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[Vinti Maheshwari]

Re: Pyspark UDF as a data source for streaming

[Mich Talebzadeh]

Hi,

Do you have more info on this Jira besides the github link as I don't seem
to find it!

Thanks

Mich Talebzadeh,
Dad | Technologist | Solutions Architect | Engineer
London
United Kingdom


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On Thu, 28 Dec 2023 at 09:33, Hyukjin Kwon  wrote:

> Just fyi streaming python data source is in progress
> https://github.com/apache/spark/pull/44416 we will likely release this in
> spark 4.0
>
> On Thu, Dec 28, 2023 at 4:53 PM Поротиков Станислав Вячеславович
>  wrote:
>
>> Yes, it's actual data.
>>
>>
>>
>> Best regards,
>>
>> Stanislav Porotikov
>>
>>
>>
>> *From:* Mich Talebzadeh 
>> *Sent:* Wednesday, December 27, 2023 9:43 PM
>> *Cc:* user@spark.apache.org
>> *Subject:* Re: Pyspark UDF as a data source for streaming
>>
>>
>>
>> Is this generated data actual data or you are testing the application?
>>
>>
>>
>> Sounds like a form of Lambda architecture here with some
>> decision/processing not far from the attached diagram
>>
>>
>>
>> HTH
>>
>>
>> Mich Talebzadeh,
>>
>> Dad | Technologist | Solutions Architect | Engineer
>>
>> London
>>
>> United Kingdom
>>
>>
>>
>>  [image: Рисунок удален отправителем.]  view my Linkedin profile
>> 
>>
>>
>>
>>  https://en.everybodywiki.com/Mich_Talebzadeh
>>
>>
>>
>> *Disclaimer:* Use it at your own risk. Any and all responsibility for
>> any loss, damage or destruction of data or any other property which may
>> arise from relying on this email's technical content is explicitly
>> disclaimed. The author will in no case be liable for any monetary damages
>> arising from such loss, damage or destruction.
>>
>>
>>
>>
>>
>>
>>
>> On Wed, 27 Dec 2023 at 13:26, Поротиков Станислав Вячеславович <
>> s.poroti...@skbkontur.ru> wrote:
>>
>> Actually it's json with specific structure from API server.
>>
>> But the task is to check constantly if new data appears on API server and
>> load it to Kafka.
>>
>> Full pipeline can be presented like that:
>>
>> REST API -> Kafka -> some processing -> Kafka/Mongo -> …
>>
>>
>>
>> Best regards,
>>
>> Stanislav Porotikov
>>
>>
>>
>> *From:* Mich Talebzadeh 
>> *Sent:* Wednesday, December 27, 2023 6:17 PM
>> *To:* Поротиков Станислав Вячеславович 
>> *Cc:* user@spark.apache.org
>> *Subject:* Re: Pyspark UDF as a data source for streaming
>>
>>
>>
>> Ok so you want to generate some random data and load it into Kafka on a
>> regular interval and the rest?
>>
>>
>>
>> HTH
>>
>> Mich Talebzadeh,
>>
>> Dad | Technologist | Solutions Architect | Engineer
>>
>> London
>>
>> United Kingdom
>>
>>
>>
>>  [image: Рисунок удален отправителем.]  view my Linkedin profile
>> 
>>
>>
>>
>>  https://en.everybodywiki.com/Mich_Talebzadeh
>>
>>
>>
>> *Disclaimer:* Use it at your own risk. Any and all responsibility for
>> any loss, damage or destruction of data or any other property which may
>> arise from relying on this email's technical content is explicitly
>> disclaimed. The author will in no case be liable for any monetary damages
>> arising from such loss, damage or destruction.
>>
>>
>>
>>
>>
>>
>>
>> On Wed, 27 Dec 2023 at 12:16, Поротиков Станислав Вячеславович
>>  wrote:
>>
>> Hello!
>>
>> Is it possible to write pyspark UDF, generated data to streaming
>> dataframe?
>>
>> I want to get some data from REST API requests in real time and consider
>> to save this data to dataframe.
>>
>> And then put it to Kafka.
>>
>> I can't realise how to create streaming dataframe from generated data.
>>
>>
>>
>> I am new in spark streaming.
>>
>> Could you give me some hints?
>>
>>
>>
>> Best regards,
>>
>> Stanislav Porotikov
>>
>>
>>
>>

Re: the life cycle shuffle Dependency

[murat migdisoglu]

Hello, why would you like to delete the shuffle data yourself in the first
place?

On Thu, Dec 28, 2023, 10:08 yang chen  wrote:

>
> hi, I'm learning spark, and wonder when to delete shuffle data, I find the
> ContextCleaner class which clean the shuffle data when shuffle dependency
> is GC-ed.  Based on source code, the shuffle dependency is gc-ed only when
> active job finish, but i'm not sure,  Could you explain the life cycle of a
> Shuffle-Dependency?
>

Select Columns from Dataframe in Java

[PRASHANT L]

Team
I am using Java and want to select columns from Dataframe , columns are
stored in List
equivalent of below scala code
*  array_df=array_df.select(fields: _*)*


When I try array_df=array_df.select(fields) , I get error saying Cast to
Column

I am using Spark 3.4