From 989288c1f03f651fade22b28c57ef10187da863e Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Thu, 7 Nov 2019 17:22:03 -0800
Subject: [PATCH] grpc-js: Add detail to invalid metadata error

---
 packages/grpc-js/src/metadata.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/grpc-js/src/metadata.ts b/packages/grpc-js/src/metadata.ts
index 67a23960..873e5ff5 100644
--- a/packages/grpc-js/src/metadata.ts
+++ b/packages/grpc-js/src/metadata.ts
@@ -16,6 +16,8 @@
  */
 
 import * as http2 from 'http2';
+import { log } from './logging';
+import { LogVerbosity } from './constants';
 const LEGAL_KEY_REGEX = /^[0-9a-z_.-]+$/;
 const LEGAL_NON_BINARY_VALUE_REGEX = /^[ -~]*$/;
 
@@ -272,8 +274,8 @@ export class Metadata {
           }
         }
       } catch (error) {
-        error.message = `Failed to add metadata entry ${key}: ${values}. ${error.message}`;
-        process.emitWarning(error);
+        const message = `Failed to add metadata entry ${key}: ${values}. ${error.message}. For more information see https://github.com/grpc/grpc-node/issues/1173`;
+        log(LogVerbosity.ERROR, message);
       }
     });
     return result;