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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

Dhruv-22
by Contributor
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BUG - withColumns in pyspark doesn't handle empty dictionary

Today, while reading a delta load my notebook failed and I wanted to report a bug. The withColumns command does not tolerate an empty dictionary and gives the following error in PySpark.flat_tuple = namedtuple("flat_tuple", ["old_col", "new_col", "lo...

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K_Anudeep
Databricks Employee
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Hello @Dhruv-22 ,  I have tested this internally, and this seems to be a bug with the new Serverless env version 4  As a solution, you can try switching the version to 3 as shown bleow and re-run the above code, and it should work. 

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ak5har
by New Contributor II
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  • 9 replies
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Databricks connection to on-prem cloudera

Hello,     we are trying to evaluate Databricks solution to extract the data from existing cloudera schema hosted on physical server. We are using the Databricks serverless compute provided by databricks express setup and we assume we will not need t...

  • 2696 Views
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Adrian_Ashley
  • 2 kudos

I work for a databricks partner called Cirata.  Our Data migrator offering allows  both data and metadata replication  from cloudera to be delivered to the databricks environment , whether this is just delivering it to the ADLS2 object storage or to ...

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pepco
by New Contributor II
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Resolved! Environment in serverless

I'm playing little bit with on the Databricks free environment and I'm super confused by the documentation vs actual behavior. Maybe you could help me to understand better.For the workspace I can define base environment which I can use in serverless ...

Data Engineering
base environment
serverless
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K_Anudeep
Databricks Employee
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Hello @pepco , Is it possible to use environments with notebook tasks? Yes—but only in a very specific way. Notebook tasks can use base environments, but you don’t attach them in the job’s YAML. You pick the base env in the notebook’s Environment sid...

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JanFalta
by Visitor
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Data Masking

Hi all,I need some help on this masking problem. If you create a view with used masking function based on table.The user reading this view has to have read access to underlying table. So theoretically, he can access unmasked data in the table.I would...

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KKo
by Contributor III
  • 320 Views
  • 1 replies
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On Prem MS sql to Azure Databricks

Hi allI need to ingest data from on prem MS sql tables using Databricks to Azure Cloud. For the ingest, previously I used notebooks, jdbc connectors, read sql tables and write in unity catalog tables. Now, I want to experiment Databricks connectors f...

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AbhaySingh
Databricks Employee
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This is feature is good to go... I can't think of any disadvantages. Here is a guide.  https://landang.ca/2025/01/31/simple-data-ingestion-from-sql-server-to-databricks-using-lakeflow-connect/  

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Suheb
by New Contributor
  • 19 Views
  • 1 replies
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How have you set up a governance structure (data access control, workspace management, cluster polic

If your company uses Databricks with many people, how do you manage security, organize teams, and control costs — and what tools do you use to make it all work smoothly?

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AbhaySingh
Databricks Employee
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Please take a look here to get some initial ideas. https://medium.com/databricks-unity-catalog-sme/a-practical-guide-to-catalog-layout-data-sharing-and-distribution-with-databricks-unity-catalog-763e4c7b7351  

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him
by New Contributor III
  • 24997 Views
  • 14 replies
  • 10 kudos

i am getting the below error while making a GET request to job in databrick after successfully running it

"error_code": "INVALID_PARAMETER_VALUE",  "message": "Retrieving the output of runs with multiple tasks is not supported. Please retrieve the output of each individual task run instead."}

Capture
  • 24997 Views
  • 14 replies
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Octavian1
Contributor
  • 10 kudos

Hi @Debayan I'd suggest to also mention this explicitly in the documentation of the workspace client for get_run_outputOne has to pay extra attention to the examplerun_id=run.tasks[0].run_id otherwise it can be easily missed. 

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toproximahk
by New Contributor
  • 131 Views
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Inquiry on GraphFrame Library Upgrade Timeline for Databricks Runtime for Machine Learning

Thanks for the Databricks community and maintaining such a valuable platform.I would like to inquire if there is a planned timeline for upgrading the GraphFrame library. We’ve noticed that the latest release on GitHub is v0.9.3, while the Databricks ...

  • 131 Views
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Sem-Sinchenko
New Contributor
  • 0 kudos

You can try to add to your cluster mvn dependency manually ... For example, for spark 3.5.x it will be like:io.graphframes:graphframes-spark3_2.12:0.10.0and add a PyPi dependency graphframes-py. Adding maven coordinates should download and install al...

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alhuelamo
by New Contributor II
  • 10299 Views
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Getting non-traceable NullPointerExceptions

We're running a job that's issuing NullPointerException without traces of our job's code.Does anybody know what would be the best course of action when it comes to debugging these issues?The job is a Scala job running on DBR 11.3 LTS.In case it's rel...

  • 10299 Views
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Latest Reply
Amora
New Contributor
  • 1 kudos

You could try enabling full stack traces and checking the Spark executor logs for hidden errors. Null Pointer Exceptions in Scala on DBR often come from lazy evaluations or missing schema fields during I/O. Reviewing your Data Frame transformations a...

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Phani1
by Valued Contributor II
  • 4600 Views
  • 4 replies
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Convert EBCDIC (Binary) file format to ASCII

Hi Team,How can we convert EBCDIC (Binary) file format to ASCII in databricks? Do we have any libraries in Databricks?

  • 4600 Views
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amulight
New Contributor
  • 2 kudos

Hi Phani1 Were you able to do that successfully ? Can you share the details and steps please. Thanks.

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67
by New Contributor
  • 45 Views
  • 1 replies
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Simple integration to push data from third-party into a client's Databricks instance

Hi there, we have an industry data platform with multiple customers using it. We provide each customer with their own data every night via .csv. Some of our customers use Databricks, and import their data from us into it.We would like to offer a more...

  • 45 Views
  • 1 replies
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Latest Reply
jeffreyaven
Databricks Employee
  • 1 kudos

You could use external volumes with a Cloudflare R2 bucket as an intermediary - you write the nightly data files to R2 (using S3-compatible API), and your customers create external volumes in their Databricks workspace pointing to their designated R2...

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bidek56
by New Contributor III
  • 47 Views
  • 0 replies
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Location of spark.scheduler.allocation.file

In DBR 164.LTS, I am trying to add the following Spark config: spark.scheduler.allocation.file: file:/Workspace/init/fairscheduler.xmlBut the all purpose cluster is throwing this error Spark error: Driver down cause: com.databricks.backend.daemon.dri...

  • 47 Views
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GiriSreerangam
by New Contributor III
  • 91 Views
  • 2 replies
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Resolved! org.apache.spark.SparkRuntimeException: [UDF_USER_CODE_ERROR.GENERIC]

Hi EveryoneI am writing a small function, with spark read from a csv and spark write into a table. I could execute this function within the notebook. But, when I register the same function as a unity catalog function and calling it from Playground, i...

GiriSreerangam_0-1761761391719.png
  • 91 Views
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Latest Reply
KaushalVachhani
Databricks Employee
  • 1 kudos

Hi @GiriSreerangam, You cannot use a Unity Catalog user-defined function (UDF) in Databricks to perform Spark read from a CSV and write to a table. Unity Catalog Python UDFs execute in a secure, isolated environment without access to the file system ...

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