{"record":{"id":"ea1e8c697da5e7f4","repo":"XTLS/Xray-core","slug":"failed-to-build-dns-configuration","errorCode":null,"errorMessage":"failed to build DNS configuration","messagePattern":"failed to build DNS configuration","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"infra/conf/xray.go","lineNumber":594,"sourceCode":"\t} else {\n\t\tlogConfMsg = serial.ToTypedMessage(DefaultLogConfig())\n\t}\n\t// let logger module be the first App to start,\n\t// so that other modules could print log during initiating\n\tconfig.App = append([]*serial.TypedMessage{logConfMsg}, config.App...)\n\n\tif c.RouterConfig != nil {\n\t\trouterConfig, err := c.RouterConfig.Build()\n\t\tif err != nil {\n\t\t\treturn nil, errors.New(\"failed to build routing configuration\").Base(err)\n\t\t}\n\t\tconfig.App = append(config.App, serial.ToTypedMessage(routerConfig))\n\t}\n\n\tif c.DNSConfig != nil {\n\t\tdnsApp, err := c.DNSConfig.Build()\n\t\tif err != nil {\n\t\t\treturn nil, errors.New(\"failed to build DNS configuration\").Base(err)\n\t\t}\n\t\tconfig.App = append(config.App, serial.ToTypedMessage(dnsApp))\n\t}\n\n\tif c.Policy != nil {\n\t\tpc, err := c.Policy.Build()\n\t\tif err != nil {\n\t\t\treturn nil, errors.New(\"failed to build policy configuration\").Base(err)\n\t\t}\n\t\tconfig.App = append(config.App, serial.ToTypedMessage(pc))\n\t}\n\n\tif c.Reverse != nil {\n\t\treturn nil, errors.PrintRemovedFeatureError(`\"legacy reverse\"`, `\"VLESS Reverse Proxy\"`)\n\t\tr, err := c.Reverse.Build()\n\t\tif err != nil {\n\t\t\treturn nil, errors.New(\"failed to build reverse configuration\").Base(err)\n\t\t}","sourceCodeStart":576,"sourceCodeEnd":612,"githubUrl":"https://github.com/XTLS/Xray-core/blob/7d214f8b094f75322fa3990f8aadad1c912f24f5/infra/conf/xray.go#L576-L612","documentation":"Error \"failed to build DNS configuration\" thrown in XTLS/Xray-core.","triggerScenarios":"Thrown at infra/conf/xray.go:594 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7d214f8b094f75322fa3990f8aadad1c912f24f5","analyzedAt":"2026-08-15T14:26:24.325Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}