Tencent/WeKnora · error

get chat model: %w

Error message

get chat model: %w

What it means

Thrown when modelService.GetChatModel fails to resolve the chat model configured for summarization (kb summary model). Model resolution failures share the same retry budget and terminal first-chunk fallback as LLM request failures.

Source

Thrown at internal/application/service/knowledge_process.go:1223

			logger.Errorf(ctx, "Failed to save terminal summary fallback: %v", updateErr)
			summaryErr = updateErr
			return fmt.Errorf("save terminal summary fallback: %w", updateErr)
		}
		if fallback == "" {
			summaryOut["fallback"] = "empty"
		} else {
			summaryOut["fallback"] = "first_chunk"
		}
		summaryOut["fallback_chars"] = len([]rune(fallback))
		return fmt.Errorf("summary generation exhausted retries: %w", generationErr)
	}

	// Initialize chat model for summary. Model resolution failures use the same
	// retry budget and terminal first-chunk fallback as LLM request failures.
	chatModel, err := s.modelService.GetChatModel(ctx, kb.SummaryModelID)
	if err != nil {
		logger.Errorf(ctx, "Failed to get chat model: %v", err)
		return handleRetryableSummaryFailure(fmt.Errorf("get chat model: %w", err))
	}

	// Generate summary
	summary, err := s.getSummary(ctx, chatModel, knowledge, textChunks)
	if err != nil {
		logger.Errorf(ctx, "Failed to generate summary for knowledge %s: %v", payload.KnowledgeID, err)
		// Surface the underlying LLM/IO error on the span so the trace UI
		// can explain "why did this stage take 60s and then fall back?"
		// without forcing the operator to grep worker logs. We also capture
		// the error type to disambiguate timeouts from upstream HTTP errors
		// (deadline exceeded vs unexpected EOF vs 5xx, etc.).
		summaryOut["error"] = previewText(err.Error(), 500)
		summaryOut["error_type"] = fmt.Sprintf("%T", err)
		// For the insufficient-content case (scanned PDF without OCR, etc.)
		// we deliberately do NOT fall back to the first chunk's raw content,
		// since that chunk is typically just a bare markdown image reference
		// and surfacing it in the description is misleading.
		if errors.Is(err, errInsufficientSummaryContent) {

View on GitHub (pinned to 988cbb0330)

Solutions

1. Verify the summary model ID exists and is enabled for the tenant
2. Check model provider credentials/configuration
3. After fixing config, retry summary generation; fallback keeps knowledge usable meanwhile

When it happens

Trigger: Thrown at internal/application/service/knowledge_process.go:1223 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Tencent/WeKnora@988cbb0330 (2026-09-02). Data as JSON: /api/errors/ceeb81577bd62006. Report an issue: GitHub.