fix(etcd): better error message when watcher cannot be created

zbindenren · zbindenren · commit befecf001fe6 · 2021-02-12T14:35:12.000+01:00
diff --git a/etcd/watch.go b/etcd/watch.go
@@ -54,7 +54,7 @@ func (e *Backend) Watch(key string, w store.Watcher, ops ...store.WatchOption) e
 		select {
 		case resp := <-rch:
 			if !resp.Created {
-				return fmt.Errorf("watch not created")
+				return fmt.Errorf("watch not created: %s", resp.Err())
 			}
 		case <-tCtx.Done():
 			return fmt.Errorf("watch not created, timeout of %v exceeded", timeout)

Original file line number	Diff line number	Diff line change
`@@ -54,7 +54,7 @@ func (e *Backend) Watch(key string, w store.Watcher, ops ...store.WatchOption) e`
`54`	`54`	`select {`
`55`	`55`	`case resp := <-rch:`
`56`	`56`	`if !resp.Created {`
`57`		`- return fmt.Errorf("watch not created")`
	`57`	`+ return fmt.Errorf("watch not created: %s", resp.Err())`
`58`	`58`	`}`
`59`	`59`	`case <-tCtx.Done():`
`60`	`60`	`return fmt.Errorf("watch not created, timeout of %v exceeded", timeout)`