From 803592679a5cf47f1de9a197f5ae45bad36e0e43 Mon Sep 17 00:00:00 2001
From: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
Date: Sun, 24 Mar 2024 13:51:58 +0200
Subject: [PATCH] mutex protect

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>
---
 go/vt/vttablet/grpctmclient/client.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/go/vt/vttablet/grpctmclient/client.go b/go/vt/vttablet/grpctmclient/client.go
index ca55ec7d521..45ba031b23c 100644
--- a/go/vt/vttablet/grpctmclient/client.go
+++ b/go/vt/vttablet/grpctmclient/client.go
@@ -188,6 +188,8 @@ func (client *grpcClient) dialPool(ctx context.Context, dialPoolGroup DialPoolGr
 		if err == nil {
 			return
 		}
+		client.mu.Lock()
+		defer client.mu.Unlock()
 		m[addr].cc.Close()
 		delete(m, addr)
 	}