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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

laurencewells
by New Contributor III
  • 6897 Views
  • 5 replies
  • 1 kudos

Autoloader and "cleanSource"

Hi All, We are trying to use the Spark 3 structured streaming feature/option ".option('cleanSource','archive')" to archive processed files. This is working as expected using the standard spark implementation, however does not appear to work using aut...

  • 6897 Views
  • 5 replies
  • 1 kudos
Latest Reply
-werners-
Esteemed Contributor III
  • 1 kudos

https://docs.databricks.com/ingestion/auto-loader/options.html#common-auto-loader-optionscleanSource is not a listed option so it won't do anything.Maybe event retention is something you can use?

  • 1 kudos
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RiyazAliM
by Honored Contributor
  • 8710 Views
  • 3 replies
  • 3 kudos

Is there a way to CONCAT two dataframes on either of the axis (row/column) and transpose the dataframe in PySpark?

I'm reshaping my dataframe as per requirement and I came across this situation where I'm concatenating 2 dataframes and then transposing them. I've done this previously using pandas and the syntax for pandas goes as below:import pandas as pd   df1 = ...

  • 8710 Views
  • 3 replies
  • 3 kudos
Latest Reply
RiyazAliM
Honored Contributor
  • 3 kudos

Hi @Kaniz Fatma​ ,I no longer see the answer you've posted, but I see you were suggesting to use `union`. As per my understanding, union are used to stack the dfs one upon another with similar schema / column names.In my situation, I have 2 different...

  • 3 kudos
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Maverick1
by Valued Contributor II
  • 10250 Views
  • 3 replies
  • 6 kudos

Is there any way to overwrite a partition in delta table without specifying each and every partition in replace where? For non dated partitions, this is really a mess with delta tables.

Is there any way to overwrite a partition in delta table without specifying each and every partition in replace where. For non dated partitions, this is really a mess with delta tables.Most of my DE teams don't want to adopt delta because of these gl...

  • 10250 Views
  • 3 replies
  • 6 kudos
Latest Reply
Anonymous
Not applicable
  • 6 kudos

Hi @Saurabh Verma​ following up did you get a chance to check @Hubert Dudek​ previous comments ?

  • 6 kudos
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Anonymous
by Not applicable
  • 2735 Views
  • 1 replies
  • 1 kudos

Query silently failed

Hello all, I'm using the older 6.4 runtime and noticed that a query return no result whereas the same query on 10.4 provided the expected result. This is bad, because I got no error, simply no result at all.Is there is some spark settings on the clus...

  • 2735 Views
  • 1 replies
  • 1 kudos
Latest Reply
Anonymous
Not applicable
  • 1 kudos

Hi @Alessio Palma​ following up did you get chance to check @Kaniz Fatma​ 's previous comments ?

  • 1 kudos
Jack
by New Contributor II
  • 6670 Views
  • 1 replies
  • 1 kudos

Append an empty dataframe to a list of dataframes using for loop in python

I have the following 3 dataframes:I want to append df_forecast to each of df2_CA and df2_USA using a for-loop. However when I run my code, df_forecast is not appending: df2_CA and df2_USA appear exactly as shown above.Here’s the code:df_list=[df2_CA,...

image image
  • 6670 Views
  • 1 replies
  • 1 kudos
Latest Reply
User16764241763
Databricks Employee
  • 1 kudos

@Jack Homareau​  Can you try union functionality with dataframes?https://sparkbyexamples.com/pyspark/pyspark-union-and-unionall/and then try to fill NaNs with the desired values?

  • 1 kudos
VM
by Contributor
  • 6909 Views
  • 4 replies
  • 2 kudos

Error using Synapse ML: JavaPackage object is not callable

I am using DBR version 10.1. I want to use Synapse ML package. I am able to install and import it by following instructions on the link: https://github.com/microsoft/SynapseML. However when I try to run the code it gives me the error shown in the att...

  • 6909 Views
  • 4 replies
  • 2 kudos
Latest Reply
User16764241763
Databricks Employee
  • 2 kudos

Hello @Vikram Mahawal​ Clusters need to be in the running state to install/uninstall the libraries. Could you please start the cluster and try installing it.If you are still stuck, please file a support case with us, so we can take a look.Thanks

  • 2 kudos
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Vadim1
by New Contributor III
  • 4425 Views
  • 3 replies
  • 1 kudos

Resolved! Connect from Databricks to Hbase HDinsight cluster.

Hi, I have Databricks installation in Azure. I want to run a job that connects to HBase in a separate HDinsight cluster.What I tried:Created a peering between base cluster and Databricks vNets.I can ping IPs of Hbase zookeeper nodes but I cannot acce...

  • 4425 Views
  • 3 replies
  • 1 kudos
Latest Reply
User16764241763
Databricks Employee
  • 1 kudos

Vadim, Thank you for the response. Appreciate it.

