There is not much code, I am using spark-shell provided by Spark 2.4 and
Spark 3.
val dp = spark.read.json("/Users/<userhome>/data/dailyparams/20200528")
On Mon, Jun 29, 2020 at 2:25 AM Gourav Sengupta <gourav.sengu...@gmail.com>
wrote:
> Hi,
>
> can you please share the SPARK code?
>
>
>
> Regards,
> Gourav
>
> On Sun, Jun 28, 2020 at 12:58 AM Sanjeev Mishra <sanjeev.mis...@gmail.com>
> wrote:
>
>>
>> I have large amount of json files that Spark can read in 36 seconds but
>> Spark 3.0 takes almost 33 minutes to read the same. On closer analysis,
>> looks like Spark 3.0 is choosing different DAG than Spark 2.0. Does anyone
>> have any idea what is going on? Is there any configuration problem with
>> Spark 3.0.
>>
>> Here are the details:
>>
>> *Spark 2.4*
>>
>> Summary Metrics for 2203 Completed Tasks
>> <http://10.0.0.8:4040/stages/stage/?id=0&attempt=0#tasksTitle>
>> MetricMin25th percentileMedian75th percentileMax
>> Duration 0.0 ms 0.0 ms 0.0 ms 1.0 ms 62.0 ms
>> GC Time 0.0 ms 0.0 ms 0.0 ms 0.0 ms 11.0 ms
>> Showing 1 to 2 of 2 entries
>> Aggregated Metrics by Executor
>> Show 204060100All entries
>> Search:
>> Executor IDLogsAddressTask TimeTotal TasksFailed TasksKilled TasksSucceeded
>> TasksBlacklisted
>> driver 10.0.0.8:49159 36 s 2203 0 0 2203 false
>>
>>
>> *Spark 3.0*
>>
>> Summary Metrics for 8 Completed Tasks
>> <http://10.0.0.8:4040/stages/stage/?id=1&attempt=0&task.eventTimelinePageNumber=1&task.eventTimelinePageSize=47#tasksTitle>
>> MetricMin25th percentileMedian75th percentileMax
>> Duration 3.8 min 4.0 min 4.1 min 4.4 min 5.0 min
>> GC Time 3 s 3 s 3 s 4 s 4 s
>> Input Size / Records 15.6 MiB / 51028 16.2 MiB / 53303 16.8 MiB / 55259 17.8
>> MiB / 58148 20.2 MiB / 71624
>> Showing 1 to 3 of 3 entries
>> Aggregated Metrics by Executor
>> Show 204060100All entries
>> Search:
>> Executor IDLogsAddressTask TimeTotal TasksFailed TasksKilled TasksSucceeded
>> TasksBlacklistedInput Size / Records
>> driver 10.0.0.8:50224 33 min 8 0 0 8 false 136.1 MiB / 451999
>>
>>
>> The DAG is also different
>> Spark 2.0 DAG
>>
>> [image: Screenshot 2020-06-27 16.30.26.png]
>>
>> Spark 3.0 DAG
>>
>> [image: Screenshot 2020-06-27 16.32.32.png]
>>
>>
>>
