{"record":{"id":"2efa37377e5df34a","repo":"vxcontrol/pentagi","slug":"failed-to-execute-search-after-d-attempts-w","errorCode":null,"errorMessage":"failed to execute search after %d attempts: %w","messagePattern":"failed to execute search after (.+?) attempts: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"backend/pkg/tools/searchers/duckduckgo.go","lineNumber":162,"sourceCode":"\n\t// Execute request with retry logic\n\tvar response *searchResponse\n\tfor attempt := 0; attempt < duckduckgoMaxRetries; attempt++ {\n\t\treq, err := http.NewRequestWithContext(ctx, \"POST\", duckduckgoSearchURL, strings.NewReader(formData))\n\t\tif err != nil {\n\t\t\treturn \"\", fmt.Errorf(\"failed to create search request: %w\", err)\n\t\t}\n\n\t\t// Add necessary headers for POST request\n\t\treq.Header.Set(\"User-Agent\", duckduckgoUserAgent)\n\t\treq.Header.Set(\"Content-Type\", \"application/x-www-form-urlencoded\")\n\t\treq.Header.Set(\"Accept\", \"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\")\n\t\treq.Header.Set(\"Accept-Language\", \"en-US,en;q=0.9\")\n\n\t\tresp, err := client.Do(req)\n\t\tif err != nil {\n\t\t\tif attempt == duckduckgoMaxRetries-1 {\n\t\t\t\treturn \"\", fmt.Errorf(\"failed to execute search after %d attempts: %w\", duckduckgoMaxRetries, err)\n\t\t\t}\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn \"\", ctx.Err()\n\t\t\tcase <-time.After(time.Second):\n\t\t\t}\n\t\t\tcontinue\n\t\t}\n\n\t\tif resp.StatusCode != http.StatusOK {\n\t\t\tresp.Body.Close()\n\t\t\tif attempt == duckduckgoMaxRetries-1 {\n\t\t\t\treturn \"\", fmt.Errorf(\"unexpected status code: %d\", resp.StatusCode)\n\t\t\t}\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn \"\", ctx.Err()\n\t\t\tcase <-time.After(time.Second):","sourceCodeStart":144,"sourceCodeEnd":180,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/searchers/duckduckgo.go#L144-L180","documentation":"The POST to DuckDuckGo failed on every one of duckduckgoMaxRetries attempts; on the final attempt the last transport error is wrapped and returned. Transient failures between attempts sleep 1s (or return ctx.Err() if the context is cancelled). Upstream, Handle classifies this as Fatal so the orchestrator falls back to the next engine.","triggerScenarios":"client.Do returns an error on all retries: DNS resolution failure, TCP connect refused/timeout, TLS handshake failure, context deadline exceeded while the request is in flight on the last attempt, or proxy unreachable.","commonSituations":"Container has no internet or broken DNS; corporate firewall blocks duckduckgo.com; DuckDuckGo rate-limits/blocks your IP leading to connection resets; http client timeout (duckduckgoTimeout) too short on a slow link; proxy misconfigured.","solutions":["Read the wrapped cause (e.g. 'dial tcp ... i/o timeout', 'no such host', 'connection refused') and fix the underlying network/DNS/proxy issue.","Confirm egress from the container: `docker exec <c> wget -qO- https://duckduckgo.com` to isolate host vs container networking.","Increase duckduckgoTimeout or retry backoff if failures are borderline timeouts on slow networks.","Ensure a fallback engine (Google, Tavily, etc.) is configured so web_search still returns results."],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// check egress before issuing searches\nctx, cancel := context.WithTimeout(ctx, 5*time.Second)\ndefer cancel()\nif err := checkConnectivity(ctx, \"https://duckduckgo.com\"); err != nil {\n    // engine unavailable; skip to fallback engine\n}","typeGuard":"var netErr net.Error\nif errors.As(err, &netErr) && netErr.Timeout() {\n    // transient timeout; safe to retry with backoff\n}","tryCatchPattern":"result, err := d.search(ctx, query, numResults)\nif err != nil {\n    if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {\n        return \"\", err // don't wrap cancellation\n    }\n    return \"\", Fatal(fmt.Errorf(\"duckduckgo search failed: %w\", err))\n}","preventionTips":["Set a sane client timeout (duckduckgoTimeout) matched to worst-case network latency","Use exponential backoff between retries instead of fixed 1s","Verify container DNS and proxy settings during deployment","Monitor wrapped cause strings to distinguish DNS vs connect vs TLS failures"],"tags":["network","timeout","dns","duckduckgo"],"backgroundTag":"request-timeout","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}