Spring Boot 4.2.0-M2 GraphQL Webflux stopped returning content length.
Author: SledgeHammer01Created Sep 24, 2026Updated Sep 25, 2026
Labelsstatus: waiting-for-triage
Spring Boot 4.2.0-M2 (without changing ANYTHING else, reverting to M1 brings back content length) Webflux Netty 4.2.18.Final
On 4.2.0-M1 both successful and failed requests include the content length. On M2, the successful response is missing it (failed response includes it):
2026-09-24T16:21:08.259-07:00 ERROR 32272 --- [ main] o.s.t.w.r.s.ExchangeResult : Request details for assertion failure:
> POST http://localhost:8080/graphql
> WebTestClient-Request-Id: [1]
> Content-Type: [application/json]
> Content-Length: [1214]
{"query":"query IntrospectionQuery {\r\n __schema {\r\n queryType { name }\r\n mutationType { name }\r\n subscriptionType { name }\r\n types {\r\n kind\r\n name\r\n fields(includeDeprecated: true) {\r\n name\r\n args {\r\n name\r\n type { kind name ofType { kind name ofType { kind name } } }\r\n defaultValue\r\n }\r\n type { kind name ofType { kind name ofType { kind name } } }\r\n isDeprecated\r\n deprecationReason\r\n }\r\n inputFields {\r\n name\r\n type { kind name ofType { kind name ofType { kind name } } }\r\n defaultValue\r\n }\r\n interfaces {\r\n kind\r\n name\r\n }\r\n enumValues(includeDeprecated: true) {\r\n name\r\n isDeprecated\r\n deprecationReason\r\n }\r\n possibleTypes {\r\n kind\r\n name\r\n }\r\n }\r\n }\r\n}\r\n"}< 200 OK OK
< Content-Type: [application/json]
< Cache-Control: [no-cache, no-store, max-age=0, must-revalidate]
< Pragma: [no-cache]
< Expires: [0]
< X-Content-Type-Options: [nosniff]
< Referrer-Policy: [no-referrer]
{"data":{"__schema":{"queryType":{"name":"Query"},"mutationType":null,"subscriptionType":null,"types": ....The response is correct otherwise. This is an introspection request, but I get the same thing on regular requests.
Source: spring-projects/spring-boot