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Data Engineering
Join discussions on data engineering best practices, architectures, and optimization strategies within the Databricks Community. Exchange insights and solutions with fellow data engineers.
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Forum Posts

Phani1
by Valued Contributor II
  • 6041 Views
  • 1 replies
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Execute tasks parallel to process multiple files parallel

Hi all, If we have multiple tasks under the job, How to invoke a specific task under a job.Do we have any API to invoke Job and its specific tasks instead of Job.Use case: When we receive multiple messages from the event hub, each underlying task in ...

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Phani1
Valued Contributor II
  • 0 kudos

Thanks for your response, My question is ,if we have multiple tasks in a job ,How can we invoke specific task, I can see API to invoke the job but not a particular task in it. Kindly find attachment for your reference.

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klllmmm
by New Contributor II
  • 5358 Views
  • 3 replies
  • 1 kudos

Error as no such file when reading CSV file using pandas

I'm trying to read a CSV file saved in data using pandas read_csv function. But it gives No such file error.%fs ls /FileStore/tables/   df= pd.read_csv('/dbfs/FileStore/tables/CREDIT_1.CSV')     df= pd.read_csv('/dbfs:/FileStore/tables/CREDIT_1.CSV')...

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klllmmm
New Contributor II
  • 1 kudos

Thanks to @Werner Stinckens​ for the answer.I understood that I have to use spark to read data from clusters.

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yopbibo
by Contributor II
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Resolved! Column name, starting with a number

Hi,I see it is possible to start a column name with a number, like `123_test`And store in a hive table with a location in delta.On that documentation https://www.stitchdata.com/docs/destinations/databricks-delta/reference#transformations--column-nami...

  • 6635 Views
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yopbibo
Contributor II
  • 4 kudos

ha ha, yes, I try to find back the right page in DB documentation. If you have it, please, share.

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auser85
by New Contributor III
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Resolved! Cache Select on Temp Table?

How might I cache a temp table?The documentation suggests it is possible: https://docs.databricks.com/spark/latest/spark-sql/language-manual/delta-cache.htmlConsider the following on DBR 10.5 and Spark 3.2.1:```%pythondf.createOrReplaceTempView("chan...

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auser85
New Contributor III
  • 4 kudos

Thank you! The newer documentation does indeed work for me.

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Vibhor
by Contributor
  • 7007 Views
  • 5 replies
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Get current date as string in databricks using scala

I want to get current date in scala as a string for example today current date is 3rd jan, want to store it as a new variable dynamically as below, how to get it.val currdate : String = “20220103”when I am using val currdate = Calendar.getInstance.ge...

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Anonymous
Not applicable
  • 2 kudos

Hey @Vibhor Sethi​ Hope you are well!Thank you for posting your question and letting us know that you were able to resolve the issue. Would you be happy to mark it as the best solution? It would be really helpful for the other members too.Cheers!

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SailajaB
by Valued Contributor III
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An error occurred while calling o303.mount: Operation failed: "This request is not authorized to perform this operation

Hi Team,We are unable to mount storage container in below scenario We created Gen 2 using VNet and added firewall restrictions (i.e allow trusted sources)And deployed Data bricks workspace with out VNet injection. Is it possible to add databricks pub...

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Anonymous
Not applicable
  • 5 kudos

Hey @Sailaja B​ Hope everything is great!Does Hubert's response answer your question? If yes, would you be happy to mark it as best so that other members can find the solution more quickly?Thanks!

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sheree
by New Contributor III
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  • 3 replies
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Resolved! I can't access to my account.

I can't access to my account.This acccount was created today(not community, after 14 days trial it will chargable)when I'm try to access my account it gives meInvalid email address or passwordNote: Emails/usernames are case-sensitiveI tried to reset ...

  • 3191 Views
  • 3 replies
  • 1 kudos
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sheree
New Contributor III
  • 1 kudos

I got a reset link from the community. Actually the problem was with my username ,it did not identify a character within my username which was my email id.

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chandan_a_v
by Valued Contributor
  • 18132 Views
  • 6 replies
  • 6 kudos

Resolved! Spark Driver Out of Memory Issue

Hi, I am executing a simple job in Databricks for which I am getting below error. I increased the Driver size still I faced same issue. Spark config :from pyspark.sql import SparkSessionspark_session = SparkSession.builder.appName("Demand Forecasting...

  • 18132 Views
  • 6 replies
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chandan_a_v
Valued Contributor
  • 6 kudos

I am getting the above issue while writing a Spark DF as a parquet file to AWS S3. Not doing any broadcast join actually.

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William_Scardua
by Valued Contributor
  • 3037 Views
  • 1 replies
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Resolved! Best way to encrypt PII data

Hi guys, I have around 600GB per load, in you opnion, what is the best way to encrypt PII data in terms of performance ? (lib, cluster type, etc.)Thank youWilliam

  • 3037 Views
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Prabakar
Databricks Employee
  • 2 kudos

Hello @William Scardua​ please check if the blog helps you.https://databricks.com/blog/2020/11/20/enforcing-column-level-encryption-and-avoiding-data-duplication-with-pii.html

  • 2 kudos
rahul3
by New Contributor
  • 3331 Views
  • 1 replies
  • 1 kudos

Facing mount/unmount issue while running same job parallelly with scala.

 Using above configuration in cluster, when I run databricks job parallelly with multiple request at a same time, then I am getting mount/unmount issue. For an example : When I make three request to databricks job , it run 3 jobs parallelly but somet...

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  • 3331 Views
  • 1 replies
  • 1 kudos
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Prabakar
Databricks Employee
  • 1 kudos

hi @rahul upadhyay​ are you using the same mount path /mnt/rahul in all the 3 jobs? Could you please add the full error message?

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Devarsh
by Contributor
  • 10281 Views
  • 3 replies
  • 7 kudos

Resolved! Getting the error 'No such file or directory', when trying to access the json file

I am trying to write in my google sheet through Databricks but when it comes to reading the json, file containing the credentials, I am getting the error that No such file or directory exists.import gspread     gc = gspread.service_account(filename='...

  • 10281 Views
  • 3 replies
  • 7 kudos
Latest Reply
Noopur_Nigam
Databricks Employee
  • 7 kudos

Hi @Devarsh Shah​ The issue is not with json file but the location you are specifying while reading.As suggested by @Werner Stinckens​ please start using spark API to read the json file as below:spark.read.format("json").load("testjson")Please check ...

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BhagS
by New Contributor II
  • 6332 Views
  • 2 replies
  • 5 kudos

Resolved! Write Empty Delta file in Datalake

hi all,Currently, i am trying to write an empty delta file in data lake, to do this i am doing the following:Reading parquet file from my landing zone ( this file consists only of the schema of SQL tables)df=spark.read.format('parquet').load(landingZ...

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  • 5 kudos
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Noopur_Nigam
Databricks Employee
  • 5 kudos

Hi @bhagya s​ Since your source file is empty, there is no data file inside the centralizedZonePath directory i.e .parquet file is not created in the target location. However, _delta_log is the transaction log that holds the metadata of the delta for...

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Krishscientist
by New Contributor III
  • 2686 Views
  • 2 replies
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How to merge delta data..

Data from Parquet to delta converted and delta files written into diff folders based on SRC_SYS_ID....Any one help me how to merge delta data from multiple folders.Regards.

  • 2686 Views
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Noopur_Nigam
Databricks Employee
  • 0 kudos

Hi @Krishna Kommineni​ Is the table partitioned on SRC_SYS_ID col?

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