{"record":{"id":"e1bd321f6b42657a","repo":"hasura/graphql-engine","slug":"unable-to-parse-introspection-query-0","errorCode":null,"errorMessage":"unable to parse introspection query: {0}","messagePattern":"unable to parse introspection query: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"v3/crates/graphql/lang-graphql/src/generate_graphql_schema.rs","lineNumber":13,"sourceCode":"/*\nThis module provides functions to generate introspection result as GraphQL schema\nfor each namespace from the schema.\n */\nuse json_ext;\nuse std::collections::BTreeMap;\nuse std::sync::OnceLock;\nuse tracing_util::SpanVisibility;\nuse tracing_util::{ErrorVisibility, TraceableError};\n\n#[derive(Debug, thiserror::Error)]\npub enum Error {\n    #[error(\"unable to parse introspection query: {0}\")]\n    ParseIntrospectionQuery(String),\n    #[error(\"unable to normalize introspection query: {0}\")]\n    NormalizeIntrospectionQuery(String),\n    #[error(\"unable to find field call\")]\n    FieldCallNotFound,\n    #[error(\"Only __schema field is expected but found: {name:}\")]\n    OnlySchemaFieldExpected { name: String },\n    #[error(\"introspection query failed: {0}\")]\n    IntrospactionQueryError(#[from] crate::introspection::Error),\n    #[error(\"unable to serialize to json: {0}\")]\n    SerializeJson(#[from] serde_json::Error),\n}\nimpl TraceableError for Error {\n    fn visibility(&self) -> ErrorVisibility {\n        ErrorVisibility::User\n    }\n}\n","sourceCodeStart":1,"sourceCodeEnd":31,"githubUrl":"https://github.com/hasura/graphql-engine/blob/724551b9ae87845594ef0408cff0e50eb6c90dc5/v3/crates/graphql/lang-graphql/src/generate_graphql_schema.rs#L1-L31","documentation":"The internally-generated introspection query failed to parse with the GraphQL parser. This is an engine-side error: the fixed introspection query text could not be parsed, which normally signals a parser regression or corrupted build rather than user input.","triggerScenarios":"Executing an introspection request (e.g. GraphiQL/IDE loading the schema) where the hardcoded introspection query fails to lex/parse; parser and query-template version mismatch inside the engine.","commonSituations":"Mixing crate versions after a partial upgrade; a bug in a custom fork of the parser; essentially never caused by end-user queries.","solutions":["Upgrade the engine/lang-graphql crates to consistent versions","If you maintain a fork, diff the introspection query template against the parser's grammar","Report the issue with the parse error string if using stock releases"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"// Internal error: retry once; if persistent, upgrade/report","preventionTips":["Keep engine crate versions consistent","Pin releases from a single version set"],"tags":["graphql","introspection","parser","internal"],"backgroundTag":"graphql-parse-error","analyzedSha":"724551b9ae87845594ef0408cff0e50eb6c90dc5","analyzedAt":"2026-08-28T07:32:55.105Z","schemaVersion":2},"datasetVersion":"2026-08-28T11:17:15.048Z"}