- 34 Views
- 2 replies
- 0 kudos
DLT Pipeline Stopped working
Hello, Suddenly our DLT pipelines we're getting failures saying thatLookupError: Traceback (most recent call last): result_df = result_df.withColumn("input_file_path", col("_metadata.file_path")).withColumn( ...
- 34 Views
- 2 replies
- 0 kudos
- 0 kudos
May be there is internally some updates from databricks Can Check and Switch Your Pipeline Channel, In the DLT pipeline settings (under Advanced > Channel), confirm if it's set to "Preview". Switch to "Current" for a more stable engine version, then...
- 0 kudos
- 23 Views
- 0 replies
- 0 kudos
Cannot import pyspark.pipelines module
Question: What could be a cause of the following error of my code in a Databricks notebook, and how can we fix the error? I'm using latest Free Edition of Databricks that has runtime version 17.2 and PySpark version 4.0.0.Error:ImportError: cannot im...
- 23 Views
- 0 replies
- 0 kudos
- 62 Views
- 4 replies
- 0 kudos
Resolved! Can't enable "variantType-preview" using DLTs
Using create_streaming_table and passing table properties as follows, I get an error running the pipeline for the first time:> Your table schema requires manually enablement of the following table feature(s): variantType-preview.I'm using this code:c...
- 62 Views
- 4 replies
- 0 kudos
- 0 kudos
There's a workaround available in most situations which is to first create the table without the VARIANT column, run the pipeline at least once, and then add the column in a subsequent refresh.
- 0 kudos
- 28 Views
- 0 replies
- 0 kudos
Results from the spark application to driver
I tried to read many articles but still not clear on this:The executors complete the execution of tasks and have the results with them.1. The results(output data) from all executors is transported to driver in all cases or executors persist it if tha...
- 28 Views
- 0 replies
- 0 kudos
- 2435 Views
- 1 replies
- 1 kudos
Databricks APP OBO User Authorization
Hi All,We are using on-behalf of user authorization method for our app and the x-forwarded-access-token is expiring after sometime and we have to redeploy our app to rectify the issue. I am not sure what is the issue or how we can keep the token aliv...
- 2435 Views
- 1 replies
- 1 kudos
- 1 kudos
Hi @Upendra_Dwivedi , are you still facing this issue? The x-forwarded-access-token your app receives is the current user’s access token that Databricks forwards in HTTP headers for on‑behalf‑of‑user access. You should read it from the request on eac...
- 1 kudos
- 162 Views
- 3 replies
- 2 kudos
Resolved! Liquid Clustering With Merge
Hello I’m facing severe performance issues with a merge into databricksmerge_condition = """ source.data_hierarchy = target.data_hierarchy AND source.sensor_id = target.sensor_id AND source.timestamp = target.timestamp """The target Delt...
- 162 Views
- 3 replies
- 2 kudos
- 303 Views
- 8 replies
- 3 kudos
DLT pipeline fails with “can not infer schema from empty dataset” — works fine when run manually
Hi everyone,I’m running into an issue with a Delta Live Tables (DLT) pipeline that processes a few transformation layers (raw → intermediate → primary → feature).When I trigger the entire pipeline, it fails with the following error:can not infer sche...
- 303 Views
- 8 replies
- 3 kudos
- 3 kudos
@databricksero Explicit Schema Definition: When calling spark.createDataFrame(pdf_cleaned), explicitly provide the schema even if the DataFrame is empty. This helps Spark infer the types and prevents the “cannot infer schema from empty dataset” erro...
- 3 kudos
- 11253 Views
- 1 replies
- 0 kudos
py4j.protocol.Py4JJavaError: An error occurred while calling o359.sql. : java.util.NoSuchElementExce
Hi!We are creating table in streaming job every micro-batch using spark.sql('create or replace table ... using delta as ...') command. This query includes combining data from multiple tables.Sometimes our job fails with error:py4j.Py4JException: An e...
- 11253 Views
- 1 replies
- 0 kudos
- 0 kudos
Hi @deng_dev ,Did you discover any way to raise this error gracefully? I'm facing the same error when running the kinesis stream. Although I'm aware of what the error is but my intent is to raise and log the error gracefully
- 0 kudos
- 126 Views
- 1 replies
- 4 kudos
I Tried Teaching Databricks About Itself — Here’s What Happened
Hi All, How are you doing today?I wanted to share something interesting from my recent Databricks work — I’ve been playing around with an idea I call “Real-Time Metadata Intelligence.” Most of us focus on optimizing data pipelines, query performance,...
