[ODE-574] Memory leak when Un-deploying processes that contain XSL stylesheets

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: BPEL Compilation/Parsing, BPEL Runtime
• Environment: N/A
• Assignee: Unassigned
• Reporter: Ciaran Jessup
• Created: 07/Apr/09 20:48
• Updated: 14/Apr/09 23:37
• Resolved: 14/Apr/09 23:37

Description

Currently if the BPEL process contains any XSL stylesheets it will not free up all the memory that was allocated during the compilation/dehydration of the process. This seems to be because there is a cache of XSLTemplates stored in the XSLTransformHandler, and these XSLTemplates can sometimes contain (transitive) references back to the OProcess object instances (via for example the URIResolvers/XPAth Expressions). Unfortunately this cache lives forever (crucially even after the process has been un-deployed) because of this the object graph hanging from the OProcess object instance is never available for the GC to pick-off.

There is also another reference issue in the ErrorListener that is associated with the XSLTransformHandler instance, but I don't really understand that bit of code just as yet, a patch for the former issue follows, I'm reviewing the ErrorListener issue currently.