Bumping this one up, any suggestions on the stacktrace?
spark.mesos.coarse=true is not working and the driver crashed with the
error.
On Wed, Sep 23, 2015 at 3:29 PM, Utkarsh Sengar <utkarsh2...@gmail.com>
wrote:
> Missed to do a reply-all.
>
> Tim,
>
> spark.mesos.coarse = true doesn't work and spark.mesos.coarse = false
> works (sorry there was a typo in my last email, I meant "when I do
> "spark.mesos.coarse=false", the job works like a charm. ").
>
> I get this exception with spark.mesos.coarse = true:
>
> 15/09/22 20:18:05 INFO MongoCollectionSplitter: Created split: min={ "_id"
> : "55af4bf26750ad38a444d7cf"}, max= { "_id" : "55af5a61e8a42806f47546c1"}
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611337>15/09/22
> 20:18:05 INFO MongoCollectionSplitter: Created split: min={ "_id" :
> "55af5a61e8a42806f47546c1"}, max= null
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611453>Exception
> in thread "main" java.lang.OutOfMemoryError: Java heap space
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611524>
> at org.apache.spark.rdd.CartesianRDD.getPartitions(CartesianRDD.scala:60)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611599>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611671>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611743>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611788>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611843>
> at org.apache.spark.rdd.CartesianRDD.getPartitions(CartesianRDD.scala:60)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611918>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#611990>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612062>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612107>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612162>
> at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612245>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612317>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612389>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612434>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612489>
> at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612572>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612644>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612716>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612761>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612816>
> at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612899>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#612971>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613043>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613088>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613143>
> at
> org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:32)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613226>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:219)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613298>
> at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613370>
> at scala.Option.getOrElse(Option.scala:120)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613415>
> at org.apache.spark.rdd.RDD.partitions(RDD.scala:217)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613470>
> at org.apache.spark.ShuffleDependency.<init>(Dependency.scala:82)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613537>
> at org.apache.spark.rdd.ShuffledRDD.getDependencies(ShuffledRDD.scala:78)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613612>15/09/22
> 20:18:17 INFO SparkContext: Invoking stop() from shutdown hook
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613684>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_2_piece0 on
> some-ip-here:37706 in memory (size: 1964.0 B, free: 2.8 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613814>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_2_piece0 on mesos-slave10
> in memory (size: 1964.0 B, free: 5.2 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#613977>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_1_piece0 on
> some-ip-here:37706 in memory (size: 17.2 KB, free: 2.8 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614106>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_1_piece0 on
> mesos-slave105 in memory (size: 17.2 KB, free: 5.2 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614268>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_1_piece0 on mesos-slave1
> in memory (size: 17.2 KB, free: 5.2 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614429>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_1_piece0 on mesos-slave9
> in memory (size: 17.2 KB, free: 5.2 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614590>15/09/22
> 20:18:17 INFO BlockManagerInfo: Removed broadcast_1_piece0 on mesos-slave3
> in memory (size: 17.2 KB, free: 5.2 GB)
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614751>15/09/22
> 20:18:17 INFO SparkUI: Stopped Spark web UI at http://some-ip-here:4040
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614831>15/09/22
> 20:18:17 INFO DAGScheduler: Stopping DAGScheduler
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614890>15/09/22
> 20:18:17 INFO CoarseMesosSchedulerBackend: Shutting down all executors
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#614970>15/09/22
> 20:18:17 INFO CoarseMesosSchedulerBackend: Asking each executor to shut down
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615056>I0922
> 20:18:17.794598 171 sched.cpp:1591] Asked to stop the driver
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615125>I0922
> 20:18:17.794739 143 sched.cpp:835] Stopping framework
> '20150803-224832-1577534986-5050-1614-0016'
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615231>15/09/22
> 20:18:17 INFO CoarseMesosSchedulerBackend: driver.run() returned with code
> DRIVER_STOPPED
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615330>15/09/22
> 20:18:17 INFO MapOutputTrackerMasterEndpoint:
> MapOutputTrackerMasterEndpoint stopped!
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615425>15/09/22
> 20:18:17 INFO Utils: path =
> /tmp/spark-98801318-9c49-473b-bf2f-07ea42187252/blockmgr-0e0e1a1c-894e-4e79-beac-ead0dff43166,
> already present as root for deletion.
