{"record":{"id":"f2079fa3d539b3cc","repo":"elastic/elasticsearch","slug":"failed-to-build-mappings-for","errorCode":null,"errorMessage":"Failed to build mappings for {}","messagePattern":"Failed to build mappings for (.+?)","errorType":"exception","errorClass":"UncheckedIOException","httpStatus":null,"severity":"error","filePath":"modules/ip-location/src/main/java/org/elasticsearch/ingest/geoip/IngestGeoIpPlugin.java","lineNumber":350,"sourceCode":"                .field(\"version\", LEGACY_VERSION_FIELD_VALUE)\n                .field(SystemIndexDescriptor.VERSION_META_KEY, GEOIP_INDEX_MAPPINGS_VERSION)\n                .endObject()\n                .field(\"dynamic\", \"strict\")\n                .startObject(\"properties\")\n                .startObject(\"name\")\n                .field(\"type\", \"keyword\")\n                .endObject()\n                .startObject(\"chunk\")\n                .field(\"type\", \"integer\")\n                .endObject()\n                .startObject(\"data\")\n                .field(\"type\", \"binary\")\n                .endObject()\n                .endObject()\n                .endObject()\n                .endObject();\n        } catch (IOException e) {\n            throw new UncheckedIOException(\"Failed to build mappings for \" + DATABASES_INDEX, e);\n        }\n    }\n\n    @Override\n    public void reload(Settings settings) {\n        enterpriseGeoIpDownloaderTaskExecutor.reload(settings);\n    }\n}\n","sourceCodeStart":332,"sourceCodeEnd":359,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/ip-location/src/main/java/org/elasticsearch/ingest/geoip/IngestGeoIpPlugin.java#L332-L359","documentation":"Thrown by IngestGeoIpPlugin while serializing the hardcoded index mappings for the .geoip databases index using an XContentBuilder. The builder writes are pure in-memory string building and should never raise IOException in practice; if one occurs it is wrapped in UncheckedIOException. This is effectively an unreachable defensive guard around the mapping construction.","triggerScenarios":"Building DATABASES_INDEX mappings via XContentBuilder; any IOException from the builder (theoretically impossible for in-memory builders) is caught and wrapped.","commonSituations":"Should never occur in production. If it does, suspect a custom/buggy XContent implementation on the classpath or an OOM during allocation of the builder buffer.","solutions":["Treat as a programming/classpath defect: capture the wrapped IOException cause and report it.","Ensure no third-party XContent override is present on the classpath.","Rule out heap exhaustion (increase heap or reduce concurrent mapping builds)."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"// defensive only; if this fires, inspect the wrapped IOException cause\ntry {\n    plugin.createMappings();\n} catch (UncheckedIOException e) {\n    logger.error(\"unexpected failure building geoip index mappings\", e.getCause());\n    throw e;\n}","preventionTips":["Treat occurrence as a classpath/heap defect; capture the wrapped cause.","Do not place custom XContent implementations on the classpath.","Ensure adequate heap for mapping construction.","Add a regression test that exercises the mapping builder."],"tags":["geoip","mappings","xcontent","defensive"],"backgroundTag":null,"analyzedSha":"db6a809a667c081ca1dc7500389d26975573215f","analyzedAt":"2026-08-12T01:39:14.192Z","schemaVersion":2},"datasetVersion":"2026-08-12T12:31:55.035Z"}