyapeng/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.4.4/jackson-databind-2.4.4.jar:/Users/liyapeng/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.4.4/jackson-core-2.4.4.jar:/Users/liyapeng/.m2/repository/com/fasterxml/jackson/module/jackson-module-scala_2.10/2.4.4/jackson-module-scala_2.10-2.4.4.jar:/Users/liyapeng/.m2/repository/org/scala-lang/scala-reflect/2.10.4/scala-reflect-2.10.4.jar:/Users/liyapeng/.m2/repository/com/thoughtworks/paranamer/paranamer/2.6/paranamer-2.6.jar:/Users/liyapeng/.m2/repository/org/apache/ivy/ivy/2.4.0/ivy-2.4.0.jar:/Users/liyapeng/.m2/repository/oro/oro/2.0.8/oro-2.0.8.jar:/Users/liyapeng/.m2/repository/org/tachyonproject/tachyon-client/0.8.2/tachyon-client-0.8.2.jar:/Users/liyapeng/.m2/repository/commons-lang/commons-lang/2.4/commons-lang-2.4.jar:/Users/liyapeng/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/liyapeng/.m2/repository/org/tachyonproject/tachyon-underfs-hdfs/0.8.2/tachyon-underfs-hdfs-0.8.2.jar:/Users/liyapeng/.m2/repository/org/tachyonproject/tachyon-underfs-s3/0.8.2/tachyon-underfs-s3-0.8.2.jar:/Users/liyapeng/.m2/repository/org/tachyonproject/tachyon-underfs-local/0.8.2/tachyon-underfs-local-0.8.2.jar:/Users/liyapeng/.m2/repository/net/razorvine/pyrolite/4.9/pyrolite-4.9.jar:/Users/liyapeng/.m2/repository/net/sf/py4j/py4j/0.9/py4j-0.9.jar:/Users/liyapeng/.m2/repository/org/spark-project/spark/unused/1.0.0/unused-1.0.0.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-sql_2.10/1.6.3/spark-sql_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/apache/spark/spark-catalyst_2.10/1.6.3/spark-catalyst_2.10-1.6.3.jar:/Users/liyapeng/.m2/repository/org/codehaus/janino/janino/2.7.8/janino-2.7.8.jar:/Users/liyapeng/.m2/repository/org/codehaus/janino/commons-compiler/2.7.8/commons-compiler-2.7.8.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-column/1.7.0/parquet-column-1.7.0.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-common/1.7.0/parquet-common-1.7.0.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-encoding/1.7.0/parquet-encoding-1.7.0.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-generator/1.7.0/parquet-generator-1.7.0.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-hadoop/1.7.0/parquet-hadoop-1.7.0.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-format/2.3.0-incubating/parquet-format-2.3.0-incubating.jar:/Users/liyapeng/.m2/repository/org/apache/parquet/parquet-jackson/1.7.0/parquet-jackson-1.7.0.jar:/Users/liyapeng/.m2/repository/org/elasticsearch/elasticsearch-spark_2.10/2.4.4/elasticsearch-spark_2.10-2.4.4.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-client/2.7.3/hadoop-client-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-common/2.7.3/hadoop-common-2.7.3.jar:/Users/liyapeng/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/liyapeng/.m2/repository/xmlenc/xmlenc/0.52/xmlenc-0.52.jar:/Users/liyapeng/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/liyapeng/.m2/repository/javax/servlet/jsp/jsp-api/2.1/jsp-api-2.1.jar:/Users/liyapeng/.m2/repository/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar:/Users/liyapeng/.m2/repository/commons-configuration/commons-configuration/1.6/commons-configuration-1.6.jar:/Users/liyapeng/.m2/repository/commons-digester/commons-digester/1.8/commons-digester-1.8.jar:/Users/liyapeng/.m2/repository/commons-beanutils/commons-beanutils/1.7.0/commons-beanutils-1.7.0.jar:/Users/liyapeng/.m2/repository/commons-beanutils/commons-beanutils-core/1.8.0/commons-beanutils-core-1.8.0.jar:/Users/liyapeng/.m2/repository/org/apache/avro/avro/1.7.4/avro-1.7.4.jar:/Users/liyapeng/.m2/repository/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-auth/2.7.3/hadoop-auth-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/httpcomponents/httpclient/4.2.5/httpclient-4.2.5.jar:/Users/liyapeng/.m2/repository/org/apache/httpcomponents/httpcore/4.2.4/httpcore-4.2.4.jar:/Users/liyapeng/.m2/repository/org/apache/directory/server/apacheds-kerberos-codec/2.0.0-M15/apacheds-kerberos-codec-2.0.0-M15.jar:/Users