Internal Server Error
","messagePattern":"Internal Server Error
","errorType":"http","errorClass":null,"httpStatus":500,"severity":"error","filePath":"packages/gatsby/src/utils/page-ssr-module/lambda.ts","lineNumber":535,"sourceCode":" req?.rawUrl ? new URL(req.rawUrl).origin : cdnDatastoreOrigin\n ),\n req,\n })\n\n if (isPageData) {\n const results = await renderPageData({ data })\n setStatusAndHeaders({ page, data, res })\n res.json(results)\n return\n } else {\n const results = await renderHTML({ data })\n setStatusAndHeaders({ page, data, res })\n res.send(results)\n return\n }\n } catch (e) {\n console.error(`Engine failed to handle request`, e)\n res.status(500).send(getErrorBody(500))\n }\n}\n\nexport default engineHandler\n","sourceCodeStart":517,"sourceCodeEnd":540,"githubUrl":"https://github.com/gatsbyjs/gatsby/blob/8cffb8f412653a717042ec4de85038b4f2edd5e8/packages/gatsby/src/utils/page-ssr-module/lambda.ts#L517-L540","documentation":"Top-level catch of engineHandler: rendering the page or page-data threw (query failure, SSR error, datastore issue). The error is logged as 'Engine failed to handle request' and a minimal HTML 500 body is sent so the CDN/platform sees a proper server error.","triggerScenarios":"Thrown at packages/gatsby/src/utils/page-ssr-module/lambda.ts:517 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Inspect the logged engine error and stack for the failing page","Re-run the page's query locally to reproduce","Fix the SSR/rendering error in the page component"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"8cffb8f412653a717042ec4de85038b4f2edd5e8","analyzedAt":"2026-08-26T17:50:09.662Z","contentChangedAt":"2026-08-26T17:50:09.662Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}