From 8a7e1a8603522661a66996af0dda04b9c953412f Mon Sep 17 00:00:00 2001
From: Ewout Prangsma <ewout@prangsma.net>
Date: Thu, 5 Apr 2018 08:47:59 +0200
Subject: [PATCH] Prevent panic on duplicate Delete (storage)

---
 pkg/storage/local_storage.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/storage/local_storage.go b/pkg/storage/local_storage.go
index 9e1c2b437..2591bda6d 100644
--- a/pkg/storage/local_storage.go
+++ b/pkg/storage/local_storage.go
@@ -26,6 +26,7 @@ import (
 	"context"
 	"fmt"
 	"reflect"
+	"sync/atomic"
 	"time"
 
 	"github.com/rs/zerolog"
@@ -89,6 +90,7 @@ type LocalStorage struct {
 
 	eventCh chan *localStorageEvent
 	stopCh  chan struct{}
+	stopped int32
 
 	eventsCli corev1.EventInterface
 
@@ -136,7 +138,9 @@ func (ls *LocalStorage) Update(apiObject *api.ArangoLocalStorage) {
 // Called when the local storage was deleted by the user.
 func (ls *LocalStorage) Delete() {
 	ls.deps.Log.Info().Msg("local storage is deleted by user")
-	close(ls.stopCh)
+	if atomic.CompareAndSwapInt32(&ls.stopped, 0, 1) {
+		close(ls.stopCh)
+	}
 }
 
 // send given event into the local storage event queue.