{"record":{"id":"43d13348eb9f7485","repo":"GoogleContainerTools/skaffold","slug":"marshalling-event-w","errorCode":null,"errorMessage":"marshalling event: %w","messagePattern":"marshalling event: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/skaffold/event/event.go","lineNumber":848,"sourceCode":"\n// SaveEventsToFile saves the current event log to the filepath provided\nfunc SaveEventsToFile(fp string) error {\n\thandler.logLock.Lock()\n\t// Ensure that the filepath provided has the directories available when attemping to save the file.\n\tdir := filepath.Dir(fp)\n\tif err := os.MkdirAll(dir, 0700); err != nil {\n\t\treturn fmt.Errorf(\"unable to create directory %q: %w\", dir, err)\n\t}\n\tf, err := os.OpenFile(fp, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"opening %s: %w\", fp, err)\n\t}\n\tdefer f.Close()\n\tmarshaller := jsonpb.Marshaler{}\n\tfor _, ev := range handler.eventLog {\n\t\tcontents := bytes.NewBuffer([]byte{})\n\t\tif err := marshaller.Marshal(contents, ev); err != nil {\n\t\t\treturn fmt.Errorf(\"marshalling event: %w\", err)\n\t\t}\n\t\tif _, err := f.WriteString(contents.String() + \"\\n\"); err != nil {\n\t\t\treturn fmt.Errorf(\"writing string: %w\", err)\n\t\t}\n\t}\n\thandler.logLock.Unlock()\n\treturn nil\n}\n","sourceCodeStart":830,"sourceCodeEnd":857,"githubUrl":"https://github.com/GoogleContainerTools/skaffold/blob/a1189de023efc32d4b8e11f395acc678aa555011/pkg/skaffold/event/event.go#L830-L857","documentation":"Each event in the handler's eventLog is serialized to JSON via a jsonpb.Marshaler before being written. If marshalling any event fails, the loop aborts with 'marshalling event: %w'. This indicates an event in the log cannot be converted to its protobuf JSON representation.","triggerScenarios":"An event proto in handler.eventLog fails jsonpb marshalling — typically due to a malformed or nil internal message, or a proto type mismatch after version mixing between event producers.","commonSituations":"Mixing skaffold versions/components that produce incompatible event protos in the same session; a nil sub-message registered in the event log; a nil event entry in the log.","solutions":["Report the wrapped inner error upstream — a valid event should always marshal; inspect which event index fails","Restart the skaffold session to rebuild a clean event log","Ensure all skaffold components (binary, plugins) are the same version","If in a fork, verify custom event types are registered with the JSONPB marshaller"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"for _, ev := range handler.eventLog {\n    if ev == nil {\n        return fmt.Errorf(\"nil event in log\")\n    }\n}","typeGuard":null,"tryCatchPattern":"if err := SaveEventsToFile(fp); err != nil {\n    if strings.Contains(err.Error(), \"marshalling event\") {\n        log.Warnf(\"event log contains unmarshallable events; skipping save: %v\", err)\n        return nil\n    }\n    return err\n}","preventionTips":["Keep all skaffold components on the same version to avoid proto mismatches","Never insert nil or partially-initialized events into the log","Add a debug dump of the failing event when marshalling fails","Regenerate proto bindings after upgrading protobuf/gogo versions"],"tags":["events","serialization","protobuf"],"backgroundTag":"json-marshalling-failed","analyzedSha":"a1189de023efc32d4b8e11f395acc678aa555011","analyzedAt":"2026-09-05T12:09:27.064Z","contentChangedAt":"2026-09-05T12:09:27.064Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}