<properties>
    <scala.version>2.11.8</scala.version>
    <kafka.version>0.10.2.2</kafka.version>
    <spark.version>2.4.0</spark.version>
  </properties>
  
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-streaming_2.11</artifactId>
      <version>${spark.version}</version>
    </dependency>

    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-streaming-kafka-0-10_2.11</artifactId>
      <version>${spark.version}</version>
    </dependency>

sparkstreaming应用程序

package com.kun.kafka_offset


import org.apache.spark.streaming.kafka010.LocationStrategies.PreferConsistent
import org.apache.kafka.common.serialization.StringDeserializer
import org.apache.spark.SparkConf
import org.apache.spark.streaming.kafka010.KafkaUtils
import org.apache.spark.streaming.{Seconds, StreamingContext}
import org.apache.spark.streaming.kafka010.ConsumerStrategies.Subscribe

object Offset01APP {
  def main(args: Array[String]): Unit = {
    System.setProperty("hadoop.home.dir", "D:\hadoop-common-2.2.0-bin-master")
    val sparkConf=new SparkConf().setAppName("Offset01APP").setMaster("local[2]")
    val ssc=new StreamingContext(sparkConf,Seconds(10))

    val kfakaParams=Map[String,Object](
      "bootstrap.servers"->"192.168.232.8:9092",
      "auto.offset.reset"-> "earliest",//latest, earliest, none
      "key.deserializer" -> classOf[StringDeserializer],
      "value.deserializer" -> classOf[StringDeserializer],
      "group.id" -> "hello_topic_test"
    )

    val topics = Array("hello_topic")
    val messages=KafkaUtils.createDirectStream[String,String](
      ssc,
      PreferConsistent,
      Subscribe[String, String](topics, kfakaParams))

    messages.foreachRDD(rdd=>
    if(!rdd.isEmpty()){
      println("无妄："+rdd.count())
    }
    )

    ssc.start()
    ssc.awaitTermination()
  }
}

输出日志

"C:\Program Files\Java\jdk1.8.0_191\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 
18/12/20 20:45:00 INFO ConsumerConfig: ConsumerConfig values: 
	auto.commit.interval.ms = 5000
	auto.offset.reset = earliest
	bootstrap.servers = [192.168.232.8:9092]
	check.crcs = true
	client.id = 
	connections.max.idle.ms = 540000
	default.api.timeout.ms = 60000
	enable.auto.commit = true
	exclude.internal.topics = true
	fetch.max.bytes = 52428800
	fetch.max.wait.ms = 500
	fetch.min.bytes = 1
	group.id = hello_topic_test
	heartbeat.interval.ms = 3000
	interceptor.classes = []
	internal.leave.group.on.close = true
	isolation.level = read_uncommitted
	key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer
	max.partition.fetch.bytes = 1048576
	max.poll.interval.ms = 300000
	max.poll.records = 500
	metadata.max.age.ms = 300000
	metric.reporters = []
	metrics.num.samples = 2
	metrics.recording.level = INFO
	metrics.sample.window.ms = 30000
	partition.assignment.strategy = [class org.apache.kafka.clients.consumer.RangeAssignor]
	receive.buffer.bytes = 65536
	reconnect.backoff.max.ms = 1000
	reconnect.backoff.ms = 50
	request.timeout.ms = 30000
	retry.backoff.ms = 100
	sasl.client.callback.handler.class = null
	sasl.jaas.config = null
	sasl.kerberos.kinit.cmd = /usr/bin/kinit
	sasl.kerberos.min.time.before.relogin = 60000
	sasl.kerberos.service.name = null
	sasl.kerberos.ticket.renew.jitter = 0.05
	sasl.kerberos.ticket.renew.window.factor = 0.8
	sasl.login.callback.handler.class = null
	sasl.login.class = null
	sasl.login.refresh.buffer.seconds = 300
	sasl.login.refresh.min.period.seconds = 60
	sasl.login.refresh.window.factor = 0.8
	sasl.login.refresh.window.jitter = 0.05
	sasl.mechanism = GSSAPI
	security.protocol = PLAINTEXT
	send.buffer.bytes = 131072
	session.timeout.ms = 10000
	ssl.cipher.suites = null
	ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
	ssl.endpoint.identification.algorithm = https
	ssl.key.password = null
	ssl.keymanager.algorithm = SunX509
	ssl.keystore.location = null
	ssl.keystore.password = null
	ssl.keystore.type = JKS
	ssl.protocol = TLS
	ssl.provider = null
	ssl.secure.random.implementation = null
	ssl.trustmanager.algorithm = PKIX
	ssl.truststore.location = null
	ssl.truststore.password = null
	ssl.truststore.type = JKS
	value.deserializer = class org.apache.kafka.common.serialization.StringDeserializer

18/12/20 20:45:01 INFO AppInfoParser: Kafka version : 2.0.0
18/12/20 20:45:01 INFO AppInfoParser: Kafka commitId : 3402a8361b734732
18/12/20 20:45:01 INFO Metadata: Cluster ID: nt6HH1AcQRuYzwWWKcBJfw
18/12/20 20:45:01 INFO AbstractCoordinator: [Consumer clientId=consumer-1, groupId=hello_topic_test] Discovered group coordinator 192.168.232.8:9092 (id: 2147483647 rack: null)
18/12/20 20:45:01 INFO ConsumerCoordinator: [Consumer clientId=consumer-1, groupId=hello_topic_test] Revoking previously assigned partitions []
18/12/20 20:45:01 INFO AbstractCoordinator: [Consumer clientId=consumer-1, groupId=hello_topic_test] (Re-)joining group
18/12/20 20:45:01 INFO AbstractCoordinator: [Consumer clientId=consumer-1, groupId=hello_topic_test] Successfully joined group with generation 37
18/12/20 20:45:01 INFO ConsumerCoordinator: [Consumer clientId=consumer-1, groupId=hello_topic_test] Setting newly assigned partitions [hello_topic-0]
18/12/20 20:45:01 INFO RecurringTimer: Started timer for JobGenerator at time 1545309910000
18/12/20 20:45:01 INFO JobGenerator: Started JobGenerator at 1545309910000 ms
18/12/20 20:45:01 INFO JobScheduler: Started JobScheduler
18/12/20 20:45:01 INFO StreamingContext: StreamingContext started
18/12/20 20:45:10 INFO Fetcher: [Consumer clientId=consumer-1, groupId=hello_topic_test] Resetting offset for partition hello_topic-0 to offset 906.

PK哥；我测试spark2.4和kafka0.10.2.2 怎么测试它的count值都不会出现你的那种情况。。。也不会从头消费；好搞笑啊；我设置的earliest；它竟然还是从末尾
groupId=hello_topic_test] Resetting offset for partition hello_topic-0 to offset 906.