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From "BELUGA BEHR (JIRA)" <j...@apache.org>
Subject [jira] [Created] (VFS-480) [VFS] SoftRefFilesCache Doesn't Ever Clear Cache
Date Wed, 24 Jul 2013 01:25:47 GMT
BELUGA BEHR created VFS-480:
-------------------------------

             Summary: [VFS] SoftRefFilesCache Doesn't Ever Clear Cache
                 Key: VFS-480
                 URL: https://issues.apache.org/jira/browse/VFS-480
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 2.0
            Reporter: BELUGA BEHR
            Priority: Critical
         Attachments: AtomicRefThreadTest.java

The SoftRefFilesCache doesn't ever clear its cache.  I found this out when I notice my JVM
was sucking up hundreds of megs as it load, processed, and unloaded, thousands of files.

I have attached an example program that demonstrates the problem with SoftRefFilesCache.java#startThread().
 The thread is never actually launched.  I have only tried it on Java 1.7.   Basically, I
am trying to demonstrate that calling AtomicReference#compareAndSet never returns true when
"expected" is a null value.  So what happens is that the call returns false, the loop is re-entered,
newThread gets blown away, the thread is found, and the loop exits, so the thread is never
launched.  I'm using VFS in a singleton fashion.  Well, I was using it before this issue.

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