From d4a2bcc9ac49d07c71822ce72b97861d5844b46d Mon Sep 17 00:00:00 2001 From: yuzou Date: Mon, 27 Jun 2016 14:04:04 +0800 Subject: [PATCH] Add detail error logs when 'Unknown Device' error happens if devicemapper storage is used. Signed-off-by: yuzou --- daemon/graphdriver/devmapper/deviceset.go | 2 ++ 1 file changed, 2 insertions(+) diff --git a/daemon/graphdriver/devmapper/deviceset.go b/daemon/graphdriver/devmapper/deviceset.go index 0e663b4e58..a2cb0c330e 100644 --- a/daemon/graphdriver/devmapper/deviceset.go +++ b/daemon/graphdriver/devmapper/deviceset.go @@ -901,10 +901,12 @@ func (devices *DeviceSet) loadMetadata(hash string) *devInfo { jsonData, err := ioutil.ReadFile(devices.metadataFile(info)) if err != nil { + logrus.Debugf("devmapper: Failed to read %s with err: %v", devices.metadataFile(info), err) return nil } if err := json.Unmarshal(jsonData, &info); err != nil { + logrus.Debugf("devmapper: Failed to unmarshal devInfo from %s with err: %v", devices.metadataFile(info), err) return nil }