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https://issues.apache.org/jira/browse/SPARK-23526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16718644#comment-16718644
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Gabor Somogyi commented on SPARK-23526:
---------------------------------------
[~cloud_fan] this should be resolved in SPARK-23623. Would close this jira
unless you have objection.
> KafkaMicroBatchV2SourceSuite.ensure stream-stream self-join generates only
> one offset in offset log
> ---------------------------------------------------------------------------------------------------
>
> Key: SPARK-23526
> URL: https://issues.apache.org/jira/browse/SPARK-23526
> Project: Spark
> Issue Type: Test
> Components: Structured Streaming
> Affects Versions: 2.3.0
> Reporter: Wenchen Fan
> Priority: Major
> Labels: flaky-test
>
> See it failed in PR builder with error message:
> {code:java}
> sbt.ForkMain$ForkError:
> org.apache.spark.sql.streaming.StreamingQueryException: Query [id =
> 676a8b08-c89b-450b-8cd8-fbf9868cd240, runId =
> 46bb7aae-138b-420d-9b4f-44f42a2a4a0f] terminated with exception: Job aborted
> due to stage failure: Task 0 in stage 163.0 failed 1 times, most recent
> failure: Lost task 0.0 in stage 163.0 (TID 799, localhost, executor driver):
> java.util.ConcurrentModificationException: KafkaConsumer is not safe for
> multi-threaded access at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquire(KafkaConsumer.java:1431)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.seek(KafkaConsumer.java:1132)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer.seek(CachedKafkaConsumer.scala:305)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer.org$apache$spark$sql$kafka010$CachedKafkaConsumer$$fetchData(CachedKafkaConsumer.scala:216)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer$$anonfun$get$1.apply(CachedKafkaConsumer.scala:122)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer$$anonfun$get$1.apply(CachedKafkaConsumer.scala:106)
> at
> org.apache.spark.util.UninterruptibleThread.runUninterruptibly(UninterruptibleThread.scala:77)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer.runUninterruptiblyIfPossible(CachedKafkaConsumer.scala:68)
> at
> org.apache.spark.sql.kafka010.CachedKafkaConsumer.get(CachedKafkaConsumer.scala:106)
> at
> org.apache.spark.sql.kafka010.KafkaMicroBatchDataReader.next(KafkaMicroBatchReader.scala:353)
> at
> org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.hasNext(DataSourceRDD.scala:49)
> at
> org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
> at
> org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage2.processNext(Unknown
> Source) at
> org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
> at
> org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$11$$anon$1.hasNext(WholeStageCodegenExec.scala:616)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408) at
> org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:125)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96) at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53) at
> org.apache.spark.scheduler.Task.run(Task.scala:109) at
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345) at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745){code}
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