fixed NBEvent worker
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventClient.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventClient.java
index ec480cb..4728b79 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventClient.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventClient.java
@@ -40,6 +40,7 @@
      */
     public void connectToClient(String uri) {
         this.clientUri = uri;
+	log.info("here connectToClient");
         try {
             client.start();
             HttpAsyncRequestProducer get = HttpAsyncMethods.createGet(this.clientUri);
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventServer.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventServer.java
index 3313188..ddb7426 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventServer.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/EventServer.java
@@ -66,6 +66,7 @@
     }
 
     protected void doPost(HttpServletRequest request, HttpServletResponse response) {
+	log.info("here doPost");
         try {
             String clientUri = null;
             StringBuffer jsonStringBuilder = new StringBuffer();
@@ -75,7 +76,7 @@
                 while ((line = br.readLine()) != null)
                     jsonStringBuilder.append(line);
             } catch (Exception e) {
-                e.printStackTrace();
+	        log.error(ExceptionUtils.getFullStackTrace(e));
             }
 
             try {
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/JettyServer.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/JettyServer.java
index deba165..df6526a 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/JettyServer.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/JettyServer.java
@@ -40,7 +40,7 @@
 
 		try {
 			server.start();
-			log.info("Server Started");
+			log.info("Jetty server started");
 			server.join();
 		} catch (Exception e) {
 			log.error(ExceptionUtils.getFullStackTrace(e));
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/NBEventWorkerManager.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/NBEventWorkerManager.java
index 2a7bd54..16c8caf 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/NBEventWorkerManager.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/NBEventWorkerManager.java
@@ -21,10 +21,7 @@
 import java.util.AbstractMap;
 import java.util.Map;
 import java.util.Map.Entry;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.*;
 
 /**
  * Implements a Worker to process event-data pairs sent by the FPC Client
@@ -66,53 +63,56 @@
     }
 
     public void open() {
-        this.run = true;
-        Entry<String, Entry<String, String>> contents = null;
-        while (run) {
-            try {
-                contents = blockingQueue.take();
+        ExecutorService executorService = Executors.newFixedThreadPool(this.poolSize);
+        executorService.submit(() -> {
+            this.run = true;
+            Entry<String, Entry<String, String>> contents = null;
+            while (run) {
+                try {
+                    contents = blockingQueue.take();
 
-                // call RESTCONF service
-                ObjectMapper mapper = new ObjectMapper();
-                ObjectNode node = (ObjectNode) mapper.readTree(contents.getValue().getValue());
-                if (contents.getValue().getKey().contains("ietf-dmm-fpcagent:configure")) {
-                    CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
-                            new URI("/onos/restconf/operations/ietf-dmm-fpcagent:configure"),
-                            node,
-                            contents.getKey()
-                    );
-                    ConfigureService.blockingQueue.add(
-                            new AbstractMap.SimpleEntry(
-                                    contents.getKey(),
-                                    "event:application/json;/restconf/operations/ietf-dmm-fpcagent:configure\ndata:" + output.get().output().toString() + "\r\n"
-                            )
-                    );
-                } else if (contents.getValue().getKey().contains("fpc:register-client")) {
-                    CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
-                            new URI("/onos/restconf/operations/fpc:register-client"),
-                            node,
-                            contents.getKey()
-                    );
-                    addClientIdToUriMapping(output.get().output().toString(), contents.getKey());
-                    ConfigureService.registerClientQueue.add(
-                            new AbstractMap.SimpleEntry(
-                                    contents.getKey(),
-                                    "event:application/json;/restconf/operations/fpc:register_client\ndata:" + output.get().output().toString() + "\r\n"
-                            )
-                    );
-                } else if (contents.getValue().getKey().contains("fpc:deregister-client")) {
-                    CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
-                            new URI("/onos/restconf/operations/fpc:deregister-client"),
-                            node,
-                            contents.getKey()
-                    );
-                    removeClientIdToUriMapping(contents.getValue().getValue());
+                    // call RESTCONF service
+                    ObjectMapper mapper = new ObjectMapper();
+                    ObjectNode node = (ObjectNode) mapper.readTree(contents.getValue().getValue());
+                    if (contents.getValue().getKey().contains("ietf-dmm-fpcagent:configure")) {
+                        CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
+                                new URI("/onos/restconf/operations/ietf-dmm-fpcagent:configure"),
+                                node,
+                                contents.getKey()
+                        );
+                        ConfigureService.blockingQueue.add(
+                                new AbstractMap.SimpleEntry(
+                                        contents.getKey(),
+                                        "event:application/json;/restconf/operations/ietf-dmm-fpcagent:configure\ndata:" + output.get().output().toString() + "\r\n"
+                                )
+                        );
+                    } else if (contents.getValue().getKey().contains("fpc:register-client")) {
+                        CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
+                                new URI("/onos/restconf/operations/fpc:register-client"),
+                                node,
+                                contents.getKey()
+                        );
+                        addClientIdToUriMapping(output.get().output().toString(), contents.getKey());
+                        ConfigureService.registerClientQueue.add(
+                                new AbstractMap.SimpleEntry(
+                                        contents.getKey(),
+                                        "event:application/json;/restconf/operations/fpc:register_client\ndata:" + output.get().output().toString() + "\r\n"
+                                )
+                        );
+                    } else if (contents.getValue().getKey().contains("fpc:deregister-client")) {
+                        CompletableFuture<RestconfRpcOutput> output = restconfService.runRpc(
+                                new URI("/onos/restconf/operations/fpc:deregister-client"),
+                                node,
+                                contents.getKey()
+                        );
+                        removeClientIdToUriMapping(contents.getValue().getValue());
+                    }
+
+                } catch (Exception e) {
+                    log.error(ExceptionUtils.getFullStackTrace(e));
                 }
-
-            } catch (Exception e) {
-                log.error(ExceptionUtils.getFullStackTrace(e));
             }
-        }
+        });
     }
 
     /**
@@ -149,3 +149,4 @@
         this.run = false;
     }
 }
+
diff --git a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/ParseStream.java b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/ParseStream.java
index edd2415..0705f4c 100644
--- a/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/ParseStream.java
+++ b/apps/fpcagent/src/main/java/org/onosproject/fpcagent/util/eventStream/ParseStream.java
@@ -65,6 +65,7 @@
     public void run() {
         chunkedBuffer = false;
         String event = null, data = null;
+	log.info("ParseStream started");
         while (true) {
             try {
                 Map.Entry<String, CharBuffer> entry = blockingQueue.take();