gaborgsomogyi commented on a change in pull request #19096: [SPARK-21869][SS] A
cached Kafka producer should not be closed if any task is using it - adds inuse
tracking.
URL: https://github.com/apache/spark/pull/19096#discussion_r266934509
##########
File path:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/CachedKafkaProducer.scala
##########
@@ -18,103 +18,180 @@
package org.apache.spark.sql.kafka010
import java.{util => ju}
-import java.util.concurrent.{ConcurrentMap, ExecutionException, TimeUnit}
+import java.util.concurrent.{ConcurrentLinkedQueue, ConcurrentMap,
ExecutionException, TimeUnit}
+import java.util.concurrent.atomic.AtomicInteger
+
+import scala.collection.JavaConverters._
+import scala.util.control.NonFatal
import com.google.common.cache._
import com.google.common.util.concurrent.{ExecutionError,
UncheckedExecutionException}
import org.apache.kafka.clients.producer.KafkaProducer
-import scala.collection.JavaConverters._
-import scala.util.control.NonFatal
import org.apache.spark.SparkEnv
import org.apache.spark.internal.Logging
-private[kafka010] object CachedKafkaProducer extends Logging {
+private[kafka010] case class CachedKafkaProducer(
+ private val id: String = ju.UUID.randomUUID().toString,
+ private val inUseCount: AtomicInteger = new AtomicInteger(0),
+ private val kafkaParams: Seq[(String, Object)]) extends Logging {
- private type Producer = KafkaProducer[Array[Byte], Array[Byte]]
+ private val configMap = kafkaParams.map(x => x._1 -> x._2).toMap.asJava
+
+ lazy val kafkaProducer: KafkaProducer[Array[Byte], Array[Byte]] = {
+ val producer = new KafkaProducer[Array[Byte], Array[Byte]](configMap)
+ logDebug(s"Created a new instance of KafkaProducer for " +
+ s"$kafkaParams with Id: $id")
+ closed = false
+ producer
+ }
+ private var isCached: Boolean = true
+ private var closed: Boolean = true
+ private def close(): Unit = {
+ try {
+ this.synchronized {
+ if (!closed) {
+ closed = true
+ kafkaProducer.close()
+ logInfo(s"Closed kafka producer: $kafkaProducer")
+ }
+ }
+ } catch {
+ case NonFatal(e) =>
+ logWarning(s"Error while closing kafka producer with params:
$kafkaParams", e)
+ }
+ }
+
+ private def inUse(): Boolean = {
+ inUseCount.get() > 0
+ }
+ private def unCache(): Unit = {
+ isCached = false
+ }
+ private[kafka010] def getInUseCount: Int = inUseCount.get()
Review comment:
Ah, you mean make it read-only, make sense.
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