error logging

weed/util/chunk_cache/chunk_cache.go

@@ -76,6 +76,8 @@ func (c *ChunkCache) SetChunk(fileId string, data []byte) {
 	c.Lock()
 	defer c.Unlock()
 
+	glog.V(4).Infof("SetChunk %s size %d\n", fileId, len(data))
+
 	c.doSetChunk(fileId, data)
 }
 

weed/util/chunk_cache/chunk_cache_on_disk.go

@@ -138,7 +138,7 @@ func (v *ChunkCacheVolume) WriteNeedle(key types.NeedleId, data []byte) error {
 	}
 
 	if err := v.nm.Put(key, types.ToOffset(offset), uint32(len(data))); err != nil {
-		glog.V(4).Infof("failed to save in needle map %d: %v", key, err)
+		return err
 	}
 
 	return nil

weed/util/chunk_cache/on_disk_cache_layer.go

@@ -54,7 +54,9 @@ func (c *OnDiskCacheLayer) setChunk(needleId types.NeedleId, data []byte) {
 		c.diskCaches[0] = t
 	}
 
-	c.diskCaches[0].WriteNeedle(needleId, data)
+	if err := c.diskCaches[0].WriteNeedle(needleId, data); err != nil {
+		glog.V(0).Infof("cache write %v size %d: %v", needleId, len(data), err)
+	}
 
 }