diff --git a/fail2ban/server/asyncserver.py b/fail2ban/server/asyncserver.py
index ea6cc326..e18451a4 100644
--- a/fail2ban/server/asyncserver.py
+++ b/fail2ban/server/asyncserver.py
@@ -37,7 +37,7 @@ import traceback
 
 from .utils import Utils
 from ..protocol import CSPROTO
-from ..helpers import getLogger,formatExceptionInfo
+from ..helpers import logging, getLogger, formatExceptionInfo
 
 # Gets the instance of the logger.
 logSys = getLogger(__name__)
@@ -88,9 +88,12 @@ class RequestHandler(asynchat.async_chat):
 			message = dumps(message, HIGHEST_PROTOCOL)
 			# Sends the response to the client.
 			self.push(message + CSPROTO.END)
-		except Exception as e: # pragma: no cover
+		except Exception as e:
 			logSys.error("Caught unhandled exception: %r", e,
 				exc_info=logSys.getEffectiveLevel()<=logging.DEBUG)
+			# Sends the response to the client.
+			message = dumps("ERROR: %s" % e, HIGHEST_PROTOCOL)
+			self.push(message + CSPROTO.END)
 
 		
 	def handle_error(self):
@@ -161,10 +164,10 @@ class AsyncServer(asyncore.dispatcher):
 	def handle_accept(self):
 		try:
 			conn, addr = self.accept()
-		except socket.error:
+		except socket.error: # pragma: no cover
 			logSys.warning("Socket error")
 			return
-		except TypeError:
+		except TypeError: # pragma: no cover
 			logSys.warning("Type error")
 			return
 		AsyncServer.__markCloseOnExec(conn)
@@ -194,7 +197,7 @@ class AsyncServer(asyncore.dispatcher):
 		self.set_reuse_addr()
 		try:
 			self.bind(sock)
-		except Exception:
+		except Exception: # pragma: no cover
 			raise AsyncServerException("Unable to bind socket %s" % self.__sock)
 		AsyncServer.__markCloseOnExec(self.socket)
 		self.listen(1)
diff --git a/fail2ban/tests/sockettestcase.py b/fail2ban/tests/sockettestcase.py
index 1a94a952..f6d86582 100644
--- a/fail2ban/tests/sockettestcase.py
+++ b/fail2ban/tests/sockettestcase.py
@@ -32,37 +32,57 @@ import time
 import unittest
 
 from .. import protocol
-from ..server.asyncserver import AsyncServer, AsyncServerException
+from ..server.asyncserver import RequestHandler, AsyncServer, AsyncServerException
 from ..server.utils import Utils
 from ..client.csocket import CSocket
 
+from .utils import LogCaptureTestCase
 
-class Socket(unittest.TestCase):
+
+def TestMsgError(*args):
+	raise Exception('test unpickle error')
+class TestMsg(object):
+	def __reduce__(self):
+		return (TestMsgError, ())
+
+
+class Socket(LogCaptureTestCase):
 
 	def setUp(self):
 		"""Call before every test case."""
+		LogCaptureTestCase.setUp(self)
 		super(Socket, self).setUp()
 		self.server = AsyncServer(self)
 		sock_fd, sock_name = tempfile.mkstemp('fail2ban.sock', 'socket')
 		os.close(sock_fd)
 		os.remove(sock_name)
 		self.sock_name = sock_name
+		self.serverThread = None
 
 	def tearDown(self):
 		"""Call after every test case."""
+		if self.serverThread:
+			self.server.stop(); # stop if not already stopped
+			self.serverThread.join()
+		LogCaptureTestCase.tearDown(self)
 
 	@staticmethod
 	def proceed(message):
 		"""Test transmitter proceed method which just returns first arg"""
 		return message
 
-	def testStopPerCloseUnexpected(self):
+	def _createServerThread(self):
 		# start in separate thread :
-		serverThread = threading.Thread(
+		self.serverThread = serverThread = threading.Thread(
 			target=self.server.start, args=(self.sock_name, False))
 		serverThread.daemon = True
 		serverThread.start()
 		self.assertTrue(Utils.wait_for(self.server.isActive, unittest.F2B.maxWaitTime(10)))
+		return serverThread
+
+	def testStopPerCloseUnexpected(self):
+		# start in separate thread :
+		serverThread = self._createServerThread()
 		# unexpected stop directly after start:
 		self.server.close()
 		# wait for end of thread :
@@ -81,22 +101,31 @@ class Socket(unittest.TestCase):
 			return None
 
 	def testSocket(self):
-		serverThread = threading.Thread(
-			target=self.server.start, args=(self.sock_name, False))
-		serverThread.daemon = True
-		serverThread.start()
-		self.assertTrue(Utils.wait_for(self.server.isActive, unittest.F2B.maxWaitTime(10)))
-		time.sleep(Utils.DEFAULT_SLEEP_TIME)
-
+		# start in separate thread :
+		serverThread = self._createServerThread()
 		client = Utils.wait_for(self._serverSocket, 2)
+
 		testMessage = ["A", "test", "message"]
 		self.assertEqual(client.send(testMessage), testMessage)
 
+		# test wrong message:
+		self.assertEqual(client.send([[TestMsg()]]), 'ERROR: test unpickle error')
+		self.assertLogged("Caught unhandled exception", "test unpickle error", all=True)
+
+		# test good message again:
+		self.assertEqual(client.send(testMessage), testMessage)
+
 		# test close message
 		client.close()
 		# 2nd close does nothing
 		client.close()
 
+		# force shutdown:
+		self.server.stop_communication()
+		# test send again (should get in shutdown message):
+		client = Utils.wait_for(self._serverSocket, 2)
+		self.assertEqual(client.send(testMessage), ['SHUTDOWN'])
+
 		self.server.stop()
 		# wait for end of thread :
 		Utils.wait_for(lambda: not serverThread.isAlive() 
@@ -105,6 +134,25 @@ class Socket(unittest.TestCase):
 		self.assertFalse(self.server.isActive())
 		self.assertFalse(os.path.exists(self.sock_name))
 
+
+	def testSocketConnectBroken(self):
+		# start in separate thread :
+		serverThread = self._createServerThread()
+		client = Utils.wait_for(self._serverSocket, 2)
+
+		testMessage = ["A", "test", "message"]
+		self.assertEqual(client.send(testMessage), testMessage)
+
+		org_handler = RequestHandler.found_terminator
+		try:
+			RequestHandler.found_terminator = lambda self: TestMsgError()
+			self.assertRaisesRegexp(RuntimeError, r"socket connection broken", client.send, testMessage)
+		finally:
+			RequestHandler.found_terminator = org_handler
+		
+		self.assertLogged("Unexpected communication error", "test unpickle error", all=True)
+		self.server.stop()
+
 	def testSocketForce(self):
 		open(self.sock_name, 'w').close() # Create sock file
 		# Try to start without force