  • 1 kudos
2 More Replies
lizou
by Contributor III
  • 2419 Views
  • 2 replies
  • 2 kudos

Merge into and data loss

I have a delta table with 20 M rows, Ther table is being updated dozens of times per day. The merge into is used, and the merge works fine for 1 year. But recently I begin notice some of data is deleted from merge into without delete specified. Mer...

  • 2419 Views
  • 2 replies
  • 2 kudos
Latest Reply
lizou
Contributor III
  • 2 kudos

I can't reproduce the issue anymore. for now, I am going to limit the number of merge into commands as intermediate data transformation does not need versioning history. I am going to try to use combined views for each step, and do a one-time merge i...

  • 2 kudos
1 More Replies
shan_chandra
by Databricks Employee
  • 7004 Views
  • 1 replies
  • 1 kudos

Resolved! Insert query fails with error "The query is not executed because it tries to launch ***** tasks in a single stage, while maximum allowed tasks one query can launch is 100000;

Py4JJavaError: An error occurred while calling o236.sql. : org.apache.spark.SparkException: Job aborted. at org.apache.spark.sql.execution.datasources.FileFormatWriter$.write(FileFormatWriter.scala:201) at org.apache.spark.sql.execution.datasources.I...

  • 7004 Views
  • 1 replies
  • 1 kudos
Latest Reply
shan_chandra
Databricks Employee
  • 1 kudos

could you please increase the below config (at the cluster level) to a higher value or set it to zero spark.databricks.queryWatchdog.maxQueryTasks 0The spark config while it alleviates the issue.

  • 1 kudos
PradeepRavi
by New Contributor III
  • 44653 Views
  • 6 replies
  • 10 kudos

How do I prevent _success and _committed files in my write output?

Is there a way to prevent the _success and _committed files in my output. It's a tedious task to navigate to all the partitions and delete the files. Note : Final output is stored in Azure ADLS

  • 44653 Views
  • 6 replies
  • 10 kudos
Latest Reply
shan_chandra
Databricks Employee
  • 10 kudos

Please find the below steps to remove _SUCCESS, _committed and _started files.spark.conf.set("spark.databricks.io.directoryCommit.createSuccessFile","false") to remove success file.run vacuum command multiple times until _committed and _started files...

  • 10 kudos
5 More Replies
auser85
by New Contributor III
  • 4308 Views
  • 3 replies
  • 1 kudos

dbutils.notebook.run() fails with job aborted but running the notebook individually works

I have a notebook that runs many notebooks in order, along the lines of:```%pythonnotebook_list = ['Notebook1', 'Notebook2']   for notebook in notebook_list:  print(f"Now on Notebook: {notebook}")  try:    dbutils.notebook.run(f'{notebook}', 3600)  e...

  • 4308 Views
  • 3 replies
  • 1 kudos
Latest Reply
auser85
New Contributor III
  • 1 kudos

I found the problem. Even if a notebook creates and specifies a widget fully, the notebook run process, e.g, dbutils.notebook.run('notebook') will not know how to use it. If I replace my widget with a non-widget provided value, the process works fine...

  • 1 kudos
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pieseautoford
by New Contributor
  • 909 Views
  • 0 replies
  • 0 kudos

www.pieseford.ro

Hi, my name is Jerry Maguire and I`m automatic engineer at Piese Ford. Piese originale Ford Fiesta 2008-2012

  • 909 Views
  • 0 replies
  • 0 kudos
jwilliam
by Contributor
  • 7081 Views
  • 4 replies
  • 2 kudos

Resolved! How to view the SQL Query History of traditional Databricks cluster (not Databricks SQL)?

I tried use the Spark Cluster UI. But the queries are truncated.

  • 7081 Views
  • 4 replies
  • 2 kudos
Latest Reply
walkermaster12
New Contributor II
  • 2 kudos

In Apache Spark prior to 2.1, once a SQL query was run, there was no way to re-run it; all history was lost. Spark SQL introduced the "replay" functionality in Spark 2.1.0, enabling users to re-run any query they have already run. You can run a query...

  • 2 kudos
3 More Replies
Phani1
by Databricks MVP
  • 4552 Views
  • 2 replies
  • 3 kudos

Resolved! Terminated with exception: Could not initialize class org.rocksdb.Options

Problem Statement : When running Delta Live tables ,it is giving the error.Error Message : Could not initialize class org.rocksdb.Optionsorg.apache.spark.sql.streaming.StreamingQueryException: Query cpicpg_us_tgt_amz_bronze [id = a42eec82-0ee8-41b4-9...

  • 4552 Views
  • 2 replies
  • 3 kudos
Latest Reply
Phani1
Databricks MVP
  • 3 kudos

Hi Team ,Thanks for your response, I faced this issue while executing the Delta Live tables / pipeline.Initially i choose product edition as Core and attached 4 notebooks to the pipeline and each notebook have Bronze and silver tables creation. duri...

  • 3 kudos
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