Update journaltarget from loki/promtail (#1995)

CHANGELOG.md

@@ -52,6 +52,8 @@ Main (unreleased)
 
 - Fixed a bug in `import.git` which caused a `"non-fast-forward update"` error message. (@ptodev)
 
+- Do not log error on clean shutdown of `loki.source.journal`. (@thampiotr) 
+
 ### Other changes
 
 - Small fix in UI stylesheet to fit more content into visible table area. (@defanator)

internal/component/loki/source/journal/internal/target/journaltarget.go

@@ -2,8 +2,8 @@
 
 package target
 
-// This code is copied from Promtail (https://github.com/grafana/loki/commit/954df433e98f659d006ced52b23151cb5eb2fdfa) with minor edits. The target package is used to
-// configure and run the targets that can read journal entries and forward them
+// This code is copied from Promtail (https://github.com/grafana/loki/blob/baaaa83c78c03c6b9257afddc0854daec928a755/clients/pkg/promtail/targets/journal/journaltarget.go#L4)
+// with minor edits. The target package is used to configure and run the targets that can read journal entries and forward them
 // to other loki components.
 
 import (
@@ -214,7 +214,11 @@ func journalTargetWithReader(
 		for {
 			err := t.r.Follow(until, io.Discard)
 			if err != nil {
-				if err == sdjournal.ErrExpired || err == syscall.EBADMSG || err == io.EOF || strings.HasPrefix(err.Error(), "failed to iterate journal:") {
+				if err == sdjournal.ErrExpired {
+					return
+				}
+
+				if err == syscall.EBADMSG || err == io.EOF || strings.HasPrefix(err.Error(), "failed to iterate journal:") {
 					level.Error(t.logger).Log("msg", "unable to follow journal", "err", err.Error())
 					return
 				}