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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

amitdatabricksc
by Databricks Partner
  • 9881 Views
  • 2 replies
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AttributeError: 'NoneType' object has no attribute 'repartition'

I am using a framework and i have a query where i am doing,df = seg_df.select(*).write.option("compression", "gzip') and i am getting below error,When i don't do the write.option i am not getting below error. Why is it giving me repartition error. Wh...

  • 9881 Views
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Latest Reply
jose_gonzalez
Databricks Employee
  • 0 kudos

hi @AMIT GADHAVI​ ,could you provide more details? for example, what is your data source? how do you repartition? etc

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eq
by New Contributor III
  • 7284 Views
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Resolved! Multi-task Jobs orchestration - simulating onComplete status

Currently, we are investigating how to effectively incorporate databricks latest feature for orchestration of tasks - Multi-task Jobs.The default behaviour is that a downstream task would not be executed if the previous one has failed for some reason...

  • 7284 Views
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User16844513407
Databricks Employee
  • 7 kudos

Hi @Stefan V​ ,My name is Jan and I'm a product manager working on job orchestration. Thank you for your question. At the moment this is not something directly supported yet, this is however on our radar. If you are interested in having a short conve...

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snoeprol
by New Contributor II
  • 7409 Views
  • 3 replies
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Resolved! Unable to open files with python, but filesystem shows files exist

Dear community,I have the following problem:%fs mv '/FileStore/Tree_point_classification-1.dlpk' '/dbfs/mnt/group22/Tree_point_classification-1.dlpk'I have uploaded a file of a ML-model and have transferred it to the directory with When I now check ...

  • 7409 Views
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Hubert-Dudek
Databricks MVP
  • 2 kudos

There is dbfs:/dbfs/ displayed maybe file is in /dbfs/dbfs directory? Please check it and try to open with open('/dbfs/dbfs. You can also use "data" from left menu to check what is in dbfs file system more easily.

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alonisser
by Contributor II
  • 4327 Views
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Resolved! Accessing confluent schema registry from databricks with scala fails with 401 (just for scala, not python, just in databricks)

Nore, I've tested with the same connection variable:locally with scala - works (via the same prod schema registry)in the cluster with python - worksin the cluster with scala - fails with 401 auth errordef setupSchemaRegistry(schemaRegistryUrl: String...

  • 4327 Views
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Latest Reply
alonisser
Contributor II
  • 1 kudos

Found the issue: it's the uber package mangling some dependency resolving, which I fixedAnother issue, is that currently you can't use 6.* branch of confluent schema registry client in databricks, because the avro version is different then the one su...

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kjoth
by Contributor II
  • 25879 Views
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Resolved! Databricks default python libraries list & version

We are using data-bricks. How do we know the default libraries installed in the databricks & what versions are being installed. I have ran pip list, but couldn't find the pyspark in the returned list.

  • 25879 Views
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Latest Reply
jose_gonzalez
Databricks Employee
  • 5 kudos

Hi @karthick J​ ,If you would like to see all the libraries installed in your cluster and the version, then I will recommend to check the "Environment" tab. In there you will be able to find all the libraries installed in your cluster.Please follow t...

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Erik
by Valued Contributor III
  • 9269 Views
  • 6 replies
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Databricks query performance when filtering on a column correlated to the partition-column

(This is a copy of a question I asked on stackoverflow here, but maybe this community is a better fit for the question):Setting: Delta-lake, Databricks SQL compute used by powerbi. I am wondering about the following scenario: We have a column `timest...

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Latest Reply
Hubert-Dudek
Databricks MVP
  • 7 kudos

In query I would just query first by date (generated from timestamp which we want to query) and than by exact timestamp, so it will use partitioning benefit.

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BradCliQ
by New Contributor II
  • 4747 Views
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Resolved! Clean up of residual AWS resources when deleting a DB workspace

When deleting a workspace from the Databricks Accounts Console, I noticed the AWS resources (VPC, NAT, etc.) are not removed. Should they be? And if not, is there a clean/simple way of cleaning up the residual AWS resources?

  • 4747 Views
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BradCliQ
New Contributor II
  • 2 kudos

Thank you Prabakar - that's what I figured but didn't know if there was documentation on resource cleanup. I'll just go through and find everything the CF stack created and remove them.Regards,Brad

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omsas
by New Contributor
  • 4308 Views
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How to add Columns for Automatic Fill on Pandas Python

1. I have data x,I would like to create a new column with the condition that the value are 1, 2 or 32. The name of the column is SHIFT where this SHIFT column will be filled automatically if the TIME_CREATED column meets the conditions.3. the conditi...

