quarkusio/quarkus · error · RuntimeException

Got empty HTTP response body ${requestURI.completeURLString(

Error message

Got empty HTTP response body ${requestURI.completeURLString()}

What it means

After receiving HTTP 200, exchange() reads the body; if the response body is an empty string it throws a RuntimeException with the request URL. A 200 with an empty body means the server answered but returned no configuration payload, which cannot be deserialized into a Response object.

Source

Thrown at extensions/spring-cloud-config-client/runtime/src/main/java/io/quarkus/spring/cloud/config/client/runtime/VertxSpringCloudConfigGateway.java:223

                .get(requestURI.port(), requestURI.host(), requestURI.completeURLString())
                .ssl(UrlUtility.isHttps(requestURI.baseURI()))
                .putHeader("Accept", "application/json");
        if (config.usernameAndPasswordSet()) {
            request.basicAuthentication(config.username().get(), config.password().get());
        }
        for (Map.Entry<String, String> entry : config.headers().entrySet()) {
            request.putHeader(entry.getKey(), entry.getValue());
        }
        log.debug("Attempting to read configuration from '" + requestURI.completeURLString() + "'.");
        return request.send().map(r -> {
            log.debug("Received HTTP response code '" + r.statusCode() + "'");
            if (r.statusCode() != 200) {
                throw new RuntimeException("Got unexpected HTTP response code " + r.statusCode()
                        + " from " + requestURI.completeURLString());
            } else {
                String bodyAsString = r.bodyAsString();
                if (bodyAsString.isEmpty()) {
                    throw new RuntimeException("Got empty HTTP response body " + requestURI.completeURLString());
                }
                try {
                    log.debug("Attempting to deserialize response");
                    return OBJECT_MAPPER.readValue(bodyAsString, Response.class);
                } catch (JacksonException e) {
                    throw new RuntimeException("Got unexpected error " + e.getOriginalMessage());
                }
            }
        });
    }

    @Override
    public void close() {
        this.webClient.close();
        this.vertx.closeAndAwait();
    }
}

View on GitHub (pinned to e1c734241f)

Solutions

1. Curl the exact URL and inspect the raw response body
2. Verify the request goes to the Config Server, not a proxy/landing page (check the URL path /application/profile[/label])
3. Fix or bypass the intermediary stripping the body; upgrade the Config Server if it returns empty bodies for empty repos

Example fix

// before
quarkus.spring-cloud-config.url=http://gateway.internal/config

// after
quarkus.spring-cloud-config.url=http://config-server:8888

// verify the server returns a JSON payload
String body = httpClient.get(configUrl + "/app/profile").body();
if (body == null || body.isEmpty()) throw new IllegalStateException("Empty config payload");

catch (RuntimeException e) {
    if (e.getMessage().contains("Got empty HTTP response body")) {
        log.error("Server returned 200 with empty body; check proxies/server", e);
    }
}

When it happens

Trigger: Config Server returning 200 with zero-length body — typically seen with misconfigured server endpoints, empty repositories where the server misbehaves instead of returning proper JSON, or intermediary proxies stripping bodies.

Common situations: Reverse proxies/load balancers answering 200 with empty content; server-side bugs on specific property sources; HEAD-like responses from misrouted requests.

Related errors

• Got unexpected HTTP response code ${r.statusCode()} from ${r
• Unable to obtain configuration from Spring Cloud Config Serv
• Got unexpected error ${e.getOriginalMessage()}
• Failed to resolve application model <appArtifact> dependenci
• Failed to initialize Quarkus Maven extension manager

AI-assisted analysis of quarkusio/quarkus@e1c734241f (2026-09-05). Data as JSON: /api/errors/e37e0761b526bbca. Report an issue: GitHub.