Ugo Cei wrote:I'm experiencing a memory leak in an application we are currently testing, which uses Flowscript and Woody. Since continuations store a reference to local variables, and the memory leak does not manifest itself if I don't create any continuation, I'm starting to suspect that my usage of form.showForm is causing the leak.What objects are leaked? Did you use Optimizeit or JProfiler to determine this? What does your script look like?
All sorts of objects. My application uses Hibernate to persist objects and retrieve them for editing in a Woody form. Those objects in turn contain references to other persistent and/or transient objects or collections of the same. Some of those references are really to dynamic proxies, since Hibernate uses dynamic proxies for lazy loading.
I am using Optimizeit and it shows lots of objects that are never garbage-collected. The chains of references leading to these objects are rather complex and make debugging the real case very difficult. I will try to prepare a simpler testcase.
If this is indeed the case, how can I make sure that references to local variables will be properly nulled so that they can be garbage collected? Do they get forgotten when a continuation expires?Yes.And what if I invalidate the continuationYes.
Hmmm, from my tests, it looks like doing:
var k = form.showForm(...); k.invalidate();
does not make any difference. But I seem to recall that showForm() creates not one but *two* continuations, so maybe I need to invalidate also the one that is not returned by the function, but how?
I also waited about 10 minutes to see if the expiration of continuations could allow the GC to reclaim some objects, but this did not seem to be the case too.
Thank you,
Ugo
