skonto 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_r263327454
##########
File path:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/CachedKafkaProducer.scala
##########
@@ -29,51 +30,76 @@ 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(id: String, inUseCount:
AtomicInteger,
+ kafkaProducer: KafkaProducer[Array[Byte], Array[Byte]]) extends Logging {
+ private var closed: Boolean = false
+ private def close(): Unit = this.synchronized {
+ if (!closed) {
+ closed = true
+ kafkaProducer.close()
+ logInfo(s"Closed kafka producer: $kafkaProducer")
+ }
+ }
+
+ def flush(): Unit = {
+ kafkaProducer.flush()
+ }
+
+ private[kafka010] def isClosed: Boolean = closed
+}
- private type Producer = KafkaProducer[Array[Byte], Array[Byte]]
+private[kafka010] object CachedKafkaProducer extends Logging {
private lazy val cacheExpireTimeout: Long =
SparkEnv.get.conf.getTimeAsMs("spark.kafka.producer.cache.timeout", "10m")
- private val cacheLoader = new CacheLoader[Seq[(String, Object)], Producer] {
- override def load(config: Seq[(String, Object)]): Producer = {
+ private val cacheLoader = new CacheLoader[Seq[(String, Object)],
CachedKafkaProducer] {
+ override def load(config: Seq[(String, Object)]): CachedKafkaProducer = {
val configMap = config.map(x => x._1 -> x._2).toMap.asJava
createKafkaProducer(configMap)
}
}
- private val removalListener = new RemovalListener[Seq[(String, Object)],
Producer]() {
+ private val closeQueue = new ConcurrentLinkedQueue[CachedKafkaProducer]()
+
+ private val removalListener = new RemovalListener[Seq[(String, Object)],
CachedKafkaProducer]() {
override def onRemoval(
- notification: RemovalNotification[Seq[(String, Object)], Producer]):
Unit = {
- val paramsSeq: Seq[(String, Object)] = notification.getKey
- val producer: Producer = notification.getValue
- logDebug(
- s"Evicting kafka producer $producer params: $paramsSeq, due to
${notification.getCause}")
- close(paramsSeq, producer)
+ notification: RemovalNotification[Seq[(String, Object)],
CachedKafkaProducer]): Unit = {
+ val producer: CachedKafkaProducer = notification.getValue
+ logDebug(s"Evicting kafka producer $producer, due to
${notification.getCause}")
+ if (producer.inUseCount.intValue() > 0) {
+ // When a inuse producer is evicted we wait for it to be released
before finally closing it.
+ closeQueue.add(producer)
+ } else {
+ close(producer)
Review comment:
Could you print the producer UUID here as well for tracking reasons?
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