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https://issues.apache.org/jira/browse/HIVE-9127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14249427#comment-14249427
]
Xuefu Zhang commented on HIVE-9127:
-----------------------------------
Hi [~lirui], I think this JIRA was re-purposed to enhance getSplit performance.
Brock created HIVE-9135 for cloning Map/Reduce-Work.
> Improve CombineHiveInputFormat.getSplit performance
> ---------------------------------------------------
>
> Key: HIVE-9127
> URL: https://issues.apache.org/jira/browse/HIVE-9127
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Affects Versions: spark-branch
> Reporter: Brock Noland
> Assignee: Brock Noland
> Attachments: HIVE-9127.1-spark.patch.txt,
> HIVE-9127.2-spark.patch.txt, HIVE-9127.3.patch.txt
>
>
> In HIVE-7431 we disabled caching of Map/Reduce works because some tasks would
> fail. However, we should be able to cache these objects in RSC for split
> generation. See:
> https://issues.apache.org/jira/browse/HIVE-9124?focusedCommentId=14248622&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14248622
> how this impacts performance.
> Caller ST:
> {noformat}
> ....
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileInputFormatShim.getSplits(HadoopShimsSecure.java:328)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getCombineSplits(CombineHiveInputFormat.java:421)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:510)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:201)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:205)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:203)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.Option.getOrElse(Option.scala:120)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD.partitions(RDD.scala:203)
> 2014-12-16 14:36:22,202 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:205)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:203)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.Option.getOrElse(Option.scala:120)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD.partitions(RDD.scala:203)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.ShuffleDependency.<init>(Dependency.scala:79)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.ShuffledRDD.getDependencies(ShuffledRDD.scala:80)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$dependencies$2.apply(RDD.scala:192)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD$$anonfun$dependencies$2.apply(RDD.scala:190)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.Option.getOrElse(Option.scala:120)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.rdd.RDD.dependencies(RDD.scala:190)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGScheduler.visit$1(DAGScheduler.scala:301)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGScheduler.getParentStages(DAGScheduler.scala:313)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGScheduler.newStage(DAGScheduler.scala:247)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGScheduler.handleJobSubmitted(DAGScheduler.scala:735)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1382)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.actor.Actor$class.aroundReceive(Actor.scala:465)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> org.apache.spark.scheduler.DAGSchedulerEventProcessActor.aroundReceive(DAGScheduler.scala:1368)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.actor.ActorCell.invoke(ActorCell.scala:487)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.dispatch.Mailbox.run(Mailbox.scala:220)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> 2014-12-16 14:36:22,203 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> 2014-12-16 14:36:22,204 INFO [stdout-redir-1]: client.SparkClientImpl
> (SparkClientImpl.java:run(435)) - at
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> {noformat}
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