Merge pull request #1455 from fl4via/UNDERTOW-2249

[UNDERTOW-2249] At ClientConnection, use ClosedChannelException to no…

Author: fl4via

core/src/main/java/io/undertow/client/ajp/AjpClientConnection.java

@@ -240,6 +240,10 @@ public void sendRequest(final ClientRequest request, final ClientCallback<Client
             clientCallback.failed(UndertowClientMessages.MESSAGES.closedConnectionState());
             return;
         }
+        if (anyAreSet(state, CLOSE_REQ | CLOSED)) {
+            clientCallback.failed(new ClosedChannelException());
+            return;
+        }
         final AjpClientExchange AjpClientExchange = new AjpClientExchange(clientCallback, request, this);
         if (currentRequest == null) {
             initiateRequest(AjpClientExchange);

core/src/main/java/io/undertow/client/http/HttpClientConnection.java

@@ -355,6 +355,10 @@ public void sendRequest(final ClientRequest request, final ClientCallback<Client
             clientCallback.failed(UndertowClientMessages.MESSAGES.closedConnectionState());
             return;
         }
+        if (anyAreSet(state, CLOSE_REQ | CLOSED)) {
+            clientCallback.failed(new ClosedChannelException());
+            return;
+        }
         final HttpClientExchange httpClientExchange = new HttpClientExchange(clientCallback, request, this);
         boolean ssl = this.connection instanceof SslConnection;
         if(!ssl && !http2Tried && options.get(UndertowOptions.ENABLE_HTTP2, UndertowOptions.DEFAULT_ENABLE_HTTP2) && !request.getRequestHeaders().contains(Headers.UPGRADE)) {