From 21f69643b3cc99c85ea48c983c1967916139b95e Mon Sep 17 00:00:00 2001
From: Tristan Colgate-McFarlane <tcolgate@gmail.com>
Date: Thu, 16 Jun 2022 08:55:19 +0100
Subject: [PATCH] promtail: fix infinite loop in file target (fixes #5350)
 (#6135)

---
 clients/pkg/promtail/targets/file/filetarget.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/clients/pkg/promtail/targets/file/filetarget.go b/clients/pkg/promtail/targets/file/filetarget.go
index e8f4a5d515..b212d72421 100644
--- a/clients/pkg/promtail/targets/file/filetarget.go
+++ b/clients/pkg/promtail/targets/file/filetarget.go
@@ -168,7 +168,11 @@ func (t *FileTarget) run() {
 
 	for {
 		select {
-		case event := <-t.fileEventWatcher:
+		case event, ok := <-t.fileEventWatcher:
+			if !ok {
+				// fileEventWatcher has been closed
+				return
+			}
 			switch event.Op {
 			case fsnotify.Create:
 				t.startTailing([]string{event.Name})