Add tip about error message in registry cache (#3874)

2017-07-12 11:59:00 -07:00 · 2017-07-12 11:59:00 -07:00 · 82998e1077
parent b19b19cc70
commit 82998e1077
1 changed files with 5 additions and 0 deletions
--- a/docs/recipes/mirror.md
+++ b/docs/recipes/mirror.md
@ -103,6 +103,11 @@ to make the change persistent.

 Save the file and restart Docker for the change to take effect.

+> **Tip**: If you see a message in the log that reads,
+> `error statting local store, serving from upstream: unknown blob`, this isn't
+> an error in cache functionality. Instead, it's an informational message
+> telling you that the file doesn't exist yet in the local cache.
+
 ## Use case: the China registry mirror

 The URL of the registry mirror for China is `registry.docker-cn.com`. You can