{"record":{"id":"ecd4cc5f4c67cc80","repo":"sipeed/picoclaw","slug":"failed-to-write-model-field-w","errorCode":null,"errorMessage":"failed to write model field: %w","messagePattern":"failed to write model field: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/audio/asr/whisper_transcriber.go","lineNumber":117,"sourceCode":"\t})\n\n\tvar requestBody bytes.Buffer\n\twriter := multipart.NewWriter(&requestBody)\n\n\tpart, err := writer.CreateFormFile(\"file\", filename)\n\tif err != nil {\n\t\tlogger.ErrorCF(\"voice\", \"Failed to create whisper form file\", map[string]any{\"error\": err})\n\t\treturn nil, fmt.Errorf(\"failed to create form file: %w\", err)\n\t}\n\n\tif _, copyErr := io.Copy(part, bytes.NewReader(data)); copyErr != nil {\n\t\tlogger.ErrorCF(\"voice\", \"Failed to copy whisper file content\", map[string]any{\"error\": copyErr})\n\t\treturn nil, fmt.Errorf(\"failed to copy file content: %w\", copyErr)\n\t}\n\n\tif err = writer.WriteField(\"model\", t.modelID); err != nil {\n\t\tlogger.ErrorCF(\"voice\", \"Failed to write whisper model field\", map[string]any{\"error\": err})\n\t\treturn nil, fmt.Errorf(\"failed to write model field: %w\", err)\n\t}\n\n\tif err = writer.WriteField(\"response_format\", \"json\"); err != nil {\n\t\tlogger.ErrorCF(\"voice\", \"Failed to write whisper response_format field\", map[string]any{\"error\": err})\n\t\treturn nil, fmt.Errorf(\"failed to write response_format field: %w\", err)\n\t}\n\n\tif err = writer.Close(); err != nil {\n\t\tlogger.ErrorCF(\"voice\", \"Failed to close whisper multipart writer\", map[string]any{\"error\": err})\n\t\treturn nil, fmt.Errorf(\"failed to close multipart writer: %w\", err)\n\t}\n\n\treturn t.doRequest(ctx, &requestBody, writer.FormDataContentType(), int64(len(data)))\n}\n\nfunc (t *WhisperTranscriber) Transcribe(ctx context.Context, audioFilePath string) (*TranscriptionResponse, error) {\n\tlogger.InfoCF(\"voice\", \"Starting whisper transcription\", map[string]any{\n\t\t\"audio_file\": audioFilePath,","sourceCodeStart":99,"sourceCodeEnd":135,"githubUrl":"https://github.com/sipeed/picoclaw/blob/49183d7e8daed0dba89ddbb6fcb60089401d9680/pkg/audio/asr/whisper_transcriber.go#L99-L135","documentation":"Thrown when writer.WriteField(\"model\", t.modelID) fails in WhisperTranscriber's multipart builder. WriteField appends a short constant-size field to an in-memory bytes.Buffer; failure means buffer allocation failure under memory exhaustion. Not input-dependent and not network-related.","triggerScenarios":"Severe memory pressure while a large audio payload is being buffered; otherwise unreachable.","commonSituations":"Memory-capped containers transcribing large files; same class as 306/314.","solutions":["Increase memory headroom or cap audio input size.","Profile memory: the multipart body duplicates the audio in RAM."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"if len(data) > maxInMemoryAudio { return errors.New(\"audio too large; multipart build may exhaust memory\") }","typeGuard":null,"tryCatchPattern":"if _, err := whisper.TranscribeWithData(ctx, data, name); err != nil {\n    // WriteField into bytes.Buffer: only OOM-class failures; shrink input or raise limits, do not blind-retry.\n    return err\n}","preventionTips":["Cap input size at intake; alert on memory pressure near transcription calls.","Keep a 2x-headroom rule between the memory limit and the largest accepted recording."],"tags":["memory","multipart","whisper","go"],"backgroundTag":null,"analyzedSha":"49183d7e8daed0dba89ddbb6fcb60089401d9680","analyzedAt":"2026-08-15T21:55:41.315Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}