mount: report filer IO error

related to https://github.com/chrislusf/seaweedfs/issues/1530

2 files changed, 8 insertions, 2 deletions

diff --git a/weed/filesys/meta_cache/meta_cache.go b/weed/filesys/meta_cache/meta_cache.go
index 247f0ce81..5ae4c1440 100644
--- a/weed/filesys/meta_cache/meta_cache.go
+++ b/weed/filesys/meta_cache/meta_cache.go
@@ -2,6 +2,7 @@ package meta_cache
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"sync"
 
@@ -116,6 +117,11 @@ func (mc *MetaCache) ListDirectoryEntries(ctx context.Context, dirPath util.Full
 	mc.RLock()
 	defer mc.RUnlock()
 
+
+	if !mc.visitedBoundary.HasVisited(dirPath) {
+		return nil, fmt.Errorf("unsynchronized dir: %v", dirPath)
+	}
+
 	entries, err := mc.localStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit)
 	if err != nil {
 		return nil, err
diff --git a/weed/filesys/meta_cache/meta_cache_init.go b/weed/filesys/meta_cache/meta_cache_init.go
index 455a8772c..3e1719224 100644
--- a/weed/filesys/meta_cache/meta_cache_init.go
+++ b/weed/filesys/meta_cache/meta_cache_init.go
@@ -10,9 +10,9 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
-func EnsureVisited(mc *MetaCache, client filer_pb.FilerClient, dirPath util.FullPath) {
+func EnsureVisited(mc *MetaCache, client filer_pb.FilerClient, dirPath util.FullPath) error {
 
-	mc.visitedBoundary.EnsureVisited(dirPath, func(path util.FullPath) (childDirectories []string, err error) {
+	return mc.visitedBoundary.EnsureVisited(dirPath, func(path util.FullPath) (childDirectories []string, err error) {
 
 		glog.V(4).Infof("ReadDirAllEntries %s ...", path)