potential memory leak when using ThreadSafeClientConnManager
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                 Key: HTTPCLIENT-841
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-841
             Project: HttpComponents HttpClient
          Issue Type: Bug
          Components: HttpClient
    Affects Versions: 4.0 Beta 2
         Environment: Leopard 10.5.6, Java 1.5.0_16, Jetty 6.1.7
            Reporter: Ted Slusser


When using ThreadSafeClientConnManager and developing with Jetty using auto-redeploy feature eventually I run into a PermGen out of memory exception.  I investigated with YourKit 8.0.6 and found a class loader circular reference in RefQueueWorker.  Not really sure what I was doing I made the refQueueHandler non-final and nulled it in the shutdown method of RedQueueWorker.  I don't seem to have the problem any longer with circular class loader references.

Here is a diff from 4.0-beta2


--- httpclient/src/main/java/org/apache/http/impl/conn/tsccm/RefQueueWorker.jav(revision 763223)
+++ httpclient/src/main/java/org/apache/http/impl/conn/tsccm/RefQueueWorker.jav(working copy)
@@ -50,7 +50,7 @@
     protected final ReferenceQueue<?> refQueue;

     /** The handler for the references found. */
-    protected final RefQueueHandler refHandler;
+    protected RefQueueHandler refHandler;


     /**
@@ -112,6 +112,8 @@
             this.workerThread = null; // indicate shutdown
             wt.interrupt();
         }
+
+        refHandler = null;
     }




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