guard the conversion

agent/agent.go

@@ -4669,12 +4669,15 @@ func (a *Agent) persistServerMetadata() {
 				continue
 			}
 
-			sf := f.(*safeio.File)
+			// Use safeio.File to ensure the file is written to disk atomically
+			if sf, ok := f.(*safeio.File); ok {
 				if err := sf.Commit(); err != nil {
+					sf.Close()
 					a.logger.Error("failed to commit server metadata", "error", err)
 					continue
 				}
-			sf.Close()
+			}
+			f.Close()
 		case <-a.shutdownCh:
 			return
 		}