A repo to test & explore Spring Cloud Gateway.
NPE when enabling CircuitBreaker
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Note
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Fixed with SpringBoot 2.5.6 |
Enabling CircuitBreaker endpoint returns error 500 due to internal NullPointerException when adding X-Forwarded-Proto header.
Attempting to disable as seen in docs it does not seem to work.
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Clone repo
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Run
./gradlew bootrunfrom terminal, or classScGatewayApplicationfrom IDE -
Call
/status/404endpointcurl "http:https://localhost:8080/status/404" -v
response obtained
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /status/404 HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.64.1
> Accept: */*
>
< HTTP/1.1 500 Internal Server Error
< Content-Type: application/json
< Content-Length: 136
<
* Connection #0 to host localhost left intact
{"timestamp":"2021-10-09T17:23:21.144+00:00","path":"/status/404","status":500,"error":"Internal Server Error","requestId":"d914bdeb-1"}* Closing connection 0
Stacktrace
2021-10-09 19:23:21.153 ERROR 9115 --- [ parallel-1] a.w.r.e.AbstractErrorWebExceptionHandler : [d914bdeb-1] 500 Server Error for HTTP GET "/status/404"
java.lang.NullPointerException: null
at org.springframework.util.StringUtils.collectionToDelimitedString(StringUtils.java:1304) ~[spring-core-5.3.10.jar:5.3.10]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP GET "/status/404" [ExceptionHandlingWebHandler]
Stack trace:
at org.springframework.util.StringUtils.collectionToDelimitedString(StringUtils.java:1304) ~[spring-core-5.3.10.jar:5.3.10]
at org.springframework.util.StringUtils.collectionToDelimitedString(StringUtils.java:1326) ~[spring-core-5.3.10.jar:5.3.10]
at org.springframework.util.StringUtils.collectionToCommaDelimitedString(StringUtils.java:1336) ~[spring-core-5.3.10.jar:5.3.10]
at org.springframework.cloud.gateway.filter.headers.XForwardedHeadersFilter.write(XForwardedHeadersFilter.java:291) ~[spring-cloud-gateway-server-3.0.4.jar:3.0.4]
at org.springframework.cloud.gateway.filter.headers.XForwardedHeadersFilter.filter(XForwardedHeadersFilter.java:216) ~[spring-cloud-gateway-server-3.0.4.jar:3.0.4]