domain: fix a data race (pingcap#2397)

sidneychen · Jan 5, 2017 · a3b5a48 · a3b5a48
1 parent a44d9c3
commit a3b5a48
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/domain/schema_validator.go b/domain/schema_validator.go
@@ -88,7 +88,10 @@ func (s *schemaValidator) Check(txnTS uint64, schemaVer int64) bool {
 
 // Latest returns the latest schema version it knows.
 func (s *schemaValidator) Latest() int64 {
-	return s.latestSchemaVer
+	s.mux.RLock()
+	ret := s.latestSchemaVer
+	s.mux.RUnlock()
+	return ret
 }
 
 func extractPhysicalTime(ts uint64) time.Time {