topic Re: cluster and workflow issue in Get Started Discussions

cluster and workflow issue

Ved88 — Tue, 10 Feb 2026 07:43:26 GMT

com.databricks:spark-xml_2.12:0.18.0
com.crealytics:spark-excel_2.12:3.4.3_0.20.4 in prerequisites_maven.yml and i created cluster and ran from this updated cluster notebook running but jobs failing

UnknownException: (java.util.ServiceConfigurationError) org.apache.spark.sql.sources.DataSourceRegister: com.databricks.spark.xml.DefaultSource Unable to get public no-arg constructor

Re: cluster and workflow issue

bianca_unifeye — Tue, 10 Feb 2026 12:00:18 GMT

This is a classpath mismatch between the interactive cluster and the Workflow job cluster.

What I believe happened: the notebook was running on an all-purpose cluster with the Maven libraries attached, but the job was using a separate job cluster that did not have (or had conflicting versions of) spark-xml.

Fix

Add the Maven libraries directly to the Workflow job cluster (or job YAML), not just the interactive cluster:
- com.databricks:spark-xml_2.12:0.18.0
- com.crealytics:spark-excel_2.12:3.4.3_0.20.4
Ensure there are no duplicate or conflicting spark-xml jars
Confirm the same DBR/Spark version is used for both notebook and job

Re: cluster and workflow issue

youssefmrini — Thu, 12 Feb 2026 16:23:33 GMT

You can now natively read Excel files https://docs.databricks.com/aws/en/query/formats/excel