Too long PortletPreferences XML can cause OutOfMemoryError

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.30 EE GA3, 6.2.10 EE GA1, 7.0.0 M5
• Fix Version/s: 6.1.X EE, 6.2.4 CE GA5, 6.2.X EE, 7.0.0 M5
• Component/s: Performance, Performance > Caching Infrastructure
• Labels:
  • backend_test
  • ee-ts
  • liferay-fixpack-portal-70-6210
  • performance
• Branch Version/s:
  6.2.x, 6.1.x
• Backported to Branch:
  Committed
• Story Points: 3
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/26161

In PortalPreferencesFactoryImpl we use the XML data as the cache key in the cache. In some cases, where for example, there are lots of pages (500+) with Staging and Page Versioning enabled, some portlet preferences could occupy 1MB or more as XML String.

Based on this, in some cases java.lang.OutOfMemoryError can occur while the cache is not full, but there's not enough free memory for the JVM.