prevent TCPServer thread from stopping of poll() throws (due to resource issues)

Net/src/TCPServer.cpp

@@ -115,6 +115,8 @@ void TCPServer::run()
 	while (!_stopped)
 	{
 		Poco::Timespan timeout(250000);
+		try
+		{
 			if (_socket.poll(timeout, Socket::SELECT_READ))
 			{
 				try
@@ -138,6 +140,14 @@ void TCPServer::run()
 				}
 			}
 		}
+		catch (Poco::Exception& exc)
+		{
+			ErrorHandler::handle(exc);
+			// possibly a resource issue since poll() failed;
+			// give some time to recover before trying again
+			Poco::Thread::sleep(50); 
+		}
+	}
 }
 
 
@@ -146,6 +156,7 @@ int TCPServer::currentThreads() const
 	return _pDispatcher->currentThreads();
 }
 
+
 int TCPServer::maxThreads() const
 {
 	return _pDispatcher->maxThreads();