From 9c2ed2dc805bd3d8753437afa3c72f58b3701493 Mon Sep 17 00:00:00 2001
From: Tanjin Xu <tanjin.xu@slack-corp.com>
Date: Mon, 16 Oct 2023 10:42:45 -0700
Subject: [PATCH] add debugging message

---
 go/vt/vttablet/tabletmanager/replmanager.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/go/vt/vttablet/tabletmanager/replmanager.go b/go/vt/vttablet/tabletmanager/replmanager.go
index 3f949494be4..b9c796d55d3 100644
--- a/go/vt/vttablet/tabletmanager/replmanager.go
+++ b/go/vt/vttablet/tabletmanager/replmanager.go
@@ -114,6 +114,7 @@ func (rm *replManager) checkActionLocked() {
 		if status.SQLHealthy() || status.IOHealthy() {
 			return
 		}
+		log.Infof("slack error: either sql or io thread is not healthy: sql: %v, io: %v", status.SQLHealthy(), status.IOHealthy())
 	}
 
 	if !rm.failed {