- 126 Views
- 1 replies
- 4 kudos
- 4 kudos
I like the core idea. You are mining signals the platform already emits.I would start rules first, track small files ratio and average file size trend, watch skew per partition and shuffle bytes per input gigabyte. Compare job time to input size to c...
- 4 kudos
- 63 Views
- 1 replies
- 1 kudos
Learning Path for Spark Developer Associate
Hello Everyone,Happy for being a part of Virtual Journey !!Enrolled in Associate Spark Developer and completed learning path in Databricks Academy. Can anyone please confirm is completing learning path enough for obtaining 50% off voucher for certifi...
- 63 Views
- 1 replies
- 1 kudos
- 1 kudos
Hello @Bhavana_Y! To be eligible for the incentives, you’ll need to complete one of the pathways mentioned in the Learning Festival post. Based on your screenshot, it looks like you’ve completed all four modules of LEARNING PATHWAY 7: APACHE SPARK DE...
- 1 kudos
- 158 Views
- 4 replies
- 3 kudos
Resolved! deadlock occurs with use statement
When issuing a query from Informatica using a Delta connection, the statement use catalog_name.schema_name is executed first. At that time, the following error appeared in the query history:Query could not be scheduled: (conn=5073499)Deadlock found w...
- 158 Views
- 4 replies
- 3 kudos
- 3 kudos
I’ll try making adjustments on the Informatica side.Thank you for your help.
- 3 kudos
- 188 Views
- 4 replies
- 6 kudos
Slow PySpark operations after long DAG that contains many joins and transformations
We are using PySpark and notice that when we are doing many transformations/aggregations/joins of the data then at some point the execution time of simple task (count, display, union of 2 tables, ...) become very slow even if we have a small data (ex...
- 188 Views
- 4 replies
- 6 kudos
- 6 kudos
This is a pretty common issue with PySpark when working on large DAGs with lots of joins and transformations. As the DAG grows, Spark has to maintain a huge execution plan, and performance can drop due to shuffling, serialization, and memory overhead...
- 6 kudos
- 630 Views
- 8 replies
- 5 kudos
DAB + DLT destroy fails due to ownership/permissions mismatch
Hi all,We are running into an issue with Databricks Asset Bundles (DAB) when trying to destroy a DLT pipeline. Setup is as follows:Two separate service principals:Deployment SP: used by Azure DevOps for deploying bundles.Run_as SP: used for running t...
- 630 Views
- 8 replies
- 5 kudos
- 5 kudos
We just released https://github.com/databricks/cli/releases/tag/v0.273.0 with a mitigation for this, the error should disappear if you upgrade. Please try and let us know how it goes. Terraform fix is in https://github.com/databricks/terraform-provid...
- 5 kudos
- 40 Views
- 1 replies
- 0 kudos
Serverless - can't parallelize UDF in applyInPandas
HI allServerless V3 solved an error of mismatching python versions between driver and worker which I had on V2 (can't remember the exact wording).So I'd been running this on classic compute so far.Today I tried on serverless to a partial success - un...
- 40 Views
- 1 replies
- 0 kudos
- 0 kudos
I was wrong in interpreting the results. threading.get_native_id() does not work on serverless as on classic, so different threads return the same ID. The time it takes to execute the test is obviously less than 40 seconds, if it was running on a sin...
- 0 kudos
- 115 Views
- 2 replies
- 1 kudos
Spark Streaming Loading 1kto 5k rows only delta table
Hi Team,I have 4-5 millions of files in s3 files around 1.5gb data only with 9 million records, when i try to use autoloader to read the data using read stream and writing to delta table the processing is taking too much time, it is loading from 1k t...
- 115 Views
- 2 replies
- 1 kudos
- 1 kudos
@bunny1174 It is a common issue that small files gets created during streaming. Since you are using delta file format, I would suggest two solutions,1. try using Liquid clustering. This does auto compact of small files into a bigger chuck mostly of 1...
- 1 kudos
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