From 2595eb3504096ab833817a558f3d75805c957fd0 Mon Sep 17 00:00:00 2001
From: Oleg Kalnichevski <olegk@apache.org>
Date: Thu, 22 Jan 2026 17:36:45 +0100
Subject: [PATCH] Bug fix: Corrected exception propagation in protocol
 negotiators exception handling code

---
 .../org/apache/hc/core5/http2/impl/nio/PrefaceHandlerBase.java | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/httpcore5-h2/src/main/java/org/apache/hc/core5/http2/impl/nio/PrefaceHandlerBase.java b/httpcore5-h2/src/main/java/org/apache/hc/core5/http2/impl/nio/PrefaceHandlerBase.java
index 3a5912b47b..c967699dc7 100644
--- a/httpcore5-h2/src/main/java/org/apache/hc/core5/http2/impl/nio/PrefaceHandlerBase.java
+++ b/httpcore5-h2/src/main/java/org/apache/hc/core5/http2/impl/nio/PrefaceHandlerBase.java
@@ -96,9 +96,6 @@ public void exception(final IOSession session, final Exception cause) {
                 protocolHandler.exception(session, cause);
             } else {
                 CommandSupport.failCommands(session, cause);
-                if (exceptionCallback != null) {
-                    exceptionCallback.execute(cause);
-                }
             }
         } catch (final Exception ex) {
             if (completed.compareAndSet(false, true) && resultCallback != null) {