{"record":{"id":"6f375061f474442b","repo":"GoogleChrome/lighthouse","slug":"tracing-already-started","errorCode":"TRACING_ALREADY_STARTED","errorMessage":"An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.","messagePattern":"An internal Chrome error occurred\\. Please restart Chrome and try re-running Lighthouse\\.","errorType":"error_code","errorClass":"LighthouseError","httpStatus":null,"severity":"error","filePath":"core/lib/lh-error.js","lineNumber":363,"sourceCode":"    message: UIStrings.pageLoadFailedInterstitial,\n    lhrRuntimeError: true,\n  },\n  /* Used when the page stopped responding and did not finish loading. */\n  PAGE_HUNG: {\n    code: 'PAGE_HUNG',\n    message: UIStrings.pageLoadFailedHung,\n    lhrRuntimeError: true,\n  },\n  /* Used when the page is non-HTML. */\n  NOT_HTML: {\n    code: 'NOT_HTML',\n    message: UIStrings.notHtml,\n    lhrRuntimeError: true,\n  },\n\n  // Protocol internal failures\n  TRACING_ALREADY_STARTED: {\n    code: 'TRACING_ALREADY_STARTED',\n    message: UIStrings.internalChromeError,\n    pattern: /Tracing.*started/,\n    lhrRuntimeError: true,\n  },\n  PARSING_PROBLEM: {\n    code: 'PARSING_PROBLEM',\n    message: UIStrings.internalChromeError,\n    pattern: /Parsing problem/,\n    lhrRuntimeError: true,\n  },\n  READ_FAILED: {\n    code: 'READ_FAILED',\n    message: UIStrings.internalChromeError,\n    pattern: /Read failed/,\n    lhrRuntimeError: true,\n  },\n\n  // URL parsing failures","sourceCodeStart":345,"sourceCodeEnd":381,"githubUrl":"https://github.com/GoogleChrome/lighthouse/blob/9515cd4e58ebed69f78742d932b501c2cab8ad8f/core/lib/lh-error.js#L345-L381","documentation":"Error \"An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.\" thrown in GoogleChrome/lighthouse.","triggerScenarios":"Raised on an internal Chrome failure (e.g. target crashed or closed) during the run.","commonSituations":"See trigger scenarios.","solutions":["Restart Chrome and re-run Lighthouse.","Update Chrome to the latest version.","Close other tabs and applications to free system resources."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"9515cd4e58ebed69f78742d932b501c2cab8ad8f","analyzedAt":"2026-08-13T06:28:10.346Z","schemaVersion":2},"datasetVersion":"2026-08-13T09:17:06.757Z"}