[OPENEJB-2070] Potential deadlock in URLClassLoaderFirst

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.6.0
• Fix Version/s: 4.7.0
• Component/s: container system
• Environment: NA
• Assignee: Andy Gumbrecht
• Reporter: Andy Gumbrecht
• Created: 06/Feb/14 16:04
• Updated: 02/Jul/14 17:44
• Resolved: 03/Jun/14 07:58

Description

Calling org.apache.openejb.util.classloader.URLClassLoaderFirst#loadClass from one thread may cause a deadlock if Class.forName is called from another thread, as this internally calls ClassLoader.getCallerClassLoader() - Which may be the same URLClassLoaderFirst instance.

Adding an ReentrantLock should be a viable solution.