ErrLookup › OpenAPITools/openapi-generator
OpenAPITools/openapi-generator
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3) · Java · 493 source files
Analyzed at fcec517be3 on 2026-08-22. 183 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Can't instantiate config class with name | exception | error | java, openapi-generator, custom-generator, reflection, classpath, code-generator |
| Unknown schema type found in normalizer | exception | error | openapi-generator, openapi, schema, normalizer, null-safety |
| useJackson3 is only supported for the 'native'… | exception | error | java, openapi-generator, code-generation, jackson, configuration, option-validation |
| Cannot automatically set the API key from the… | panic | error | rust, authentication, api-key, security-scheme, codegen, generated-code |
| Failed to create the folder " + parent.getAbsolutePath() +… | exception | error | openapi-generator, maven, filesystem, permissions, checksum, parallel-builds |
| Failed to instantiate custom NORMALIZER_CLASS | exception | error | openapi-generator, reflection, custom-normalizer, constructor, java |
| Pattern must follow the Perl /pattern/modifiers convention. | exception | error | regex, openapi-spec, python, pattern-validation |
| Invalid model property naming | exception | error | openapi-generator, javascript, apollo, configuration, naming |
| Could not process model | exception | error | openapi-generator, openapi, schema, model, yaml, code-generation |
| Unsupported target supplied. | http | warning | http-404, generator-name, classpath, code-gen-config-loader, openapi-generator-online |
| Target files must be generated within the output directory… | exception | critical | openapi-generator, path-traversal, security, filesystem, custom-generator |
| description not found in the available values. | exception | error | openapi-generator, java, enum-lookup, illegal-argument, case-sensitivity |
| Input: ` `. Error | exception | error | openapi, normalizer, filter-syntax, configuration, illegal-argument |
| The [ ] Documentation Provider is not supported by this… | exception | error | kotlin, spring, documentation-provider, springdoc, additional-properties, openapi-generator, config-validation |
| The OpenAPI specification supplied was not valid | http | error | http-400, openapi-spec, swagger-parser, url-unreachable, openapi-generator-online |
| file suffix only allows '.', '-' and alphanumeric… | exception | error | typescript, nestjs, codegen, config-validation, file-naming |
| Failed to generate .openapi-generator-ignore when the… | exception | error | openapi-generator, io, filesystem, ignore-file, permissions |
| The given HTTP status code | exception | error | spring, java, http-status, openapi, codegen |
| Could not generate model | exception | error | openapi-generator, template, mustache, io, model, code-generation |
| Not implemented | exception | error | java, helidon, openapi-generator, bean-validation, unsupported-feature, configuration |
| Unreferenced enum | exception | error | ocaml, enum, inline-schema, dollar-ref, openapi-spec, openapi-generator, spec-validation |
| Invalid value for additional property… | exception | error | kotlin, spring, http-interface, reactive, coroutines, enum-value, openapi-generator, config-validation |
| Failed to load custom NORMALIZER_CLASS | exception | error | openapi-generator, classpath, reflection, custom-normalizer, maven-plugin |
| Empty database/table/column name for property | exception | error | ktorm, database-schema, identifier, sanitization, openapi-spec, openapi-generator, spec-validation |
| Could not generate supporting file | exception | error | openapi-generator, io, filesystem, metadata, permissions |
| Code generation failed. See above for the full exception. | exception | error | openapi-generator, maven, wrapper-exception, code-generation, diagnostics |
| swagger1AnnotationLibrary is not supported with Spring Boot… | exception | error | kotlin, spring, swagger, jakarta-ee, spring-boot-3, annotation-library, option-combination, openapi-generator, config-validation |
| Unable to locate /java-helidon/common/Status.java to… | exception | error | java, helidon, openapi-generator, classpath, packaging, shaded-jar, environment |
| Could not process operation: Tag | exception | error | openapi-generator, openapi, operation, schema, code-generation |
| File not found | http | error | http-404, file-not-found, one-shot-download, tmp-cleanup, openapi-generator-online |
| schema cannot be null with ref | exception | error | openapi, unresolved-ref, all-of, components, normalizer |
