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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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Data + AI Summit 2024 - Data Engineering & Streaming

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mvmiller
by • New Contributor III
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Workflow file arrival trigger - does it apply to overwritten files?

I am exploring the use of the "file arrival" trigger for a workflow for a use case I am working on.  I understand from the documentation that it checks every minute for new files in an external location, then initiates the workflow when it detects a ...

Data Engineering
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Rajani
Contributor II
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Hi @mvmiller The  "file arrival" trigger for a workflow considers the name of the file,when the same name file was overwritten the workflow didnt triggerred.hope I answered your question! 

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Brad
by • Contributor II
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One worker is one executor and one physical node

Hi team,Seems in Databricks, instead of like running Spark jobs on a k8s cluster, when a workflow running on a Job Compute/Cluster or instance pool, one physical node can only have one executor. Is this understanding right? If that is true, that mean...

Data Engineering
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-werners-
Esteemed Contributor III
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It can change the number of executors dynamically if I am not mistaken.But maybe Databricks has hammered the 1-1 ratio in stone, something to test I'd say.

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ckough
by • New Contributor III
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Resolved! Cannot sign in at databricks partner-academy portal

Hi thereI have used my company email to register an account for customer-academy.databricks.com a while back. Now what I need to do is create an account with partner-academy.databricks.com using my company email too.However when I register at partner...

Data Engineering
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Sanjanavenkat05
New Contributor II
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I'm also facing the same problem. My company is a databricks partner and I accidentally registered to the customer portal instead of Partner one. Could you please help me to migrate my account to Partner account?I also raised a ticket and the request...

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MartinIsti
by • New Contributor III
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DLT - runtime parameterisation of execution

I have started to use DLT in a prototype framework and I now face the below challenge for which any help would be appreciated.First let me give a brief context:I have metadata sitting in a .json file that I read as the first task and put it into a lo...

Data Engineering
configuration
Delta Live Table
job
parameters
workflow
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data-engineer-d
Contributor
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@Retired_mod Can you please provide some reference to REST API approach? I do not see that available on the docs. TIA

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NagarajuBondala
by • New Contributor II
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AI-Suggested Comments Not Appearing for Delta Live Tables Populated Tables

I'm working with Delta Live Tables (DLT) in Databricks and have noticed that AI-suggested comments for columns are not showing up for tables populated using DLT. Interestingly, this feature works fine for tables that are not populated using DLT. Is t...

Data Engineering
AI
Delta Live Tables
dlt
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shivkumar
by • New Contributor
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how to write data frame API

how to write data frame API

Data Engineering
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lucasrocha
Databricks Employee
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Hello @shivkumar , I hope this message finds you well. I didn't fully understand your question, but to write a DataFrame you can follow the steps in the link below:https://docs.databricks.com/en/getting-started/dataframes.html#tutorial-load-and-trans...

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sahil07
by • New Contributor III
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Resolved! FileNotFoundError while reading PDF file in Databricks from DBFS location

I am trying to read a PDF file from DBFS location in Databricks using PyPDF2.PdfFileReader but it's throwing error that file doesn't existBut the file exists in the path, refer below screenshotCan anyone please suggest what is wrong in this?

sahil07_0-1724773944269.png sahil07_1-1724773977934.png
Data Engineering
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Lucas_TBrabo
Databricks Employee
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@sahil07, It seems that with your current setup, you can't read from DBFS using vanilla Python. I've ran some tests and managed to reproduce the error and solve it by copying the file in DBFS to the local file system of the driver node using dbutils....

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Karl
by • New Contributor II
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DB2 JDBC Connection from Databricks cluster

Has anyone successfully connected to a DB2 database on ZOS from a Databricks cluster using a JDBC connection?I also need to specify an SSL certificate path and not sure if I need to use an init script on the cluster to do so.Any examples would be ver...

Data Engineering
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ahab
by • New Contributor
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Error deploying DLT DAB: Validation failed for cluster_type, the value must be dlt (is "job")

Hello.I'm getting a cluster validation error while trying to deploy a DLT pipeline via DAB.See attached screenshots for config and error.Hoping someone has run into this before and can guide me.Thanks.

Data Engineering
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MohcineRouessi
New Contributor II
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Hey @ahab,Were you able to solve this issue, if yes would you mind sharing your finds If not, looking at your cluster policy, I'm seeing that you are using dlt as the cluster type which is the correct needed type for DLT pipelines, but in the resourc...

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ivanychev
by • Contributor II
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Resolved! Delta table takes too long to write due to S3 full scan

DBR 14.3, Spark 3.5.0. We use AWS Glue Metastore.On August 20th some of our pipelines started timing out during write to a Delta table. We're experiencing many hours of driver executing post commit hooks. We write dataframes to delta with `mode=overw...

Data Engineering
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ivanychev
Contributor II
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spark.databricks.delta.catalog.update.enabled=true setting helped but I still don't understand why the problem started to occur.https://docs.databricks.com/en/archive/external-metastores/external-hive-metastore.html#external-apache-hive-metastore-leg...

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bhakti
by • New Contributor II
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Databricks job getting stuck at saveAsTable

I am trying to write logs to delta table,  but after running for sometime the job is getting stuck at saveAsTable.Traceback (most recent call last):File "/databricks/spark/python/pyspark/errors/exceptions.py", line 228, in decoreturn f(*a, **kw)File ...

Data Engineering
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ivanychev
Contributor II
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Hey @bhakti ! Please provide the full stack trace / error message. Your log doesn't provide any strong clue, the failure during write might occur for various reasons. 

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Amodak91
by • New Contributor II
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Resolved! How to use a Dataframe created in one Notebook from Another, without writing it anywhere ?

I have a large Notebook and want to divide it into multiple Notebooks and use Databricks jobs to run parallelly. However, one of the notebook is using a dataframe from one of the notebooks, so it has to be run downstream of the other ones. Now, since...

Data Engineering
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menotron
Valued Contributor
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Hi @Amodak91, you could use the %run magic command from within the downstream notebook and call the upstream notebook thus having it run in the same context and have all it's variables accessible including the dataframe without needing to persist it....

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JaviPA
by • New Contributor
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Spark Bigquery Connector Availability

Hello,We are trying to use this library (https://github.com/GoogleCloudDataproc/spark-bigquery-connector) to read Bigquery data from a Databricks cluster in Azure, could someone confirm if this library is fully available and supported on Databricks? ...

Data Engineering
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szymon_dybczak
Contributor III
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Hi @JaviPA ,Documentation referes to the library you're going to use:GitHub - GoogleCloudDataproc/spark-bigquery-connector: BigQuery data source for Apache Spark: Read data from BigQuery into DataFrames, write DataFrames into BigQuery tables.Also, it...

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RohitKulkarni
by • Contributor II
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  • 11 replies
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Partially upload data of 1.2GB

Hello Team,I have file contain in txt format of 1.2gb file.I am trying to upload the data into ms sql server database table.Only 10% of the data able to upload it.example :Total records in a file : 51303483Number of records inserted :10224430I am usi...

Data Engineering
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RohitKulkarni
Contributor II
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There was a access lines in the document. Because of this there was partially loading.Thanks for the support 

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ahen
by • New Contributor
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Deployed DABs job via Gitlab CICD. It is creating duplicate jobs.

We had error in DABs deploy and then subsequent retries resulted in a locked stateAnd as suggested in the logs, we use --force-lock option and the deploy succeededHowever, it created duplicate jobs for all assets in the bundle instead of updating the...

Data Engineering
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