Changes to Tomcat classloading order as of Tomcat 8+
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Issue
- In Tomcat 7 and earlier versions, class loading for EXT JAR files were done in alphabetical order. However, with Tomcat 8 and later, class loading has been changed to be decided by the underlying file system.
Environment
- Liferay Portal 6.2
- Tomcat 8+
Resolution
- If the order that EXT plugins and JAR files is affected by this change, it may be necessary to create a custom web classloader for Tomcat 8+ to account for the changes that Tomcat has made in order to deploy the plugins and JAR files in a specific order.
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