1 files changed, 5 insertions, 2 deletions
diff --git a/src/org/traccar/protocol/OsmAndProtocolDecoder.java b/src/org/traccar/protocol/OsmAndProtocolDecoder.java
index da502ca65..f46511b27 100644
--- a/src/org/traccar/protocol/OsmAndProtocolDecoder.java
+++ b/src/org/traccar/protocol/OsmAndProtocolDecoder.java
@@ -48,8 +48,7 @@ public class OsmAndProtocolDecoder extends BaseProtocolDecoder {
         QueryStringDecoder decoder = new QueryStringDecoder(request.getUri());
         Map<String, List<String>> params = decoder.getParameters();
         if (params.isEmpty()) {
-            decoder = new QueryStringDecoder(
-                    request.getContent().toString(StandardCharsets.US_ASCII), false);
+            decoder = new QueryStringDecoder(request.getContent().toString(StandardCharsets.US_ASCII), false);
             params = decoder.getParameters();
         }
 
@@ -64,6 +63,10 @@ public class OsmAndProtocolDecoder extends BaseProtocolDecoder {
                 case "deviceid":
                     DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
                     if (deviceSession == null) {
+                        if (channel != null) {
+                            channel.write(
+                                    new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.BAD_REQUEST));
+                        }
                         return null;
                     }
                     position.setDeviceId(deviceSession.getDeviceId());