Our team is trying to upgrade to Spark 2.0.2/Kafka 0.10.1.0 and we have
been struggling with this show stopper problem.
When we run our drivers with auto.offset.reset=latest ingesting from a
single kafka topic with 10 partitions, the driver reads correctly from all
10 partitions.
However when we use auto.offset.reset=earliest, the driver will read only a
single partition.
When we turn on the debug logs, we sometimes see partitions being set to
different offset configuration even though the consumer config correctly
indicates auto.offset.reset=earliest.
8 DEBUG Resetting offset for *partition simple_test-8 to earliest offset*.
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 9 DEBUG Resetting offset for *partition simple_test-9 to latest offset*.
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 8 TRACE Sending ListOffsetRequest
> {replica_id=-1,topics=[{topic=simple_test,partitions=[{partition=8,timestamp=-2}]}]}
> to broker 10.102.20.12:9092 (id: 12 rack: null)
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 9 TRACE Sending ListOffsetRequest
> {replica_id=-1,topics=[{topic=simple_test,partitions=[{partition=9,timestamp=-1}]}]}
> to broker 10.102.20.13:9092 (id: 13 rack: null)
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 8 TRACE Received ListOffsetResponse
> {responses=[{topic=simple_test,partition_responses=[{partition=8,error_code=0,timestamp=-1,offset=0}]}]}
> from broker 10.102.20.12:9092 (id: 12 rack: null)
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 9 TRACE Received ListOffsetResponse
> {responses=[{topic=simple_test,partition_responses=[{partition=9,error_code=0,timestamp=-1,offset=66724}]}]}
> from broker 10.102.20.13:9092 (id: 13 rack: null)
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 8 DEBUG Fetched {timestamp=-1, offset=0} for partition simple_test-8
> (org.apache.kafka.clients.consumer.internals.Fetcher)
> 9 DEBUG Fetched {timestamp=-1, offset=66724} for partition simple_test-9
> (org.apache.kafka.clients.consumer.internals.Fetcher)
I've enclosed below the completely stripped down trivial test driver that
shows this behavior. We normally run with YARN 2.7.3 but have also tried
running spark standalone mode which has the same behavior. Our drivers are
normally java but we have tried the scala version which also has the same
incorrect behavior. We have tried different LocationStrategies and
partition assignment strategies all without success. Any insight would be
greatly appreciated.
package com.xxxxx.labs.analytics.diagnostics.spark.drivers
import org.apache.kafka.common.serialization.StringDeserializer
import org.apache.spark.SparkConf
import org.apache.spark.streaming.{Seconds, StreamingContext}
import org.apache.spark.streaming.kafka010._
import org.apache.spark.streaming.kafka010.LocationStrategies
import org.apache.spark.streaming.kafka010.ConsumerStrategies
/**
*
* This driver is only for pulling data from the stream and logging
to output just to isolate single partition bug
*/
object SimpleKafkaLoggingDriver {
def main(args: Array[String]) {
if (args.length != 4) {
System.err.println("Usage: SimpleTestDriver <broker bootstrap
servers> <topic> <groupId> <offsetReset>")
System.exit(1)
}
val Array(brokers, topic, groupId, offsetReset) = args
val preferredHosts = LocationStrategies.PreferConsistent
val topics = List(topic)
val kafkaParams = Map(
"bootstrap.servers" -> brokers,
"key.deserializer" -> classOf[StringDeserializer],
"value.deserializer" -> classOf[StringDeserializer],
"group.id" -> groupId,
"auto.offset.reset" -> offsetReset,
"enable.auto.commit" -> (false: java.lang.Boolean)
)
val sparkConf = new SparkConf().setAppName("SimpleTestDriver"+"_" +topic)
val streamingContext = new StreamingContext(sparkConf, Seconds(5))
val dstream = KafkaUtils.createDirectStream[String, String](
streamingContext,
preferredHosts,
ConsumerStrategies.Subscribe[String, String](topics, kafkaParams))
dstream.foreachRDD { rdd =>
// Get the offset ranges in the RDD and log
val offsetRanges = rdd.asInstanceOf[HasOffsetRanges].offsetRanges
for (o <- offsetRanges) {
println(s"${o.topic} ${o.partition} offsets: ${o.fromOffset}
to ${o.untilOffset}")
}
}
streamingContext.start
streamingContext.awaitTermination()
}
}
16/11/17 23:08:21 INFO ConsumerConfig: ConsumerConfig values:
auto.commit.interval.ms = 5000
auto.offset.reset = earliest
bootstrap.servers = [10.102.22.11:9092, 10.102.22.12:9092]
check.crcs = true
client.id =
connections.max.idle.ms = 540000
enable.auto.commit = false
exclude.internal.topics = true
fetch.max.bytes = 52428800
fetch.max.wait.ms = 500
fetch.min.bytes = 1
group.id = simple_test_group
heartbeat.interval.ms = 3000
interceptor.classes = null
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.sample.window.ms = 30000
partition.assignment.strategy = [class
> org.apache.kafka.clients.consumer.RangeAssignor]
receive.buffer.bytes = 65536
reconnect.backoff.ms = 50
request.timeout.ms = 305000
retry.backoff.ms = 100
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.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 = null
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
Below is the output of above driver for 5 partition topic. Offsets always
remain 0 for all but a single partition in this case 3
simple_logtest 3 offsets: 1623531 to 1623531
simple_logtest 0 offsets: 0 to 0
simple_logtest 1 offsets: 0 to 0
simple_logtest 2 offsets: 0 to 0
simple_logtest 4 offsets: 0 to 0
simple_logtest 3 offsets: 1623531 to 1623531
simple_logtest 0 offsets: 0 to 0
simple_logtest 1 offsets: 0 to 0
simple_logtest 2 offsets: 0 to 0
simple_logtest 4 offsets: 0 to 0
simple_logtest 3 offsets: 1623531 to 1623531
