From 6df3a6e1c7e2628c53c5362f10290239754b790a Mon Sep 17 00:00:00 2001
From: Jochen Weber <jochen.weber@aoe.com>
Date: Tue, 19 Nov 2019 21:38:52 +0100
Subject: [PATCH] fix filebackend with non existing dir, bettter error messages

---
 core/cache/fileBackend.go       | 2 ++
 core/cache/multiLevelBackend.go | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/cache/fileBackend.go b/core/cache/fileBackend.go
index 15195df1a..93103902f 100644
--- a/core/cache/fileBackend.go
+++ b/core/cache/fileBackend.go
@@ -29,6 +29,8 @@ func NewFileBackend(baseDir string) *FileBackend {
 		baseDir = defaultBaseDir
 	}
 
+	_ = os.MkdirAll(baseDir, os.ModePerm)
+
 	fb := &FileBackend{
 		baseDir:        baseDir,
 		backendMetrics: NewBackendMetrics("file"),
diff --git a/core/cache/multiLevelBackend.go b/core/cache/multiLevelBackend.go
index a180f3399..965e5238d 100644
--- a/core/cache/multiLevelBackend.go
+++ b/core/cache/multiLevelBackend.go
@@ -74,7 +74,7 @@ func (mb *MultiLevelBackend) Purge(key string) error {
 	}
 
 	if 0 != len(errorList) {
-		return errors.New("not all backends succeeded")
+		return errors.New(fmt.Sprintf("Not all backends succeeded to Purge key %v, Errors: %v", key, errorList))
 	}
 
 	return nil
@@ -92,7 +92,7 @@ func (mb *MultiLevelBackend) Flush() error {
 	}
 
 	if 0 != len(errorList) {
-		return errors.New("ot all backends succeeded")
+		return errors.New(fmt.Sprintf("Not all backends succeeded to Flush. Errors: %v", errorList))
 	}
 
 	return nil