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Published Sep. 10, 2025

Getting java.lang.StackOverflowError when starting the server after applying patch

Written By

Madhusudan Sharma

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Issue

While performing an upgrade to the Liferay 7.0 environment (applying the patch), the server is not starting and the following error is observed:

SEVERE [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log StandardWrapper.Throwable
java.lang.StackOverflowError
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
at java.lang.ClassLoader.getResource(ClassLoader.java:1096)
at java.lang.ClassLoader.getResource(ClassLoader.java:1091)
at java.lang.ClassLoader.getResource(ClassLoader.java:1091)

Environment

  • Liferay DXP 7.0

Resolution

  • Enable the DEBUG log for 'com.liferay.portal.configuration.easyconf.ClassLoaderAggregateProperties' with the help of the article Adjusting Log Levels to persist after portal restart.
  • Restart the Server.
  • Check if the following or similar DEBUG log traces are observed in the startup logs: 
DEBUG [localhost-startStop-1][ClassLoaderAggregateProperties:94] Adding file file:/liferay/apps/liferay-dxp-digital-enterprise-7.0-sp2/portal-ext.properties
  • If the above traces are observed, remove the include-and-override=${liferay.home}/portal-ext.properties from the portal-ext.properties file and restart the server.
  • The server should start normally.

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