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Swagger - Schema becoming "invalid" overnight

See original GitHub issue

Quite lost on this one and I can’t find anything else similar in the git issues.

My api is working fine with swagger etc but after leaving it running overnight attempting to go back to the swagger page the next day it produces a swagger.json error caused by a NullReferenceException with the below call stack. Simply restarting the service it works correctly. Any advice is appreciated!

Exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at FastEndpoints.Swagger.ValidationSchemaProcessor.Process(SchemaProcessorContext context)
   at NJsonSchema.Generation.JsonSchemaGenerator.ApplySchemaProcessors(JsonSchema schema, ContextualType contextualType, JsonSchemaResolver schemaResolver)
   at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResolver)
   at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver)
   at NJsonSchema.Generation.JsonSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, JsonSchemaResolver schemaResolver, Action`2 transformation)
   at NSwag.Generation.OpenApiSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, JsonSchemaResolver schemaResolver, Action`2 transformation)
   at NSwag.Generation.AspNetCore.Processors.OperationResponseProcessor.Process(OperationProcessorContext operationProcessorContext)
   at NSwag.Generation.AspNetCore.AspNetCoreOpenApiDocumentGenerator.RunOperationProcessors(OpenApiDocument document, ApiDescription apiDescription, Type controllerType, MethodInfo methodInfo, OpenApiOperationDescription operationDescription, List`1 allOperations, OpenApiDocumentGenerator swaggerGenerator, OpenApiSchemaResolver schemaResolver)
   at NSwag.Generation.AspNetCore.AspNetCoreOpenApiDocumentGenerator.AddOperationDescriptionsToDocument(OpenApiDocument document, Type controllerType, List`1 operations, OpenApiDocumentGenerator swaggerGenerator, OpenApiSchemaResolver schemaResolver)
   at NSwag.Generation.AspNetCore.AspNetCoreOpenApiDocumentGenerator.GenerateApiGroups(OpenApiDocument document, IGrouping`2[] apiGroups, OpenApiSchemaResolver schemaResolver)
   at NSwag.Generation.AspNetCore.AspNetCoreOpenApiDocumentGenerator.GenerateAsync(ApiDescriptionGroupCollection apiDescriptionGroups)
   at NSwag.AspNetCore.Middlewares.OpenApiDocumentMiddleware.GenerateDocumentAsync(HttpContext context)
   at NSwag.AspNetCore.Middlewares.OpenApiDocumentMiddleware.GetDocumentAsync(HttpContext context)
   at NSwag.AspNetCore.Middlewares.OpenApiDocumentMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Issue Analytics

State:
Created a year ago
Comments:27 (19 by maintainers)

Top GitHub Comments

2reactions

Conway6288commented, Aug 9, 2022

Since I deployed with v4.5.0-beta1 it seems to be ok for me at least, this morning there are no issues and the swagger ui is working correctly.

2reactions

Conway6288commented, Aug 4, 2022

Done! Will send through logs tomorrow.

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