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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

Forum Posts

Pavani22
by New Contributor
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Registered for Wrong certification

Hi, I am registered for databricks certification today at 23:00hr and I accidentally choose databricks data analyst certification instead of databricks data engineer associate.I have left several mails and submitted several forms to be able to fix th...

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naveenprasanth
by New Contributor
  • 1937 Views
  • 1 replies
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Issue with Reading MongoDB Data in Unity Catalog Cluster

I am encountering an issue while trying to read data from MongoDB in a Unity Catalog Cluster using PySpark. I have shared my code below: from pyspark.sql import SparkSession database = "cloud" collection = "data" Scope = "XXXXXXXX" Key = "XXXXXX-YYY...

Data Engineering
mongodb
spark config
Spark Connector package
Unity Catalog
  • 1937 Views
  • 1 replies
  • 1 kudos
Latest Reply
Wojciech_BUK
Valued Contributor III
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Few points 1. chce if you installed exactly same driver version as you are pointing this in code (2.12:3.2.0) it has to match 100percentorg.mongodb.spark:mongo-spark-connector_2.12:3.2.02. I have seen people configuring  connction to atlas in two way...

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Learnit
by New Contributor II
  • 1835 Views
  • 1 replies
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Unable to locate "Configure databricks" in visual studio code

Need help in locating "configure databricks" option to connect to a cluster in visual studio code. Not sure which settings need to enabled to view/access the configuration. Below is the screen shot of it.

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Learnit
New Contributor II
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NivRen
by New Contributor
  • 1346 Views
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Dashboard HTML Export: DisplayHTML Formatting Lost

I am building an analytics dashboard that we plan to export into HTML to provide to clients. We are running into major issues specifically with DisplayHTML visualizations. We are using DisplayHTML for help text, sub-headings, and for a KPI banner at ...

Data Engineering
dashboard
DisplayHTML
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dzmitry_tt
by New Contributor
  • 2307 Views
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DeltaRuntimeException: Keeping the source of the MERGE statement materialized has failed repeatedly.

I'm using Autoloader (in Azure Databricks) to read parquet files and write their data into the Delta table.schemaEvolutionMode is set to 'rescue'.In foreach_batch I do1) Transform of read dataframe;2) Create temp view based on read dataframe and merg...

Data Engineering
autoloader
MERGE
streaming
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Wojciech_BUK
Valued Contributor III
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Hmm, you can't have duplicated data in source dataframe/batch but it should error out with diffrent erro like "Cannot perform Merge as multiple source rows matched and attempted to modify the same target row...".Also this behaviour after rerun is str...

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EDDatabricks
by Contributor
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Slow stream static join in Spark Structured Streaming

SituationRecords are streamed from an input Delta table via a Spark Structured Streaming job. The streaming job performs the following.Read from input Delta table (readStream)Static join on small JSONStatic join on big Delta tableWrite to three Delta...

EDDatabricks_1-1703760391974.png
Data Engineering
Azure Databricks
optimization
Spark Structured Streaming
Stream static join
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Wojciech_BUK
Valued Contributor III
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You have quite small machines that you are using, please take into consideration that a lot of memory of machine is occupied by other processes https://kb.databricks.com/clusters/spark-shows-less-memoryThis is not good idea to broadcast huge data fra...

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Erik
by Valued Contributor III
  • 10864 Views
  • 4 replies
  • 3 kudos

Resolved! How to run code-formating on the notebooks

Has anyone found a nice way to run code-formating (like black) on the notebooks **in the workspace**? My current workflow is to commit the file, pull it locally, format, repush and pull. It would be nice if it was some relatively easy way to run blac...

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Latest Reply
MartinPlay01
New Contributor II
  • 3 kudos

Hi Erik,I don't know if you are aware of this feature, currently there is an option to format the code in your databricks notebooks using the black code style formatter.Just you need to either have a version of your DBR equal to or greater than 11.2 ...

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XClar_40456
by New Contributor
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  • 2 replies
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Resolved! Are there system tables that are customer accessible for setting up job run health monitoring in GCP Databricks?

Is Overwatch still an active project, is there anything equivalent for GCP Databricks or any plans for Overwatch to be available in GCP? 

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Latest Reply
SriramMohanty
Databricks Employee
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Yes overwatch supports GCP.

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rt-slowth
by Contributor
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Help design my streaming pipeline

###Data Source- AWS RDS- Database migration tasks have been created using AWS DMS- Relevant cdc information is being stored in a specific bucket in S3### Data frequency- Once a day (but not sure when, sometime after 6pm)### Development environment- d...

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RabahO
by New Contributor III
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Handling data close to SCD2 with Delta tables

Hello, stack used: pyspark and delta tablesI'm working with some data that look a bit like SCD2 data.Basically, the data has columns that represent an id, a rank column and other informations, here's an example:login, email, business_timestamp => the...

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Wojciech_BUK
Valued Contributor III
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Your problem is exactly like SCD2 . You just add one more column with valid to date ( optionals you can add flag is actual to tag current records)You can use DLT apply changes syntax. Alternatively Merge statement .On the top of that table you can bu...

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lorenz
by New Contributor III
  • 7955 Views
  • 3 replies
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Resolved! Databricks approaches to CDC

I'm interested in learning more about Change Data Capture (CDC) approaches with Databricks. Can anyone provide insights on the best practices and recommendations for utilizing CDC effectively in Databricks? Are there any specific connectors or tools ...

  • 7955 Views
  • 3 replies
  • 1 kudos
Latest Reply
jcozar
Contributor
  • 1 kudos

Hi, first of all thank you all in advance! I am very interested on this topic!My question is beyond what it is described here. As well as @Pektas , I am using debezium to send data from Postgres to a Kafka topic (in fact, Azure EventHub). My question...

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Aidin
by New Contributor II
  • 4939 Views
  • 4 replies
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BINARY data type

Hello everyone.I'm trying to understand how BINARY data type works in spark sql. According to examples in the documentation, using cast or literal 'X' should return HEX representation of the binary data type, but when I try the same code, I see base6...

Screenshot 2023-12-22 at 19.55.15.png
  • 4939 Views
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Latest Reply
Wojciech_BUK
Valued Contributor III
  • 0 kudos

If you are confused , please look at this thread, they explain that Databricks use base64 as binary default. This is not documented but can be tracked at source code level.https://stackoverflow.com/questions/75753311/not-getting-binary-value-in-datab...

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sahesh1320
by New Contributor
  • 669 Views
  • 1 replies
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Shutdown Cluster in script if there is any failure

I am working on incremental load from sql server to Delta lake tables stored in ADLS gen2. DUring the script i need to qrite a logic toShut down the DB cluster on failure (there needs to be logging added to ensure that shutdown happens promptly to pr...

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Latest Reply
Wojciech_BUK
Valued Contributor III
  • 0 kudos

If you run your notebook via workflow and error happen and there are no retires on job, then job cluster will be terminated immidietly after failure.You can add python block of try catch and if error occurs , you catch the error and log somewhere bef...

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