--- src/core/org/apache/jmeter/util/JSR223TestElement.java	(revision 1356029)
+++ src/core/org/apache/jmeter/util/JSR223TestElement.java	(working copy)
@@ -43,6 +43,20 @@ 
 public abstract class JSR223TestElement extends AbstractTestElement
     implements Serializable, Cloneable
 {
+    /**
+     * Initialization On Demand Holder pattern
+     */
+    private static class LazyHolder {
+        public static final ScriptEngineManager INSTANCE = new ScriptEngineManager();
+    }
+ 
+    /**
+     * @return ScriptEngineManager singleton
+     */
+    public static ScriptEngineManager getInstance() {
+            return LazyHolder.INSTANCE;
+    }
+    
     private static final long serialVersionUID = 233L;
 
     //++ For TestBean implementations only
@@ -79,13 +93,19 @@ 
        return o;
     }
 
-    protected ScriptEngineManager getManager() {
-        ScriptEngineManager sem = new ScriptEngineManager();
-        initManager(sem);
-        return sem;
+    protected ScriptEngine getScriptEngine() throws ScriptException {
+        final String lang = getScriptLanguage();
+
+        ScriptEngine scriptEngine = getInstance().getEngineByName(lang);
+        if (scriptEngine == null) {
+            throw new ScriptException("Cannot find engine named: "+lang);
+        }
+
+        initScriptEngine(scriptEngine);
+        return scriptEngine;
     }
 
-    protected void initManager(ScriptEngineManager sem) {
+    protected void initScriptEngine(ScriptEngine sem) {
         final String label = getName();
         final String fileName = getFilename();
         final String scriptParameters = getParameters();
@@ -116,15 +136,8 @@ 
     }
 
 
-    protected Object processFileOrScript(ScriptEngineManager sem) throws IOException, ScriptException {
-
-        final String lang = getScriptLanguage();
-        ScriptEngine scriptEngine = sem.getEngineByName(lang);
-        if (scriptEngine == null) {
-            throw new ScriptException("Cannot find engine named: "+lang);
-        }
-
-        File scriptFile = new File(getFilename());
+    protected Object processFileOrScript(ScriptEngine scriptEngine) throws IOException, ScriptException {
+        File scriptFile = new File(getFilename());        
         if (scriptFile.exists()) {
             BufferedReader fileReader = null;
             try {
@@ -136,7 +149,6 @@ 
         } else {
             return scriptEngine.eval(getScript());
         }
-
     }
 
     /**
@@ -184,5 +196,4 @@ 
     public void setScriptLanguage(String s) {
         scriptLanguage = s;
     }
-
-}
+}
--- src/components/org/apache/jmeter/extractor/JSR223PostProcessor.java	(revision 1356029)
+++ src/components/org/apache/jmeter/extractor/JSR223PostProcessor.java	(working copy)
@@ -20,7 +20,7 @@ 
 
 import java.io.IOException;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.processor.PostProcessor;
@@ -36,15 +36,13 @@ 
     private static final long serialVersionUID = 232L;
 
     public void process() {
-
         try {
-            ScriptEngineManager sem = getManager();
-            if(sem == null) { return; }
-            processFileOrScript(sem);
+            ScriptEngine scriptEngine = getScriptEngine();
+            processFileOrScript(scriptEngine);
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         }
     }
 }
--- src/components/org/apache/jmeter/assertions/JSR223Assertion.java	(revision 1356029)
+++ src/components/org/apache/jmeter/assertions/JSR223Assertion.java	(working copy)
@@ -20,7 +20,7 @@ 
 
 import java.io.IOException;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.samplers.SampleResult;
@@ -38,23 +38,17 @@ 
     public AssertionResult getResult(SampleResult response) {
         AssertionResult result = new AssertionResult(getName());
         try {
-            ScriptEngineManager mgr = getManager();
-            if (mgr == null) {
-                result.setFailure(true);
-                result.setError(true);
-                result.setFailureMessage("JSR223 Manager not found");
-                return result;
-            }
-            mgr.put("SampleResult", response);
-            mgr.put("AssertionResult", result);
-            processFileOrScript(mgr);
+            ScriptEngine scriptEngine = getScriptEngine();
+            scriptEngine.put("SampleResult", response);
+            scriptEngine.put("AssertionResult", result);
+            processFileOrScript(scriptEngine);
             result.setError(false);
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
             result.setError(true);
             result.setFailureMessage(e.toString());
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
             result.setError(true);
             result.setFailureMessage(e.toString());
         }
--- src/components/org/apache/jmeter/visualizers/JSR223Listener.java	(revision 1356029)
+++ src/components/org/apache/jmeter/visualizers/JSR223Listener.java	(working copy)
@@ -20,7 +20,7 @@ 
 
