Index: src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java
===================================================================
--- src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java	(revision 1178813)
+++ src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java	(working copy)
@@ -1202,7 +1202,7 @@
                 final ThreadPoolExecutor exec = new ThreadPoolExecutor(
                         poolSize, poolSize, KEEPALIVETIME, TimeUnit.SECONDS,
                         new LinkedBlockingQueue<Runnable>());
-
+                boolean wasSuccessful = false;
                 try {
                     // sample all resources with threadpool
                     final List<Future<HTTPSampleResult>> retExec = exec.invokeAll(liste);
@@ -1217,10 +1217,19 @@
                         res.addSubResult(binRes);
                         res.setSuccessful(res.isSuccessful() && binRes.isSuccessful());
                     }
+                    wasSuccessful = true;
                 } catch (InterruptedException ie) {
                     log.warn("Interruped fetching embedded resources", ie); // $NON-NLS-1$
                 } catch (ExecutionException ee) {
                     log.warn("Execution issue when fetching embedded resources", ee); // $NON-NLS-1$
+                } finally {
+                    if(!wasSuccessful) {
+                        try {
+                            exec.shutdownNow();
+                        } catch (Exception e) {
+                            //NOOP
+                        }
+                    }
                 }
             }
         }