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Published Sep. 10, 2025

Upgrade Tool Uses Wrong Version of Tomcat

Written By

Michael Warren Young

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Issue

  • When upgrading to Liferay DXP 7.0 or DXP 7.1 and using the SP1 + Tomcat bundle, the wrong version of Tomcat is suggested by the Upgrade Tool
  • For 7.1 the bundle includes Tomcat 9.0.6, but the Upgrade Tool is configured to recommend version 9.0.10
  • For 7.0 the bundle includes Tomcat 8.0.53. Also a "/tools/" is added at the end of the path.
  • If the user uses the suggested version and path, the upgrade will fail with this error: 
    Exception in thread "main" java.lang.ClassNotFoundException: com.liferay.portal.tools.DBUpgrader 

    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 

    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 

    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 

    at com.liferay.portal.tools.db.upgrade.client.DBUpgraderLauncher.main(DBUpgraderLauncher.java:43)

Environment

  • Upgrade tool 2.0.1
  • Liferay DXP 7.0 on a Tomcat Bundle
  • Liferay DXP 7.1 SP1 + Tomcat Bundle
  • 2023.Q3.1 bundle with the upgrade tool has a similar behavior

Resolution

There are three possible solutions:

  1. When prompted to select the Application Server directory by the Upgrade tool, specify tomcat-9.0.6 or tomcat-8.0.53, instead of using the suggested tomcat 9.0.10.
  2. Also check the paths automatically created and remove the "/tool/" part both on the app-server.properties and the portal-upgrade-ext.properties
  3. For 7.1 the issue will be resolved with the SP2 + Tomcat bundle. Use the Liferay DXP 7.1 GA1 + Tomcat bundle to upgrade and install the latest fix pack.
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