From 36efb920d7d1677143848c61cea6b488f7769d13 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Vav=C5=99=C3=ADk?= <mvavrik@redhat.com>
Date: Mon, 5 Jun 2023 10:27:17 +0200
Subject: [PATCH] Prevent NPE in DEV UI JsonRpc#route method

---
 .../main/java/io/quarkus/devui/runtime/comms/JsonRpcRouter.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extensions/vertx-http/runtime/src/main/java/io/quarkus/devui/runtime/comms/JsonRpcRouter.java b/extensions/vertx-http/runtime/src/main/java/io/quarkus/devui/runtime/comms/JsonRpcRouter.java
index dd29949c732ba..310437b29257a 100644
--- a/extensions/vertx-http/runtime/src/main/java/io/quarkus/devui/runtime/comms/JsonRpcRouter.java
+++ b/extensions/vertx-http/runtime/src/main/java/io/quarkus/devui/runtime/comms/JsonRpcRouter.java
@@ -197,7 +197,7 @@ private void route(JsonRpcRequest jsonRpcRequest, ServerWebSocket s) {
                 }
                 uni.subscribe()
                         .with(item -> {
-                            if (JsonRpcMessage.class.isAssignableFrom(item.getClass())) {
+                            if (item != null && JsonRpcMessage.class.isAssignableFrom(item.getClass())) {
                                 JsonRpcMessage jsonRpcMessage = (JsonRpcMessage) item;
                                 codec.writeResponse(s, jsonRpcRequest.getId(), jsonRpcMessage.getResponse(),
                                         jsonRpcMessage.getMessageType());