/liyapeng/.m2/repository/org/apache/directory/server/apacheds-i18n/2.0.0-M15/apacheds-i18n-2.0.0-M15.jar:/Users/liyapeng/.m2/repository/org/apache/directory/api/api-asn1-api/1.0.0-M20/api-asn1-api-1.0.0-M20.jar:/Users/liyapeng/.m2/repository/org/apache/directory/api/api-util/1.0.0-M20/api-util-1.0.0-M20.jar:/Users/liyapeng/.m2/repository/org/apache/curator/curator-client/2.7.1/curator-client-2.7.1.jar:/Users/liyapeng/.m2/repository/org/apache/htrace/htrace-core/3.1.0-incubating/htrace-core-3.1.0-incubating.jar:/Users/liyapeng/.m2/repository/org/apache/commons/commons-compress/1.4.1/commons-compress-1.4.1.jar:/Users/liyapeng/.m2/repository/org/tukaani/xz/1.0/xz-1.0.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-hdfs/2.7.3/hadoop-hdfs-2.7.3.jar:/Users/liyapeng/.m2/repository/org/mortbay/jetty/jetty-util/6.1.26/jetty-util-6.1.26.jar:/Users/liyapeng/.m2/repository/xerces/xercesImpl/2.9.1/xercesImpl-2.9.1.jar:/Users/liyapeng/.m2/repository/xml-apis/xml-apis/1.3.04/xml-apis-1.3.04.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-app/2.7.3/hadoop-mapreduce-client-app-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-common/2.7.3/hadoop-mapreduce-client-common-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-yarn-client/2.7.3/hadoop-yarn-client-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-yarn-server-common/2.7.3/hadoop-yarn-server-common-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-shuffle/2.7.3/hadoop-mapreduce-client-shuffle-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-yarn-api/2.7.3/hadoop-yarn-api-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-core/2.7.3/hadoop-mapreduce-client-core-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-yarn-common/2.7.3/hadoop-yarn-common-2.7.3.jar:/Users/liyapeng/.m2/repository/javax/xml/bind/jaxb-api/2.2.2/jaxb-api-2.2.2.jar:/Users/liyapeng/.m2/repository/javax/xml/stream/stax-api/1.0-2/stax-api-1.0-2.jar:/Users/liyapeng/.m2/repository/javax/activation/activation/1.1/activation-1.1.jar:/Users/liyapeng/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar:/Users/liyapeng/.m2/repository/com/sun/jersey/jersey-client/1.9/jersey-client-1.9.jar:/Users/liyapeng/.m2/repository/org/codehaus/jackson/jackson-jaxrs/1.9.13/jackson-jaxrs-1.9.13.jar:/Users/liyapeng/.m2/repository/org/codehaus/jackson/jackson-xc/1.9.13/jackson-xc-1.9.13.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-jobclient/2.7.3/hadoop-mapreduce-client-jobclient-2.7.3.jar:/Users/liyapeng/.m2/repository/org/apache/hadoop/hadoop-annotations/2.7.3/hadoop-annotations-2.7.3.jar WordCount
(2) /Users/liyapeng/Desktop/test_data.txt MapPartitionsRDD[1] at textFile at WordCount.scala:16 []
 |  /Users/liyapeng/Desktop/test_data.txt HadoopRDD[0] at textFile at WordCount.scala:16 []
(2) MapPartitionsRDD[2] at flatMap at WordCount.scala:19 []
 |  /Users/liyapeng/Desktop/test_data.txt MapPartitionsRDD[1] at textFile at WordCount.scala:16 []
 |  /Users/liyapeng/Desktop/test_data.txt HadoopRDD[0] at textFile at WordCount.scala:16 []
(2) MapPartitionsRDD[3] at map at WordCount.scala:22 []
 |  MapPartitionsRDD[2] at flatMap at WordCount.scala:19 []
 |  /Users/liyapeng/Desktop/test_data.txt MapPartitionsRDD[1] at textFile at WordCount.scala:16 []
 |  /Users/liyapeng/Desktop/test_data.txt HadoopRDD[0] at textFile at WordCount.scala:16 []
(2) ShuffledRDD[4] at reduceByKey at WordCount.scala:25 []
 +-(2) MapPartitionsRDD[3] at map at WordCount.scala:22 []
    |  MapPartitionsRDD[2] at flatMap at WordCount.scala:19 []
    |  /Users/liyapeng/Desktop/test_data.txt MapPartitionsRDD[1] at textFile at WordCount.scala:16 []
    |  /Users/liyapeng/Desktop/test_data.txt HadoopRDD[0] at textFile at WordCount.scala:16 []
(What is Apache Spark™?,1)
(Apache Spark™ is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters.,1)

Process finished with exit code 0

标签：07,repository,jar,RDD,m2,org,Spark,liyapeng,Users
来源： https://blog.csdn.net/lucklilili/article/details/122277844

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