| is an invalid enum property naming option. Please choose… | exception | error | openapi-generator, java, micronaut, configuration, serialization, jackson |
| Error preparing constraint for version expression | exception | error | java, helidon, openapi-generator, version-management, maven, version-range |
| useJackson3 requires serializationLibrary=jackson | exception | error | openapi-generator, kotlin, jackson, serialization, configuration |
| Unable to build target: " + e.getMessage() | http | error | http-400, code-generation, catch-all, template-engine, openapi-generator-online |
| Flag 'useJakartaSecurityAnnotations' requires… | exception | error | java, jaxrs, quarkus, openapi-generator, jakarta-ee, security, annotations, configuration |
| Unknown library option | exception | error | java, helidon, openapi-generator, code-generation, library-selection, configuration |
| must be a valid… | exception | error | jackson, spring, vendor-extension, codegen, validation |
| must be one of [NON_NULL, NON_EMPTY, NON_DEFAULT, NONE] but… | exception | error | jackson, spring, codegen, config-validation |
| Failed to cache configuration | exception | error | php, mezzio, config-cache, permissions, generated-code |
| File not found or has expired | http | warning | http-404, download-link, ttl-expiry, in-memory-state, openapi-generator-online |
| missing config! | exception | error | openapi-generator, programmatic-usage, api-misuse, java |
| cacheScope requires 'key|content' or 'key\ncontent' | exception | error | mustache, template, csharp, codegen, cache-lambda |
| Couldn't load template engine adapter | exception | error | openapi, templating-engine, classpath, spi, configuration |
| Word ' ' could not be escaped. | exception | error | java, codegen, string-escaping, naming, edge-case |
| Error! oneOf schema is not of the type Schema | exception | error | openapi-generator, openapi, oneof, schema, normalizer |
| Unknown CasingType | validation | error | rust, openapi-generator, internal, defensive-code |
| Error! allOf schema is not of the type Schema | exception | error | openapi-generator, openapi, allof, schema, normalizer |
| Issues with the OpenAPI input. Possible causes… | exception | error | openapi-generator, programmatic-usage, api-misuse, java |
| The Annotation Library | exception | error | kotlin, spring, annotation-library, swagger, additional-properties, openapi-generator, config-validation |
| Could not generate api file for | exception | error | openapi-generator, openapi, api, tag, code-generation |
| is an invalid enum property naming option. Please choose… | exception | error | xojo, serialization, codegen, config-validation |
| property in model uses generated Python member name | exception | error | python, codegen, naming, name-collision, openapi-generator |
| Unable to deserialize config file | exception | error | openapi, config-file, json, yaml, deserialization |
| No valid specifications found to merge | exception | error | openapi, spec-merge, parse-error, yaml, json |
| Error! Failed to process getPydanticType when getting the… | exception | error | pydantic, python, request-body, openapi-spec |
| Multiplatform only supports string and kotlinx-datetime… | exception | error | kotlin, multiplatform, date-library, additional-properties, openapi-generator, config-validation |
| Helidon version uses the prefix for EE dependencies but… | exception | error | java, helidon, openapi-generator, jakarta-ee, javax, maven, configuration, option-validation |
| The [returnJBossResponse] requires [useJakartaEe] to be… | exception | error | java, jaxrs, quarkus, openapi-generator, jakarta-ee, resteasy, configuration |
| You cannot combine [returnResponse] and… | exception | error | java, jaxrs, quarkus, openapi-generator, resteasy, configuration, mutually-exclusive |
| Cannot merge specs where some declare an OpenAPI version… | exception | error | openapi, spec-merge, version-mismatch, validation |
| Generated field number is in reserved range (19000, 19999). | exception | error | protobuf, codegen, field-number, hash-collision, openapi-generator |
| Value " " for the generateSwaggerAnnotations parameter is… | exception | error | openapi-generator, java, micronaut, configuration, swagger-annotations |
| Failed to serialize merged spec | exception | error | openapi, spec-merge, serialization, jackson, dependency-conflict |
| Empty method/operation name (operationId) not allowed | exception | error | openapi-generator, javascript, apollo, openapi-spec, operationid |
| Flags 'useSwaggerAnnotations' (v2) and… | exception | error | java, jaxrs, openapi-generator, swagger, annotations, configuration, mutually-exclusive |
