{"record":{"id":"e0daa7fc5e283caf","repo":"windmill-labs/windmill","slug":"e-slack-chat-update-request-error-propagated-via","errorCode":null,"errorMessage":"e (Slack chat.update request error propagated via anyhow)","messagePattern":"e \\(Slack chat\\.update request error propagated via anyhow\\)","errorType":"http","errorClass":null,"httpStatus":null,"severity":"error","filePath":"backend/windmill-api/src/slack_approvals.rs","lineNumber":1228,"sourceCode":"\n    let payload = serde_json::json!({\n        \"channel\": container.channel_id,\n        \"ts\": container.message_ts,\n        \"text\": message,\n        \"blocks\": final_blocks,\n        \"mrkdwn\": true // Enable markdown to support emojis\n    });\n\n    let client = Client::new();\n\n    let response = client\n        .post(\"https://slack.com/api/chat.update\")\n        .bearer_auth(token) // Use the token for authentication\n        .header(\"Content-Type\", \"application/json\")\n        .json(&payload)\n        .send()\n        .await\n        .map_err(|e| Error::from(anyhow::Error::new(e)))?;\n\n    if response.status().is_success() {\n        tracing::debug!(\"Slack message updated successfully!\");\n    } else {\n        tracing::error!(\n            \"Failed to update Slack message. Status: {}, Response: {:?}\",\n            response.status(),\n            response\n                .text()\n                .await\n                .map_err(|e| Error::from(anyhow::Error::new(e)))?\n        );\n    }\n\n    Ok(())\n}\n","sourceCodeStart":1210,"sourceCodeEnd":1245,"githubUrl":"https://github.com/windmill-labs/windmill/blob/e474e8803ce2ff5c2df09a58dab51d45f5c922ca/backend/windmill-api/src/slack_approvals.rs#L1210-L1245","documentation":"`update_original_slack_message` edits the original approval/interactivity message in Slack via `POST https://slack.com/api/chat.update`. Network or transport failures on `.send()` (DNS failure, connection reset, timeout) are propagated as anyhow errors wrapping the reqwest error. Note: HTTP-level errors from Slack's API (non-2xx responses with an `error` body like `message_not_found` or `invalid_auth`) are logged, not thrown — this specific error is the request-level failure path.","triggerScenarios":"A Slack form submission handler (`handle_submission`) tries to update the original message but the HTTPS request to Slack fails at the transport layer: no outbound network access, DNS resolution failure, TLS issues, or Slack returning a 5xx/timeout at the connection level.","commonSituations":"Self-hosted Windmill instances without internet egress, firewalls/proxies blocking slack.com, transient Slack outages, DNS misconfiguration in containers.","solutions":["Verify the worker/API server has outbound HTTPS access to slack.com (curl https://slack.com/api/api.test from the host)","Check corporate proxy/firewall rules and set HTTPS_PROXY if required","Retry the submission — transport errors to Slack are often transient","Confirm the failure is transport-level (this error) vs a Slack API error (logged, e.g. invalid token), and check token validity for the latter"],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// preflight: can the server reach Slack?\nconst ok = await fetch(\"https://slack.com/api/api.test\").then(r => r.ok).catch(() => false);\nif (!ok) throw new Error(\"No outbound access to slack.com\");","typeGuard":null,"tryCatchPattern":"try {\n  await updateOriginalSlackMessage(...);\n} catch (e) {\n  // transport-level failure: check egress/proxy, then retry with backoff\n  await backoff(() => updateOriginalSlackMessage(...), 3);\n}","preventionTips":["Ensure self-hosted instances have outbound HTTPS to slack.com","Configure HTTPS_PROXY where corporate egress requires it","Retry transient network failures with backoff","Distinguish transport errors (thrown) from Slack API errors (logged, e.g. invalid_auth) when debugging"],"tags":["slack","network","http","reqwest"],"backgroundTag":"connection-refused","analyzedSha":"e474e8803ce2ff5c2df09a58dab51d45f5c922ca","analyzedAt":"2026-09-03T12:38:19.024Z","contentChangedAt":"2026-09-03T12:38:19.024Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}