From 1a28cdcf9b4abfe0909e051d13fd775668975199 Mon Sep 17 00:00:00 2001
From: Spencer Judge <spencer@temporal.io>
Date: Tue, 30 Jul 2024 09:21:57 -0700
Subject: [PATCH] Add warning on unparseable namespaces

---
 client/src/raw.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/client/src/raw.rs b/client/src/raw.rs
index d513c69bf..a78b9de9e 100644
--- a/client/src/raw.rs
+++ b/client/src/raw.rs
@@ -482,9 +482,10 @@ macro_rules! namespaced_request {
         // Attach namespace header
         $req.metadata_mut().insert(
             TEMPORAL_NAMESPACE_HEADER_KEY,
-            ns_str
-                .parse()
-                .unwrap_or_else(|_| AsciiMetadataValue::from_static("")),
+            ns_str.parse().unwrap_or_else(|e| {
+                warn!("Unable to parse namespace for header: {e:?}");
+                AsciiMetadataValue::from_static("")
+            }),
         );
         // Init metric labels
         AttachMetricLabels::namespace(ns_str)