From 0561c78c9dcb5876a140ff7be97f0f37abc36ec8 Mon Sep 17 00:00:00 2001
From: boyce <w@ojbk.io>
Date: Wed, 8 May 2024 02:10:31 +0800
Subject: [PATCH] client: add user-friendly error message of LB policy update
 timed out (#7206)

---
 picker_wrapper.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/picker_wrapper.go b/picker_wrapper.go
index bf56faa76d3d..56e8aba783f7 100644
--- a/picker_wrapper.go
+++ b/picker_wrapper.go
@@ -20,6 +20,7 @@ package grpc
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"sync"
 
@@ -117,7 +118,7 @@ func (pw *pickerWrapper) pick(ctx context.Context, failfast bool, info balancer.
 				if lastPickErr != nil {
 					errStr = "latest balancer error: " + lastPickErr.Error()
 				} else {
-					errStr = ctx.Err().Error()
+					errStr = fmt.Sprintf("received context error while waiting for new LB policy update: %s", ctx.Err().Error())
 				}
 				switch ctx.Err() {
 				case context.DeadlineExceeded: