[jira] [Resolved] (SPARK-27818) Spark Structured Streaming executors fails with OutOfMemoryError due to KafkaMbeans

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-27818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-27818.
----------------------------------
    Resolution: Duplicate

> Spark Structured Streaming executors fails with OutOfMemoryError due to KafkaMbeans
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-27818
>                 URL: https://issues.apache.org/jira/browse/SPARK-27818
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core, Structured Streaming
>    Affects Versions: 2.3.0
>         Environment: OS: Linux
> HDP: 2.6.5.0-292
> Spark 2.3.0.2.6.5.0-292
> Kafka 1.0.0.2.6.5.0-292.
>            Reporter: Ruslan Taran
>            Priority: Major
>
> Checking the heap allocation with VirtualVM indicates that JMX Mbean Server memory usage grows linearly with time.
> After a further investigation it seems that JMX Mbean Server is filled with thousands of instances of KafkaMbean objects with metrics for consumer-\d+ that goes into thousands (equal to the number of tasks created on the executor).
> {code:java}
> $KafkaMbean.objectName._canonicalName = kafka.consumer:client-id=consumer-\d+,type=consumer-metrics
> {code}
>  
> Running Kafka consumer with DEBUG logs on the executor shows that the executor adds thousands of metrics sensors and often does not remove them at all or only removes some.
> I would expect KafkaMbeans to be cleaned once the task has been completed.
> But it seems that they are not cleaned when spark produces the following message:
>  
> {code:java}
> [Executor task launch worker for task 42 | org.apache.spark.sql.kafka010.KafkaSourceRDD] INFO : Beginning offset 37 is the same as ending offset skipping extractBytesOutput 1
> {code}
>  
> According to KafkaSourceRDD code consumer.release() is not called in this case eventually resulting in KafkaMetrics being retained in JMX Mbean Server for the corresponding task/consumer id.
>  
> Here is how I initialise structured streaming: 
> {code:java}
> sparkSession
>  .readStream
>  .format("kafka")
>  .options(Map("kafka.bootstrap.servers" -> KAFKA_BROKERS,
>               "subscribePattern" -> INPUT_TOPIC,
>               "startingOffsets" -> "earliest",
>               "failOnDataLoss" -> "false"))
>  .mapPartitions(processData)
>  .writeStream
>  .format("kafka")
>  .options(Map("kafka.bootstrap.servers" -> KAFKA_BROKERS, 
>               "checkpointLocation" -> CHECKPOINT_LOCATION))
>  .queryName("Process Data")
>  .outputMode("update")
>  .trigger(Trigger.ProcessingTime(1000))
>  .load()
>  .start()
>  .awaitTermination()
> {code}
>  
> The Kafka partitions in question often have no data due to the sporadic nature of the producer.



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