 import java.io.IOException;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.samplers.SampleEvent;
@@ -41,15 +41,14 @@ 
 
     public void sampleOccurred(SampleEvent event) {
         try {
-            ScriptEngineManager sem = getManager();
-            if (sem == null) { return; }
-            sem.put("sampleEvent", event);
-            sem.put("sampleResult", event.getResult());
-            processFileOrScript(sem);
+            ScriptEngine scriptEngine = getScriptEngine();
+            scriptEngine.put("sampleEvent", event);
+            scriptEngine.put("sampleResult", event.getResult());
+            processFileOrScript(scriptEngine);
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         }
     }
 
--- src/components/org/apache/jmeter/modifiers/JSR223PreProcessor.java	(revision 1356029)
+++ src/components/org/apache/jmeter/modifiers/JSR223PreProcessor.java	(working copy)
@@ -20,7 +20,7 @@ 
 
 import java.io.IOException;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.processor.PreProcessor;
@@ -36,15 +36,13 @@ 
     private static final long serialVersionUID = 232L;
 
     public void process() {
-
         try {
-            ScriptEngineManager sem = getManager();
-            if(sem == null) { return; }
-            processFileOrScript(sem);
+            ScriptEngine scriptEngine = getScriptEngine();
+            processFileOrScript(scriptEngine);
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         }
     }
 }
--- src/components/org/apache/jmeter/timers/JSR223Timer.java	(revision 1356029)
+++ src/components/org/apache/jmeter/timers/JSR223Timer.java	(working copy)
@@ -20,7 +20,7 @@ 
 
 import java.io.IOException;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.testbeans.TestBean;
@@ -37,22 +37,19 @@ 
     public long delay() {
         long delay = 0;
         try {
-            ScriptEngineManager mgr = getManager();
-            if (mgr == null) {
-                return 0; 
-            }
-            Object o = processFileOrScript(mgr);
+            ScriptEngine scriptEngine = getScriptEngine();
+            Object o = processFileOrScript(scriptEngine);
             if (o == null) {
                 log.warn("Script did not return a value");
                 return 0;
             }
             delay = Long.valueOf(o.toString()).longValue();
         } catch (NumberFormatException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
         }
         return delay;
     }
--- src/protocol/java/org/apache/jmeter/protocol/java/sampler/JSR223Sampler.java	(revision 1356029)
+++ src/protocol/java/org/apache/jmeter/protocol/java/sampler/JSR223Sampler.java	(working copy)
@@ -23,7 +23,7 @@ 
 import java.util.HashSet;
 import java.util.Set;
 
-import javax.script.ScriptEngineManager;
+import javax.script.ScriptEngine;
 import javax.script.ScriptException;
 
 import org.apache.jmeter.config.ConfigTestElement;
@@ -58,15 +58,9 @@ 
         result.setDataType(SampleResult.TEXT);
         result.sampleStart();
         try {
-            ScriptEngineManager mgr = getManager();
-            if (mgr == null) {
-                result.setSuccessful(false);
-                result.setResponseCode("500"); // $NON-NLS-1$
-                result.setResponseMessage("Could not instantiate ScriptManager");
-                return result;
-            }
-            mgr.put("SampleResult",result);
-            Object ret = processFileOrScript(mgr);
+            ScriptEngine scriptEngine = getScriptEngine();
+            scriptEngine.put("SampleResult",result);
+            Object ret = processFileOrScript(scriptEngine);
             result.setSuccessful(true);
             result.setResponseCodeOK();
             result.setResponseMessageOK();
@@ -74,12 +68,12 @@ 
                 result.setResponseData(ret.toString(), null);
             }
         } catch (IOException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
             result.setSuccessful(false);
             result.setResponseCode("500"); // $NON-NLS-1$
             result.setResponseMessage(e.toString());
         } catch (ScriptException e) {
-            log.warn("Problem in JSR223 script "+e);
+            log.warn("Problem in JSR223 script "+e, e);
             result.setSuccessful(false);
             result.setResponseCode("500"); // $NON-NLS-1$
             result.setResponseMessage(e.toString());