4 files changed, 13 insertions, 13 deletions
diff --git a/weed/storage/needle/needle_read_write.go b/weed/storage/needle/needle_read_write.go
index 4f8909faa..e758a6fee 100644
--- a/weed/storage/needle/needle_read_write.go
+++ b/weed/storage/needle/needle_read_write.go
@@ -24,7 +24,7 @@ const (
 	TtlBytesLength          = 2
 )
 
-var ErrSizeMismatch = errors.New("size mismatch")
+var ErrorSizeMismatch = errors.New("size mismatch")
 
 func (n *Needle) DiskSize(version Version) int64 {
 	return GetActualSize(n.Size, version)
@@ -173,7 +173,7 @@ func (n *Needle) ReadBytes(bytes []byte, offset int64, size Size, version Versio
 		// cookie is not always passed in for this API. Use size to do preliminary checking.
 		if OffsetSize == 4 && offset < int64(MaxPossibleVolumeSize) {
 			glog.Errorf("entry not found1: offset %d found id %x size %d, expected size %d", offset, n.Id, n.Size, size)
-			return ErrSizeMismatch
+			return ErrorSizeMismatch
 		}
 		return fmt.Errorf("entry not found: offset %d found id %x size %d, expected size %d", offset, n.Id, n.Size, size)
 	}
diff --git a/weed/storage/store_ec.go b/weed/storage/store_ec.go
index 55b9a6fc6..a9b6a8ff3 100644
--- a/weed/storage/store_ec.go
+++ b/weed/storage/store_ec.go
@@ -130,7 +130,7 @@ func (s *Store) ReadEcShardNeedle(vid needle.VolumeId, n *needle.Needle) (int, e
 				return 0, fmt.Errorf("locate in local ec volume: %v", err)
 			}
 			if size.IsDeleted() {
-				return 0, ErrDeleted
+				return 0, ErrorDeleted
 			}
 
 			glog.V(3).Infof("read ec volume %d offset %d size %d intervals:%+v", vid, offset.ToActualOffset(), size, intervals)
@@ -143,7 +143,7 @@ func (s *Store) ReadEcShardNeedle(vid needle.VolumeId, n *needle.Needle) (int, e
 				return 0, fmt.Errorf("ReadEcShardIntervals: %v", err)
 			}
 			if isDeleted {
-				return 0, ErrDeleted
+				return 0, ErrorDeleted
 			}
 
 			err = n.ReadBytes(bytes, offset.ToActualOffset(), size, localEcVolume.Version)
diff --git a/weed/storage/volume_checking.go b/weed/storage/volume_checking.go
index f6e75a07c..b76933083 100644
--- a/weed/storage/volume_checking.go
+++ b/weed/storage/volume_checking.go
@@ -30,7 +30,7 @@ func CheckAndFixVolumeDataIntegrity(v *Volume, indexFile *os.File) (lastAppendAt
 			healthyIndexSize = indexSize - int64(i)*NeedleMapEntrySize
 			continue
 		}
-		if err != ErrSizeMismatch {
+		if err != ErrorSizeMismatch {
 			break
 		}
 	}
@@ -94,7 +94,7 @@ func verifyNeedleIntegrity(datFile backend.BackendStorageFile, v needle.Version,
 		return 0, fmt.Errorf("read %s at %d", datFile.Name(), offset)
 	}
 	if n.Size != size {
-		return 0, ErrSizeMismatch
+		return 0, ErrorSizeMismatch
 	}
 	if v == needle.Version3 {
 		bytes := make([]byte, TimestampSize)
diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index 7076e198b..98a5f3a5a 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -15,9 +15,9 @@ import (
 	. "github.com/chrislusf/seaweedfs/weed/storage/types"
 )
 
-var ErrNotFound = errors.New("not found")
-var ErrDeleted = errors.New("already deleted")
-var ErrSizeMismatch = errors.New("size mismatch")
+var ErrorNotFound = errors.New("not found")
+var ErrorDeleted = errors.New("already deleted")
+var ErrorSizeMismatch = errors.New("size mismatch")
 
 func (v *Volume) checkReadWriteError(err error) {
 	if err == nil {
@@ -289,7 +289,7 @@ func (v *Volume) readNeedle(n *needle.Needle, readOption *ReadOption) (int, erro
 
 	nv, ok := v.nm.Get(n.Id)
 	if !ok || nv.Offset.IsZero() {
-		return -1, ErrNotFound
+		return -1, ErrorNotFound
 	}
 	readSize := nv.Size
 	if readSize.IsDeleted() {
@@ -297,14 +297,14 @@ func (v *Volume) readNeedle(n *needle.Needle, readOption *ReadOption) (int, erro
 			glog.V(3).Infof("reading deleted %s", n.String())
 			readSize = -readSize
 		} else {
-			return -1, ErrDeleted
+			return -1, ErrorDeleted
 		}
 	}
 	if readSize == 0 {
 		return 0, nil
 	}
 	err := n.ReadData(v.DataBackend, nv.Offset.ToActualOffset(), readSize, v.Version())
-	if err == needle.ErrSizeMismatch && OffsetSize == 4 {
+	if err == needle.ErrorSizeMismatch && OffsetSize == 4 {
 		// add special handling for .dat larger than 32GB, from git commit comment of
 		// 06c15ab3 Chris Lu <chris.lu@gmail.com> on 2020/10/28 at 4:11 上
 		err = n.ReadData(v.DataBackend, nv.Offset.ToActualOffset()+int64(MaxPossibleVolumeSize), readSize, v.Version())
@@ -327,7 +327,7 @@ func (v *Volume) readNeedle(n *needle.Needle, readOption *ReadOption) (int, erro
 	if time.Now().Before(time.Unix(0, int64(n.AppendAtNs)).Add(time.Duration(ttlMinutes) * time.Minute)) {
 		return bytesRead, nil
 	}
-	return -1, ErrNotFound
+	return -1, ErrorNotFound
 }
 
 func (v *Volume) startWorker() {