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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

sahil3
by New Contributor
  • 896 Views
  • 1 replies
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NOT ABLE TO ATTACH CLUSTRE

notebook detached-exception when creating execution context:java.until.concurrent.timeoutexceoption:timed out after 15 seconds

  • 896 Views
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Latest Reply
RiyazAliM
Honored Contributor
  • 0 kudos

Hey @sahil3 Try detach and re-attaching the notebook to the notebook. Please note that this will clear the state of the notebook.if the issue persists, try restarting the cluster.Best,

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rak_haq
by New Contributor III
  • 2753 Views
  • 3 replies
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Resolved! How to use read_kafka() SQL with secret()?

Hi,I want to read data from the Azure Event Hub using SQL.Can someone please give me an executable example where you can also use the connection string from the event hub using the SQL function secret(), for example?This is what i tried but it Databr...

Data Engineering
azure
event_hub
kafka
sql
streaming
  • 2753 Views
  • 3 replies
  • 1 kudos
Latest Reply
rak_haq
New Contributor III
  • 1 kudos

I found the solution und could successfully establish a connection to Event-Hub.  SELECT cast(value as STRING) as raw_json, current_timestamp() as processing_time FROM read_kafka( bootstrapServers => '<YOUR EVENT-HUB NAMESPACE>.servicebus.windows.n...

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Ajay-Pandey
by Databricks MVP
  • 5845 Views
  • 5 replies
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On-behalf-of token creation for service principals is not enabled for this workspace

Hi AllI just wanted to create PAT for Databricks Service Principle but getting below code while hitting API or using CLI - Please help me to create PAT for the same.#dataengineering #databricks

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Data Engineering
community
Databricks
  • 5845 Views
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Latest Reply
JackB
New Contributor II
  • 0 kudos

You can generate the token while logged in as the Service Principle via the Azure CLI in a Command Prompt window.  To do so, make sure to install the Azure CLI and the Databricks CLI with it.Install the Azure CLI for Windows | Microsoft LearnInstall ...

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Harrison
by New Contributor II
  • 2765 Views
  • 1 replies
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Reading CloudWatch Logs from AWS Kinesis

If you have AWS CloudWatch subscribed to write out logs to AWS Kinesis, the Kinesis stream is base64 encoded and the CloudWatch logs are GZIP compressed. The challenge we faced was how to address that in pyspark to be able to read the data.  We were ...

  • 2765 Views
  • 1 replies
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oblikas
New Contributor II
  • 0 kudos

Thank you so much, this is very helpful

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BF7
by Contributor
  • 3088 Views
  • 3 replies
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Resolved! What is the difference between spark inferschema and cloudFiles.inferColumnTypes?

We have been using spark.read with inferSchema = True to validate AutoLoader schema inferencing. But I have a suspicion that they do these differently from each other and may not always yield the identical results.Has anyone ever answered this questi...

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lingareddy_Alva
Esteemed Contributor
  • 3 kudos

Hi @BF7 Yes — there is a difference between how spark.read(...).option("inferSchema", "true")and Auto Loader's schema inference (cloudFiles.schemaHints, cloudFiles.inferColumnTypes, etc.) work.They are not guaranteed to produce identical results,Key ...

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Unimog
by New Contributor III
  • 2117 Views
  • 3 replies
  • 1 kudos

Resolved! springml sftp with spark 3.x

Is there a version of springml spark-sftp that works with spark 3.x and scala 2.12?  If so can you point me to it or how to load it in my compute?

  • 2117 Views
  • 3 replies
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Latest Reply
Louis_Frolio
Databricks Employee
  • 1 kudos

For Python you might want to look at Paramiko, it seems that it might be an option.  You could also look at ETL tools like Airbyte, Rivery, CData, etc.

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ÓscarHernández
by New Contributor II
  • 9661 Views
  • 3 replies
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SQLSTATE: XX000 The Spark SQL phase planning failed with an internal error.

Hello everyone,I am currently working with a SQL Warehouse and have been getting the following error message:[INTERNAL_ERROR ] The Spark SQL phase planning failed with an internal error. You hit a bug in Spark or the Spark plugins you use. Please, re...

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ÓscarHernández
New Contributor II
  • 0 kudos

I have tried to simplify the query as much as possible to see if that helps but the bug still persists. The problem should be something with the way Databricks treats columns passed as arguments for a function.I tried these queries:select * FROM VALU...

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minhhung0507
by Valued Contributor
  • 12323 Views
  • 15 replies
  • 3 kudos

API for Restarting Individual Failed Tasks within a Job?

Hi everyone,I'm exploring ways to streamline my workflow in Databricks and could really use some expert advice. In my current setup, I have a job (named job_silver) with multiple tasks (e.g., task 1, task 2, task 3). When one of these tasks fails—say...

