diff --git a/ChangeLog.txt b/ChangeLog.txt
index 2e0dea53..da60e2e1 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -12,6 +12,7 @@ Version 0.7:
     Fixed github issue #30, returning error on mapdb file not deleted that corrupt reiterated builds
     Added handling of allow_anonymous clients (as in mosquitto issue #34)
     Modified the password_file format to use password stored in sha256 and not plain text
+    Added ACL file for topic read|write operations.
 
 Version 0.6:
     Fix issue #42, bad password file path composition
diff --git a/tools_scripts/integration/issue42_publishBigMessage.groovy b/tools_scripts/integration/issue42_publishBigMessage.groovy
new file mode 100644
index 00000000..d311b8df
--- /dev/null
+++ b/tools_scripts/integration/issue42_publishBigMessage.groovy
@@ -0,0 +1,91 @@
+@GrabResolver(name='Paho', root="https://repo.eclipse.org/content/repositories/paho-releases/")
+@Grab(group='org.eclipse.paho', module='org.eclipse.paho.client.mqttv3', version='1.0.2')
+
+import org.eclipse.paho.client.mqttv3.MqttClient
+import org.eclipse.paho.client.mqttv3.MqttMessage
+import org.eclipse.paho.client.mqttv3.MqttException
+import org.eclipse.paho.client.mqttv3.MqttCallback
+import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken
+import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence
+
+import java.nio.ByteBuffer
+import java.util.concurrent.CountDownLatch
+
+class SubscriberCallback implements MqttCallback {
+
+    int m_numReceived = 0
+    long m_startTime
+    boolean firstMessageReceived = false
+
+    private CountDownLatch m_latch = new CountDownLatch(1)
+
+    //Maps delay to num of messages reached with that delay
+    protected Map<Long, Long> distribution = [:]
+
+    void waitFinish() {
+        m_latch.await()
+    }
+
+    public void connectionLost(Throwable cause) {
+        m_latch.countDown()
+    }
+
+    public void messageArrived(String topic, MqttMessage message) throws Exception {
+        println "Received message on topic [${topic}]"
+        m_latch.countDown()
+//        if (!firstMessageReceived) {
+//            m_startTime = System.currentTimeMillis()
+//            firstMessageReceived = true
+//        }
+//        if (topic == "/log") {
+//
+//            m_latch.countDown()
+//        } else {
+//            ByteBuffer bb = ByteBuffer.wrap(message.payload)
+//            long sentTime = bb.getLong()
+//            long delay = System.currentTimeMillis() - sentTime
+//            //println "-received in ${delay}(ms) on ${topic} with QoS ${message.qos}"
+//            //distribution[delay] = distribution[delay] != null ? distribution[delay]++ : 1
+//            if (distribution[delay] != null) {
+//                distribution[delay]++
+//            } else {
+//                distribution[delay] = 1
+//            }
+//            m_numReceived++
+//        }
+    }
+
+    public void deliveryComplete(IMqttDeliveryToken token) {
+        //To change body of implemented methods use File | Settings | File Templates.
+    }
+}
+
+if (args.size() < 1) {
+    println "Usage: groovy issue42_publishBigMessage.groovy </path/to/a/file.tosend>"
+}
+
+File toSend = new File(args[0])
+
+String tmpDir = System.getProperty("java.io.tmpdir")
+MqttDefaultFilePersistence subDataStore = new MqttDefaultFilePersistence(tmpDir + "/sub")
+MqttClient subClient = new MqttClient("tcp://localhost:1883", "FileSubscriber", subDataStore)
+def callback = new SubscriberCallback()
+subClient.callback = callback
+subClient.connect()
+subClient.subscribe("/log", 0)
+
+
+MqttDefaultFilePersistence pubDataStore = new MqttDefaultFilePersistence(tmpDir + "/pub")
+MqttClient pubClient = new MqttClient("tcp://localhost:1883", "FilePublisher", pubDataStore)
+pubClient.connect()
+//MqttMessage message = new MqttMessage(toSend.bytes)
+//message.setQos(2)
+print "publishing.."
+//pubClient.getTopic("log").publish(message)
+pubClient.publish('/log', toSend.bytes, 2, false)
+println "published"
+pubClient.disconnect()
+println "disconnected publisher, waiting subscriber.."
+callback.waitFinish()
+subClient.disconnect()
+println "Finished!"
\ No newline at end of file