From cb348fb31decdf3d701793c28e9f56a02a6b304a Mon Sep 17 00:00:00 2001
From: Pierre Adam <p.adam@merim-groupe.com>
Date: Wed, 20 Mar 2024 15:24:25 +0100
Subject: [PATCH] Fixes #39586. Properly use headers from RestMulti when the
 datasource is empty.

Signed-off-by: Pierre Adam <p.adam@merim-groupe.com>
---
 .../reactive/server/handlers/PublisherResponseHandler.java      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/handlers/PublisherResponseHandler.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/handlers/PublisherResponseHandler.java
index c1af678260549..20110476a41f8 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/handlers/PublisherResponseHandler.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/handlers/PublisherResponseHandler.java
@@ -151,7 +151,7 @@ private List<StreamingResponseCustomizer> determineCustomizers(boolean isFirst)
         @Override
         public void onComplete() {
             if (!hadItem) {
-                StreamingUtil.setHeaders(requestContext, requestContext.serverResponse(), staticCustomizers);
+                StreamingUtil.setHeaders(requestContext, requestContext.serverResponse(), this.determineCustomizers(true));
             }
             if (json) {
                 String postfix = onCompleteText();