From 01a1bb1d37ba5e5fedfee26c9a3d6a5111469d09 Mon Sep 17 00:00:00 2001
From: dmathieu <42@dmathieu.com>
Date: Wed, 24 Jul 2024 09:42:00 +0200
Subject: [PATCH] Write needs a write lock

---
 .../net/http/otelhttp/internal/request/resp_writer_wrapper.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/instrumentation/net/http/otelhttp/internal/request/resp_writer_wrapper.go b/instrumentation/net/http/otelhttp/internal/request/resp_writer_wrapper.go
index ca5c5e8c778..aea171fb260 100644
--- a/instrumentation/net/http/otelhttp/internal/request/resp_writer_wrapper.go
+++ b/instrumentation/net/http/otelhttp/internal/request/resp_writer_wrapper.go
@@ -41,8 +41,8 @@ func NewRespWriterWrapper(w http.ResponseWriter, onWrite func(int64)) *RespWrite
 // Write writes the bytes array into the [ResponseWriter], and tracks the
 // number of bytes written and last error.
 func (w *RespWriterWrapper) Write(p []byte) (int, error) {
-	w.mu.RLock()
-	defer w.mu.RUnlock()
+	w.mu.Lock()
+	defer w.mu.Unlock()
 
 	w.writeHeader(http.StatusOK)