actuator/bindings throwing exception starting from version 2025.0.1 for kafka binder #3167
Description
Hello,
I have a spring boot application that is using spring cloud stream with the kafka binder. Calling the /actuator/bindings was working when I was using Spring Cloud version 2025.0.1(SB 3.5.9).
But starting with Spring Cloud version 2025.0.1 and with version 2025.1.0 (SB 4.0.0) the endpoint in not working anymore.
I've created the following project that reproduce the issue:
https://github.com/fdlessard/spring-boot-cloud-stream-kafka-359
Here is the error response I always get when calling GET http://localhost:8080/actuator/bindings with Spring Cloud 2025.0.1+. If you change the version to 2025.0.0 this will work
{
"timestamp": "2026-01-06T18:11:30.075+00:00",
"status": 500,
"error": "Internal Server Error",
"trace": "java.lang.IllegalArgumentException: getOutputStream() has already been called for this response (through reference chain: org.springframework.kafka.listener.ContainerProperties["observationRegistry"]->io.micrometer.observation.NoopObservationRegistry["currentObservation"]->io.micrometer.observation.SimpleObservation["context"]->org.springframework.http.server.observation.ServerRequestObservationContext["response"]->org.apache.catalina.connector.ResponseFacade["writer"]) (through reference chain: java.util.ArrayList[0]->org.springframework.cloud.stream.binder.AbstractMessageChannelBinder$2["additionalConfigurationProperties"])\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4671)\n\tat com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4602)\n\tat org.springframework.cloud.stream.binding.BindingsLifecycleController.queryStates(BindingsLifecycleController.java:195)\n\tat org.springframework.cloud.stream.endpoint.BindingsEndpoint.queryStates(BindingsEndpoint.java:80)\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\n\tat org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:281)\n\tat org.springframework.boot.actuate.endpoint.invoke.reflect.ReflectiveOperationInvoker.invoke(ReflectiveOperationInvoker.java:74)\n\tat org.springframework.boot.actuate.endpoint.annotation.AbstractDiscoveredOperation.invoke(AbstractDiscoveredOperation.java:60)\n\tat org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$ServletWebOperationAdapter.handle(AbstractWebMvcEndpointHandlerMapping.java:327)\n\tat org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(AbstractWebMvcEndpointHandlerMapping.java:434)\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:258)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:191)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:991)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:896)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)\n\tat jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)\n\tat jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.springframework.web.filter.ServerHttpObservationFilter.doFilterInternal(ServerHttpObservationFilter.java:110)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:138)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:165)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:113)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:83)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:72)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1774)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:973)\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:491)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\nCaused by: com.fasterxml.jackson.databind.JsonMappingException: getOutputStream() has already been called for this response (through reference chain: org.springframework.kafka.listener.ContainerProperties["observationRegistry"]->io.micrometer.observation.NoopObservationRegistry["currentObservation"]->io.micrometer.observation.SimpleObservation["context"]->org.springframework.http.server.observation.ServerRequestObservationContext["response"]->org.apache.catalina.connector.ResponseFacade["writer"]) (through reference chain: java.util.ArrayList[0]->org.springframework.cloud.stream.binder.AbstractMessageChannelBinder$2["additionalConfigurationProperties"])\n\tat com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:400)\n\tat com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:359)\n\tat com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:324)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:765)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.java:119)\n\tat com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:79)\n\tat com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:18)\n\tat com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:503)\n\tat com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:342)\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4649)\n\t... 62 more\nCaused by: java.lang.IllegalArgumentException: getOutputStream() has already been called for this response (through reference chain: org.springframework.kafka.listener.ContainerProperties["observationRegistry"]->io.micrometer.observation.NoopObservationRegistry["currentObservation"]->io.micrometer.observation.SimpleObservation["context"]->org.springframework.http.server.observation.ServerRequestObservationContext["response"]->org.apache.catalina.connector.ResponseFacade["writer"])\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4671)\n\tat com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4602)\n\tat org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder.doGetAdditionalConfigurationProperties(KafkaMessageChannelBinder.java:870)\n\tat org.springframework.cloud.stream.binder.AbstractMessageChannelBinder$2.getAdditionalConfigurationProperties(AbstractMessageChannelBinder.java:587)\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:688)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\t... 69 more\nCaused by: com.fasterxml.jackson.databind.JsonMappingException: getOutputStream() has already been called for this response (through reference chain: org.springframework.kafka.listener.ContainerProperties["observationRegistry"]->io.micrometer.observation.NoopObservationRegistry["currentObservation"]->io.micrometer.observation.SimpleObservation["context"]->org.springframework.http.server.observation.ServerRequestObservationContext["response"]->org.apache.catalina.connector.ResponseFacade["writer"])\n\tat com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:400)\n\tat com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:359)\n\tat com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:324)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:765)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:732)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:732)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:732)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:732)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\tat com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:183)\n\tat com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:503)\n\tat com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:342)\n\tat com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4649)\n\t... 76 more\nCaused by: java.lang.IllegalStateException: getOutputStream() has already been called for this response\n\tat org.apache.catalina.connector.Response.getWriter(Response.java:523)\n\tat org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:186)\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\n\tat com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:688)\n\tat com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:760)\n\t... 92 more\n",
"message": "getOutputStream() has already been called for this response (through reference chain: org.springframework.kafka.listener.ContainerProperties["observationRegistry"]->io.micrometer.observation.NoopObservationRegistry["currentObservation"]->io.micrometer.observation.SimpleObservation["context"]->org.springframework.http.server.observation.ServerRequestObservationContext["response"]->org.apache.catalina.connector.ResponseFacade["writer"]) (through reference chain: java.util.ArrayList[0]->org.springframework.cloud.stream.binder.AbstractMessageChannelBinder$2["additionalConfigurationProperties"])",
"path": "/actuator/bindings"
}