Add some diagnostics

log4j-core/src/test/java/org/apache/logging/log4j/core/net/mock/MockTcpSyslogServer.java

@@ -18,6 +18,7 @@ package org.apache.logging.log4j.core.net.mock;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.BindException;
 import java.net.ServerSocket;
 import java.net.Socket;
 
@@ -49,6 +50,7 @@ public class MockTcpSyslogServer extends MockSyslogServer {
 
     @Override
     public void run() {
+        System.out.println("TCP Server started");
         this.thread = Thread.currentThread();
         while (!shutdown) {
             try {
@@ -70,6 +72,8 @@ public class MockTcpSyslogServer extends MockSyslogServer {
                             System.out.println("Message too long");
                         }
                     }
+                } catch (BindException be) {
+                    be.printStackTrace();
                 } finally {
                     if (socket != null) {
                         socket.close();
@@ -81,5 +85,6 @@ public class MockTcpSyslogServer extends MockSyslogServer {
                 }
             }
         }
+        System.out.println("TCP Server stopped");
     }
 }

log4j-core/src/test/java/org/apache/logging/log4j/core/net/mock/MockUdpSyslogServer.java

@@ -46,6 +46,7 @@ public class MockUdpSyslogServer extends MockSyslogServer {
 
     @Override
     public void run() {
+        System.out.println("UDP Server Started");
         this.thread = Thread.currentThread();
         final byte[] bytes = new byte[4096];
         final DatagramPacket packet = new DatagramPacket(bytes, bytes.length);
@@ -60,5 +61,6 @@ public class MockUdpSyslogServer extends MockSyslogServer {
                 Throwables.rethrow(e);
             }
         }
+        System.out.println("UDP Server stopped");
     }
 }
\ No newline at end of file