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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

ramsai
by New Contributor
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Updating Job Creator to Service Principal

Regarding data governance best practices: I have jobs created by a user who has left the organization, and I need to change the job creator to a service principal. Currently, it seems the only option is to clone the job and update it. Is this the rec...

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Dhruv-22
by Contributor II
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BUG: Merge with schema evolution doesn't work in update clause

I am referring to this link of databricks documentation. Here is a screenshot of the same  According to the documentation the UPDATE command should work when the target table doesn't have the column but it is present in source. I tried the same with ...

Screenshot 2026-01-09 at 16.33.15.png Dhruv22_0-1767956896097.png
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Dhruv-22
Contributor II
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Hi @iyashk-DBThanks for the response, it will help in resolving the issue.But, can you mark it as a bug and report it? Because specifying just the column without the table name is a little risky.

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Ved88
by New Contributor II
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databricks all-purpose cluster

getting below error-Failure starting repl. Try detaching and re-attaching the notebook. while executing notebook and can see cluster have all installed lib.

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Ved88
New Contributor II
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Hi ,this issue might be related to hive metastore migration related.PFBi can see driver log having this connection issue which matching the host in below url-IP CIDR For Azure Databricks Hive Metastore - Databricks Community - 133401Caused by: java.s...

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SaugatMukherjee
by New Contributor III
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Structured streaming for iceberg tables

According to this https://iceberg.apache.org/docs/latest/spark-structured-streaming/ , we can stream from iceberg tables. I have ensured that my source table is Iceberg version 3, but no matter what I do, I get Iceberg does not streaming reads. Looki...

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SaugatMukherjee
New Contributor III
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Hi,Iceberg streaming is possible in Databricks. One does not need to change to Delta Lake. In my previous attempt, I used "load" while reading the source iceberg table. One should instead use "table". Load apparently seems to take a path and not a ta...

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rcatelli
by New Contributor
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OBO auth implementation in Streamlit not working

Hello,I am currently trying to implement OBO auth in  a streamlit db app but I'm getting the following error message:requests.exceptions.HTTPError: 400 Client Error: PERMISSION_DENIED: User does not have USE CATALOG on Catalog '...'. Config: host=, a...

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NandiniN
Databricks Employee
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Hi @rcatelli  Here's a quick example https://docs.databricks.com/aws/en/dev-tools/databricks-apps/auth#user-authorization https://docs.databricks.com/aws/en/dev-tools/databricks-apps/auth#example-query-with-user-authorization  Get the user token from...

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Naren1
by Visitor
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CLuster Config

Hi, can we pass a parameter into job activity from ADF side to change the environment inside the job cluster configuration?

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K_Anudeep
Databricks Employee
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Hello @Naren1 , Yes — you can pass parameters from ADF to a Databricks Job run, but you generally can’t use those parameters to change the job cluster configuration (node type, Spark version, autoscale, init scripts, etc.) for that run.In an ADF Data...

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halsgbs
by New Contributor
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Alert ID within job yaml file - different environments

Hi, I am trying to trigger an alert through a job, and the issue I'm experiencing is that we have the same alert name in our dev/test/pre/prod environments but they will all have different alert IDs. And I have to input an alert id within the job yam...

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Raman_Unifeye
Contributor III
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@halsgbs your notebook task workaround failed as Databricks Jobs expect a static alert_id at the time the job is submitted or created, not a dynamic variable evaluated during the run.The best way to deal with this is Asset Bundle (DAB) where you get ...

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turagittech
by Contributor
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Databricks Governance Dashboards

I am looking for any prebuilt governance dashboards. I see in some demo videos a governance portal. Is that or similar available to load to our environments. I am aware of the data quality and profiling, but a single view of key indicators would be a...

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ckunal_eng
New Contributor
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@MoJaMa This looks beautiful and insightful.@turagittech We are currently building a governance dashboard separately in Power BI, let me know if you want some KPIs or how to start with that.

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adam_mich
by New Contributor II
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How to Pass Data to a Databricks App?

I am developing a Databricks application using the Streamlit package. I was able to get a "hello world" app deployed successfully, but now I am trying to pass data that exists in the dbfs on the same instance. I try to read a csv saved to the dbfs bu...

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old_student
New Contributor II
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I used Azure Blob Storage, and this resolved the issue. Our app now contains Python files in the Databricks environment app that have access to Azure Blob Storage using Azure credentials.

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Rose_15
by Visitor
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Databricks SQL Warehouse fails when streaming ~53M rows via Python (token/session expiry)

Hello Team,I am facing a consistent issue when streaming a large table (~53 million rows) from a Databricks SQL Warehouse using Python (databricks-sql-connector) with OAuth authentication.I execute a single long-running query and fetch data in batche...

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Sanjeeb2024
Contributor III
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Hi @Rose_15 53M rows via streaming looks big number. What is the use case, if the use case is streaming possibly, you need find a way to extract small batches ( like incremental) and load the data. The use case more look like a batch load. Please pro...

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Punit_Prajapati
by New Contributor III
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Long-lived authentication for Databricks Apps / FastAPI when using Service Principal (IoT use case)

Hi Community,I’m working with Databricks Apps (FastAPI) and invoking the API from external IoT devices.Currently, the recommended approach is to authenticate using a Bearer token generated via a Databricks Apps Service Principal (Client ID + Client S...

Punit_Prajapati_1-1767935971292.png
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rijin-thomas
by New Contributor
  • 184 Views
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Mongo Db connector - Connection timeout when trying to connect to AWS Document DB

I am on Databricks Run Time LTE 14.3 Spark 3.5.0 Scala 2.12 and mongodb-spark-connector_2.12:10.2.0. Trying to connect to Document DB using the connector and all I get is a connection timeout. I tried using PyMongo, which works as expected and I can ...

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Sanjeeb2024
Contributor III
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Hi @rijin-thomas - Can you please allow the CIDR block for databricks account VPC from aws document db sg ( Executor connectivity stated by@bianca_unifeye ) . 

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