From 09874f0d16f60cec9cbce0108c4efa2c40d4786c Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Wed, 9 Oct 2019 00:02:50 -0700
Subject: [PATCH] volume: return error if superblock is not initialized

fix https://github.com/chrislusf/seaweedfs/issues/1079
---
 weed/storage/volume_loading.go     | 3 +++
 weed/storage/volume_super_block.go | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/weed/storage/volume_loading.go b/weed/storage/volume_loading.go
index 0b6021ca8..19a45c842 100644
--- a/weed/storage/volume_loading.go
+++ b/weed/storage/volume_loading.go
@@ -59,6 +59,9 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 	if alreadyHasSuperBlock {
 		e = v.readSuperBlock()
 	} else {
+		if !v.SuperBlock.Initialized() {
+			return fmt.Errorf("volume %s.dat not initialized", fileName)
+		}
 		e = v.maybeWriteSuperBlock()
 	}
 	if e == nil && alsoLoadIndex {
diff --git a/weed/storage/volume_super_block.go b/weed/storage/volume_super_block.go
index 164c887e1..d0f2757fa 100644
--- a/weed/storage/volume_super_block.go
+++ b/weed/storage/volume_super_block.go
@@ -69,6 +69,10 @@ func (s *SuperBlock) Bytes() []byte {
 	return header
 }
 
+func (s *SuperBlock) Initialized() bool {
+	return s.ReplicaPlacement == nil || s.Ttl == nil
+}
+
 func (v *Volume) maybeWriteSuperBlock() error {
 	stat, e := v.dataFile.Stat()
 	if e != nil {