[SHINDIG-1132] ClassLoader memory leak caused by XmlUtil ThreadLocal

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0
• Fix Version/s: 1.1-BETA5
• Component/s: Java
• Environment: When trying to unload the ClassLoader that loaded Shindig, for instance in an OSGi environment
• Assignee: Unassigned
• Reporter: Jed Wesley-Smith
• Created: 29/Jul/09 01:03
• Updated: 07/Aug/12 21:47
• Resolved: 16/Nov/09 19:53

Description

The class org.apache.shindig.common.xml.XmlUtil caches a javax.xml.parsers.DocumentBuilder in the ThreadLocal reusableBuilder variable. These instances are created with the static ErrorHandler instance which creates the strong reference to the XmlUtil class that prevents the ClassLoader from being reclaimed.

Currently the only way to turn off this behaviour is for DocumentBuilder.reset() to throw an exception.

We need a way to turn off this caching. Maybe the caching aspect could be injected via Guice?

Issue Links

• relates to: RAVE-750 Memory Leak during redeploy