Columns Table Result of tested
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Ryan_Chynoweth
Databricks Employee
  • 0 kudos

You an do something like this in pandas. Note there could be a more performant way to do this too. import pandas as pd import numpy as np   df = pd.DataFrame({'a':[1,2,3,4]}) df.head() > a > 0 1 > 1 2 > 2 3 > 3 4   conditions = [(df['a'] <=2...

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SQLArchitect
by New Contributor
  • 2495 Views
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Writing Records Failing Constraint Requirements to Separate Table when using Delta Live Tables

Are there any plans / capabilities in place or approaches people are using for writing (logging) records failing constraint requirements to separate tables when using Delta Live Tables? Also, are there any plans / capabilities in place or approaches ...

  • 2495 Views
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Latest Reply
Ryan_Chynoweth
Databricks Employee
  • 1 kudos

According to the language reference documentation, I do not believe quarantining records is possible right now out of the box. But there are a few workarounds under the current functionality. Create a second table with the inverse of the expectations...

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Sandesh87
by New Contributor III
  • 4551 Views
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dbutils.secrets.get- NoSuchElementException: None.get

The below code executes a 'get' api method to retrieve objects from s3 and write to the data lake.The problem arises when I use dbutils.secrets.get to get the keys required to establish the connection to s3my_dataframe.rdd.foreachPartition(partition ...

  • 4551 Views
  • 1 replies
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Anonymous
Not applicable
  • 0 kudos

Howdy @Sandesh Puligundla​ - Thank you for your question. Thank you for your patience. I'd like to give this a bit longer to see how the community responds. Hang tight!

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Andyfcx
by Databricks Partner
  • 4206 Views
  • 2 replies
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Resolved! Is it possible to clone a private repository and use it in databricks Repos?

As title, I need to clone code from my private git repo, and use it in my notebook, I do something likedef cmd(command, cwd=None): process = subprocess.Popen(command.split(), stdout=subprocess.PIPE, cwd=cwd) output, error = process.communicate(...

  • 4206 Views
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Latest Reply
Prabakar
Databricks Employee
  • 2 kudos

Hi @Andy Huang​ , Yes, you can do it if it's accessible from Databricks. Please refer to: https://docs.databricks.com/repos.html#repos-for-git-integrationDatabricks does not support private Git servers, such as Git servers behind a VPN.

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Personal1
by New Contributor II
  • 7200 Views
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Resolved! Understanding Partitions in Spark Local Mode

I have few fundamental questions in Spark3 while running a simple Spark app in my local mac machine (with 6 cores in total). Please help.local[*] runs my Spark application in local mode with all the cores present on my mac, correct? It also means tha...

  • 7200 Views
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-werners-
Esteemed Contributor III
  • 2 kudos

That is a lot of questions in one topic.Let's give it a try:[1] this all depends on the values of the concerning parameters and the program you run(think joins, unions, repartition etc)[2] spark.default.parallelism is by default the number of cores *...

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philip
by New Contributor
  • 9806 Views
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Resolved! current date as default in a widget while scheduling the notebook

I have a scheduled a notebook. can I keep current date as default in widget whenever the notebook run and also i need the flexibility to change the widget value to any other date based on the ad hoc run that I do.

  • 9806 Views
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Latest Reply
-werners-
Esteemed Contributor III
  • 3 kudos

So building on the answer of Hubert:from datetime import datedate_for_widget = date.today()So if you use date_for_widget as your default value, you are there.And ofc you can fill this date_for_widget variable with anything you want.You can even fetch...

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Maser_AZ
by New Contributor II
  • 21059 Views
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Resolved! How to fix TypeError: __init__() got an unexpected keyword argument 'max_iter'?

# Create the model using sklearn (don't worry about the parameters for now): model = SGDRegressor(loss='squared_loss', verbose=0, eta0=0.0003, max_iter=3000) Train/fit the model to the train-part of the dataset: odel.fit(X_train, y_train) ERROR: Typ...

  • 21059 Views
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Latest Reply
Fantomas_nl
New Contributor II
  • 1 kudos

Replacing max_iter with n_iter resolves the error. Thnx! It is a bit unusual to expect errors like this with this type of solution from Microsoft. As if it could not be prevented..

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Artem_Y
by Databricks Employee
  • 4427 Views
  • 1 replies
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Show all distinct values per column in dataframe Problem Statement:I want to see all the distinct values per column for my entire table, but a SQL que...

Show all distinct values per column in dataframeProblem Statement:I want to see all the distinct values per column for my entire table, but a SQL query with a collect_set() on every column is not dynamic and too long to write.Use this code to show th...

collect set table
  • 4427 Views
  • 1 replies
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Latest Reply
Anonymous
Not applicable
  • 2 kudos

@Artem Yevtushenko​ - This is great! Thank you for sharing!

  • 2 kudos
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