| No options were supplied | http | error | http-400, missing-body, request-binding, openapi-generator-online |
| Unexpected serializationLibrary value | exception | error | java, openapi-generator, serialization, jackson, gson, jsonb, configuration, option-validation |
| Additional property 'useFlowForArrayReturnType' must be set… | exception | error | kotlin, spring, http-interface, flow, reactive, option-combination, openapi-generator, config-validation |
| mapNumberTo supports | exception | error | python, openapi-generator, configuration, cli-option |
| Number is too large to fit into i128 | exception | error | rust, numeric, openapi-spec, validation |
| Unsupported target " + language + " supplied | http | error | http-400, generator-name, code-gen-config-loader, openapi-generator-online |
| Empty method name (operationId) not allowed | exception | error | objective-c, operation-id, openapi-spec, openapi-generator, spec-validation |
| The BLOB, TEXT, GEOMETRY, and JSON data types cannot be… | exception | error | postgresql, database-schema, default-value, bytea, jsonb, openapi-spec, openapi-generator, spec-validation |
| Flags 'useSwaggerV3Annotations' and… | exception | error | java, jaxrs, quarkus, openapi-generator, swagger, microprofile, annotations, mutually-exclusive |
| must be one of [SKIP, FAIL] but was | exception | error | jackson, spring, codegen, config-validation |
| filter not supported | exception | error | openapi, normalizer, filter-syntax, unsupported-key |
| property in model uses generated storage name , which is an… | exception | error | python, codegen, naming, name-collision, openapi-generator |
| Both and properties were set with different value. | exception | error | java, helidon, openapi-generator, version-management, maven, configuration, option-validation |
| Error! Codegen Property not yet supported in getPydanticType | exception | error | pydantic, python, schema, openapi-generator |
| Failed to write collapsed spec | exception | error | openapi-generator, maven, file-write, ioexception, spec-merging, collapsed-spec |
| The BLOB and JSON data types cannot be assigned a default… | exception | error | ktorm, database-schema, default-value, blob, json, openapi-spec, openapi-generator, spec-validation |
| Template location must be constrained to template directory. | exception | error | openapi, template, path-traversal, security, illegal-argument |
| Error! anyOf schema is not of the type Schema | exception | error | openapi-generator, openapi, anyof, schema, normalizer |
| Framework is required | http | error | http-400, missing-parameter, spring-delegate, openapi-generator-online |
| recallScope key cannot be empty | exception | error | mustache, template, csharp, codegen, cache-lambda |
| can't load template | exception | error | openapi, template, io, code-generation, runtime-exception |
| Helidon version uses the namespace but options specified | exception | error | java, helidon, openapi-generator, jakarta-ee, javax, namespace, configuration, option-validation |
| mapNumberTo value must be Union[StrictFloat, StrictInt]… | validation | error | pydantic, python, configuration, cli-option |
| Please report the issue as the parameter name cannot be null | exception | error | connexion, python, parameters, openapi-spec |
| Malformed OpenAPI version | exception | error | openapi, spec-merge, version-validation, configuration |
| The [ ] documentation provider does not support [ ] as… | exception | error | kotlin, spring, springdoc, annotation-library, option-combination, openapi-generator, config-validation |
| This library currently only supports gson serialization… | exception | error | openapi-generator, kotlin, volley, serialization, configuration |
| Invalid mergeConflictStrategy value | exception | error | openapi-generator, maven, plugin-config, spec-merging, invalid-enum-value |
| cacheScope key cannot be empty | exception | error | mustache, template, csharp, codegen, cache-lambda |
| {name} | exception | error | openapi, template, code-generation, file-not-found |
| Error parsing version expression | exception | error | java, helidon, openapi-generator, version-management, maven, version-range |
| filter with no value not supported | exception | error | openapi, normalizer, filter-syntax, configuration |
| I/O error while reading file | http | error | http-500, io-error, filesystem, tmp-permissions, openapi-generator-online |
| property in model has invalid generated Python field name | exception | error | python, codegen, naming, identifier, pydantic, openapi-generator |