Submit Feedback
Legacy Knowledge Base
Published Sep. 10, 2025

ClassCastException When Adding Web Content in Batch via Headless API

Written By

Madhusudan Sharma

How To articles are not official guidelines or officially supported documentation. They are community-contributed content and may not always reflect the latest updates to Liferay DXP. We welcome your feedback to improve How To articles!

While we make every effort to ensure this Knowledge Base is accurate, it may not always reflect the most recent updates or official guidelines.We appreciate your understanding and encourage you to reach out with any feedback or concerns.

Legacy Article

You are viewing an article from our legacy "FastTrack" publication program, made available for informational purposes. Articles in this program were published without a requirement for independent editing or verification and are provided"as is" without guarantee.

Before using any information from this article, independently verify its suitability for your situation and project.

Issue

  • When attempting to add web content in batch using the headless API endpoint /o/headless-delivery/v1.0/sites/{siteId}/structured-contents/batch, a ClassCastException occurs. The error resembles the following:
ERROR [default-2][BatchEngineImportTaskExecutorImpl:155] Unable to update batch engine import task
java.lang.RuntimeException: java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class com.liferay.headless.delivery.dto.v1_0.ContentFieldValue (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; com.liferay.headless.delivery.dto.v1_0.ContentFieldValue is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @6ee031b1)
...Caused by: java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class com.liferay.headless.delivery.dto.v1_0.ContentFieldValue (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; com.liferay.headless.delivery.dto.v1_0.ContentFieldValue is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @6ee031b1)

  • However, if the individual endpoint /o/headless-delivery/v1.0/sites/{siteId}/structured-contents is hit, it works without any errors.

Environment

  • DXP 2024.Q3.12

Resolution

  • This is a known bug that has been addressed by LPD-48903

Additional Information

  • If a hotfix is required, please create a support ticket requesting the hotfix by attaching the patch details.
  • The following articles will guide you to install the Fixpack/Hotfix in your environment: 
Did this article resolve your issue ?
Legacy Knowledge Base
Did this article resolve your issue ?