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615595>15/09/22
> 20:18:17 INFO MemoryStore: MemoryStore cleared
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615651>15/09/22
> 20:18:17 INFO BlockManager: BlockManager stopped
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615709>15/09/22
> 20:18:17 INFO BlockManagerMaster: BlockManagerMaster stopped
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615779>15/09/22
> 20:18:17 INFO OutputCommitCoordinator$OutputCommitCoordinatorEndpoint:
> OutputCommitCoordinator stopped!
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615892>15/09/22
> 20:18:17 INFO SparkContext: Successfully stopped SparkContext
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#615963>15/09/22
> 20:18:17 INFO Utils: Shutdown hook called
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#616014>15/09/22
> 20:18:17 INFO Utils: Deleting directory
> /tmp/spark-98801318-9c49-473b-bf2f-07ea42187252
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#616111>15/09/22
> 20:18:17 INFO RemoteActorRefProvider$RemotingTerminator: Shutting down
> remote daemon.
>
> <http://singularity-qa-uswest2.otenv.com/task/ds-tetris-simspark-usengar.2015.09.22T20.14.36-1442952963980-1-mesos_slave1_qa_uswest2.qasql.opentable.com-us_west_2a/tail/stderr#616206>15/09/22
> 20:18:17 INFO RemoteActorRefProvider$RemotingTerminator: Remote daemon shut
> down; proceeding with flushing remote transports.
>
>
>
>
> On Tue, Sep 22, 2015 at 1:26 AM, Tim Chen <t...@mesosphere.io> wrote:
>
>> Hi Utkarsh,
>>
>> Just to be sure you originally set coarse to false but then to true? Or
>> is it the other way around?
>>
>> Also what's the exception/stack trace when the driver crashed?
>>
>> Coarse grain mode per-starts all the Spark executor backends, so has the
>> least overhead comparing to fine grain. There is no single answer for which
>> mode you should use, otherwise we would have removed one of those modes
>> since it depends on your use case.
>>
>> There are quite some factor why there could be huge GC pauses, but I
>> don't think if you switch to standalone your GC pauses go away.
>>
>> Tim
>>
>> On Mon, Sep 21, 2015 at 5:18 PM, Utkarsh Sengar <utkarsh2...@gmail.com>
>> wrote:
>>
>>> I am running Spark 1.4.1 on mesos.
>>>
>>> The spark job does a "cartesian" of 4 RDDs (aRdd, bRdd, cRdd, dRdd) of
>>> size 100, 100, 7 and 1 respectively. Lets call it prouctRDD.
>>>
>>> Creation of "aRdd" needs data pull from multiple data sources, merging
>>> it and creating a tuple of JavaRdd, finally aRDD looks something like this:
>>> JavaRDD<Tuple4<A1, A2>>
>>> bRdd, cRdd and dRdds are just List<> of values.
>>>
>>> Then apply a transformation on prouctRDD and finally call
>>> "saveAsTextFile" to save the result of my transformation.
>>>
>>> Problem:
>>> By setting "spark.mesos.coarse=true", creation of "aRdd" works fine but
>>> driver crashes while doing the cartesian but when I do
>>> "spark.mesos.coarse=true", the job works like a charm. I am running spark
>>> on mesos.
>>>
>>> Comments:
>>> So I wanted to understand what role does "spark.mesos.coarse=true" plays
>>> in terms of memory and compute performance. My findings look counter
>>> intuitive since:
>>>
>>> 1. "spark.mesos.coarse=true" just runs on 1 mesos task, so there
>>> should be an overhead of spinning up mesos tasks which should impact the
>>> performance.
>>> 2. What config for "spark.mesos.coarse" recommended for running
>>> spark on mesos? Or there is no best answer and it depends on usecase?
>>> 3. Also by setting "spark.mesos.coarse=true", I notice that I get
>>> huge GC pauses even with small dataset but a long running job (but this
>>> can
>>> be a separate discussion).
>>>
>>> Let me know if I am missing something obvious, we are learning spark
>>> tuning as we move forward :)
>>>
>>> --
>>> Thanks,
>>> -Utkarsh
>>>
>>
>>
>
>
> --
> Thanks,
> -Utkarsh
>
--
Thanks,
-Utkarsh
