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From Utkarsh Sengar <utkarsh2...@gmail.com>
Subject Re: spark.mesos.coarse impacts memory performance on mesos
Date Thu, 01 Oct 2015 23:05:29 GMT
Bumping it up, its not really a blocking issue.
But fine grain mode eats up uncertain number of resources in mesos and
launches tons of tasks, so I would prefer using the coarse grained mode if
only it didn't run out of memory.

Thanks,
-Utkarsh

On Mon, Sep 28, 2015 at 2:24 PM, Utkarsh Sengar <utkarsh2012@gmail.com>
wrote:

> Hi Tim,
>
> 1. spark.mesos.coarse:false (fine grain mode)
> This is the data dump for config and executors assigned:
> https://gist.github.com/utkarsh2012/6401d5526feccab14687
>
> 2. spark.mesos.coarse:true (coarse grain mode)
> Dump for coarse mode:
> https://gist.github.com/utkarsh2012/918cf6f8ed5945627188
>
> As you can see, exactly the same code works fine in fine grained, goes out
> of memory in coarse grained mode. First an executor was lost and then the
> driver went out of memory.
> So I am trying to understand what is different in fine grained vs coarse
> mode other than allocation of multiple mesos tasks vs 1 mesos task. Clearly
> spark is not managing memory in the same way.
>
> Thanks,
> -Utkarsh
>
>
> On Fri, Sep 25, 2015 at 9:17 AM, Tim Chen <tim@mesosphere.io> wrote:
>
>> Hi Utkarsh,
>>
>> What is your job placement like when you run fine grain mode? You said
>> coarse grain mode only ran with one node right?
>>
>> And when the job is running could you open the Spark webui and get stats
>> about the heap size and other java settings?
>>
>> Tim
>>
>> On Thu, Sep 24, 2015 at 10:56 PM, Utkarsh Sengar <utkarsh2012@gmail.com>
>> wrote:
>>
>>> 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 <utkarsh2012@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 <tim@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 <utkarsh2012@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
>>>
>>
>>
>
>
> --
> Thanks,
> -Utkarsh
>



-- 
Thanks,
-Utkarsh

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