  • 12323 Views
  • 15 replies
  • 3 kudos
Latest Reply
RiyazAliM
Honored Contributor
  • 3 kudos

Hey @minhhung0507 - quick question - what is the cluster type you're using to run your workflow?I'm using a shared, interactive cluster, so I'm passing the parameter {'existing_cluster_id' : task['existing_cluster_id']}in the payload. This parameter ...

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smpa01
by Contributor
  • 2451 Views
  • 4 replies
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Resolved! Debugging jobs/run-now endpoint

I am not being able to run jobs/runnow endpoint. I am getting an error asError fetching files: 403 - {"error_code":"PERMISSION_DENIED","message":"User xxxx-dxxxx-xxx-xxxx does not have Manage Run or Owner or Admin permissions on job 437174060919465",...

smpa01_0-1744904979789.png smpa01_1-1744905123010.png
  • 2451 Views
  • 4 replies
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Latest Reply
RiyazAliM
Honored Contributor
  • 0 kudos

Hi @smpa01 - The PAT you're using belongs to Service Principal or your personal token? If SP, it should have permissions to run the DBX workflow. Let me know if any questions.

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21f3001806
by New Contributor III
  • 3409 Views
  • 5 replies
  • 5 kudos

Resolved! Dlt pipeline showing legacy , even though all things are latest

Some of old dlt pipelines in my databricks workspace are showing legacy,I am using serverless pipeline with mode - preview.Anything which I missed ?

  • 3409 Views
  • 5 replies
  • 5 kudos
Latest Reply
RiyazAliM
Honored Contributor
  • 5 kudos

@ashraf1395 - I understand now, let me try it once.

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4 More Replies
daan_dw
by New Contributor III
  • 1147 Views
  • 1 replies
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Writing files using multithreading to dbfs

Hello,I am reading in xml files from AWS S3 and storing them on dbfs:/ using multithreaded code. The code itself seems to be fine as for the first +- 100 000 files it works without issues and I can see the data arriving on DBFS.However it will always...

Screenshot 2025-04-11 at 16.14.04.png
  • 1147 Views
  • 1 replies
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Latest Reply
SP_6721
Honored Contributor II
  • 0 kudos

Hi @daan_dw I think this issue mainly comes from using multithreading to handle XML files while interacting with both S3 and DBFS. When the thread count gets too high, it likely causes race conditions.To avoid this:Try reducing the number of threads....

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Yuki
by Contributor
  • 2335 Views
  • 2 replies
  • 2 kudos

Resolved! How do you think continuing to use instance profile to S3 multi part upload?

My team is currently using an instance profile to upload data to S3 since we only have Hive Metastore.I like Unity Catalog a lot, but my code uses multipart upload to S3 for efficiency.https://docs.aws.amazon.com/AmazonS3/latest/userguide/mpuoverview...

  • 2335 Views
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Latest Reply
Yuki
Contributor
  • 2 kudos

Hi @lingareddy_Alva ,Thank you for your excellent response. I really appreciated it.I couldn't find the mention that says "Instance profiles are still supported but should be used for specific, advanced access cases." I will use it for now, recognizi...

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zmsoft
by Contributor
  • 2208 Views
  • 3 replies
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How to set DLT pipeline warning alert?

Hi there,The example description of custom event hooks in the documentation is not clear enough, I do not know how to implement it inside python functions. event-hooks  My Code: %python # Read the insertion of data raw_user_delta_streaming=spark.rea...

  • 2208 Views
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Latest Reply
Priyanka_Biswas
Databricks Employee
  • 0 kudos

Hi @zmsoft  The event hook provided, user_event_hook, must be a Python callable that accepts exactly one parameter - a dictionary representation of the event that triggered the execution of this event hook. The return value of the event hook has no s...

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NamNguyenCypher
by New Contributor II
  • 2218 Views
  • 2 replies
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Resolved! Adding column masks to a column using the DLT Python create_streaming_table API

I'm having difficulty adding a mask function to columns while creating streaming tables using the DLT Python method create_streaming_table() like this but it does not work, the streaming table is created but no column is masked:def prepare_column_pro...

  • 2218 Views
  • 2 replies
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Latest Reply
lingareddy_Alva
Esteemed Contributor
  • 2 kudos

@NamNguyenCypher Delta Live Tables’ Python API does not currently honor column-mask metadata embedded in a PySpark StructType. Masking (and row filters) on DLT tables are only applied when you define your table with a DDL-style schema that includes a...

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vziog
by New Contributor III
  • 2505 Views
  • 5 replies
  • 1 kudos

Unexpected SKU Names in Usage Table for Job Cost Calculation

I'm trying to calculate the cost of a job using the usage and list_prices system tables, but I'm encountering some unexpected behavior that I can't explain.When I run a job using a shared cluster, the sku_name in the usage table is PREMIUM_JOBS_SERVE...

  • 2505 Views
  • 5 replies
  • 1 kudos
Latest Reply
vziog
New Contributor III
  • 1 kudos

Thank you all for your replies. @lingareddy_Alva what about @Walter_C and @mnorland mentioned about enabling serverless tasks. Is this possible and how?

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