Submit Feedback
Legacy Knowledge Base
Published Sep. 10, 2025

ClassCastException during upgrade when setting maximum file size using config file

Written By

Marco Abamonga

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

  • During the upgrade process from Liferay DXP 7.2 to 2025.Q1, a ClassCastException occurs when setting the maximum file size using the OSGi configuration file com.liferay.document.library.configuration.DLConfiguration.config. The error message indicates that a string value cannot be cast to a long value, specifically for the fileMaxSize property: 
    2025-04-23 18:16:43.737 ERROR [main][UpgradeExecutor:333] Failed upgrade process for module com.liferay.document.library.service com.liferay.portal.kernel.upgrade.UpgradeException: java.lang.ClassCastException: class java.lang.String cannot be cast to class java.lang.Long (java.lang.String and java.lang.Long are in module java.base of loader 'bootstrap')

Environment

  • Liferay DXP 7.2
  • Liferay DXP 2025.Q1 (Quarterly Release)
  • MySQL

Resolution

  • This issue appears related to changes in LPS-125016 and LPS-135504. To resolve this, set the maximum file size through the Control Panel instead of using the configuration file. Go to Control Panel > System Settings > Documents and Media and update the value there. This method ensures the value is stored correctly in the database, allowing the upgrade to proceed without errors. The updated maximum file size will then be correctly reflected in the upgraded 2025.Q1 system.
Did this article resolve your issue ?
Legacy Knowledge Base
Did this article resolve your issue ?