[FREEMARKER-198] Deadlock occurs during initialization in parallel test environment.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.31
• Fix Version/s: 2.3.32
• Component/s: engine
• Assignee: Dániel Dékány
• Reporter: Tihua Duan
• Created: 12/Oct/21 13:12
• Updated: 16/Jan/23 08:38
• Resolved: 18/Dec/22 16:57

Description

I'm testing freemaker code on two SBT tests, The first code is

val config = new Configuration(Configuration.VERSION_2_3_31)
val d = new DefaultObjectWrapper()
println(d.getJythonSupport)

Another is

val d = new DefaultObjectWrapper()
println(d.getJythonSupport)

When I tested them in parallel, waiting for each other happened.

I speculate that some static initialization code has circular dependencies.
_TemplateAPI.SAFE_OBJECT_WRAPPER-> DefaultObjectWapper.instance->DefaultObjectWrapperConfiguration->_TemplateAPI