Some users reporting checksums don't match and "no message cache" on recovery.

Signed-off-by: Derek Collison <derek@nats.io>

server/filestore.go

@@ -315,6 +315,11 @@ func newFileStoreWithCreated(fcfg FileStoreConfig, cfg StreamConfig, created tim
 	// Always track per subject information.
 	fs.tms = true
 
+	// Recover our message state.
+	if err := fs.recoverMsgs(); err != nil {
+		return nil, err
+	}
+
 	// Write our meta data iff does not exist.
 	meta := path.Join(fcfg.StoreDir, JetStreamMetaFile)
 	if _, err := os.Stat(meta); err != nil && os.IsNotExist(err) {
@@ -323,11 +328,6 @@ func newFileStoreWithCreated(fcfg FileStoreConfig, cfg StreamConfig, created tim
 		}
 	}
 
-	// Recover our message state.
-	if err := fs.recoverMsgs(); err != nil {
-		return nil, err
-	}
-
 	// If we expect to be encrypted check that what we are restoring is not plaintext.
 	// This can happen on snapshot restores or conversions.
 	if fs.prf != nil {
@@ -4430,6 +4430,9 @@ func (mb *msgBlock) generatePerSubjectInfo() error {
 			if err == ErrStoreMsgNotFound || err == errDeletedMsg {
 				continue
 			}
+			if err == errNoCache {
+				return nil
+			}
 			return err
 		}
 		if sm != nil && len(sm.subj) > 0 {