Occasionally, when Spring AI calls a llm, it reports a network error：HTTP/1.1 header parser received no bytes #4082
Description
Bug description
This error is sporadic, and the occurrence rate increases when the network environment is poor
Environment
org.springframework.ai
spring-ai-bom
1.0.0
pom
import
org.springframework.ai
spring-ai-starter-model-deepseek
ChatResponse chatResponse = getChatClient().prompt(prompt)
.system(getSystemPrompt())
.toolCallbacks(this.availableTools)
.call()
.chatResponse();
Steps to reproduce
The issue cannot be reproduced and is sporadic
Minimal Complete Reproducible example
2025-08-07 15:36:20.414 [http-nio-8082-exec-2] [d6f010c2030c4e2980db4df4a9da0319] WARN o.s.a.r.a.SpringAiRetryAutoConfiguration - Retry error. Retry count: 1, Exception: I/O error on POST request for "https://api.deepseek.com/chat/completions": HTTP/1.1 header parser received no bytes
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://api.deepseek.com/chat/completions": HTTP/1.1 header parser received no bytes
at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.createResourceAccessException(DefaultRestClient.java:697)
at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchangeInternal(DefaultRestClient.java:582)
at org.springframework.web.client.DefaultRestClient$DefaultRequestBodyUriSpec.exchange(DefaultRestClient.java:533)
at org.springframework.web.client.RestClient$RequestHeadersSpec.exchange(RestClient.java:680)
at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.executeAndExtract(DefaultRestClient.java:814)
at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.toEntityInternal(DefaultRestClient.java:774)
at org.springframework.web.client.DefaultRestClient$DefaultResponseSpec.toEntity(DefaultRestClient.java:763)
at org.springframework.ai.deepseek.api.DeepSeekApi.chatCompletionEntity(DeepSeekApi.java:125)
at org.springframework.ai.deepseek.DeepSeekChatModel.lambda$internalCall$1(DeepSeekChatModel.java:168)
at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:357)
at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:230)
at org.springframework.ai.deepseek.DeepSeekChatModel.lambda$internalCall$3(DeepSeekChatModel.java:168)
at io.micrometer.observation.Observation.observe(Observation.java:564)
at org.springframework.ai.deepseek.DeepSeekChatModel.internalCall(DeepSeekChatModel.java:165)
at org.springframework.ai.deepseek.DeepSeekChatModel.call(DeepSeekChatModel.java:150)
at org.springframework.ai.chat.client.advisor.ChatModelCallAdvisor.adviseCall(ChatModelCallAdvisor.java:54)
at org.springframework.ai.chat.client.advisor.DefaultAroundAdvisorChain.lambda$nextCall$1(DefaultAroundAdvisorChain.java:110)
at io.micrometer.observation.Observation.observe(Observation.java:564)
at org.springframework.ai.chat.client.advisor.DefaultAroundAdvisorChain.nextCall(DefaultAroundAdvisorChain.java:110)
at com.pa.sitemcpclient2.advisor.MyLoggerAdvisor.adviseCall(MyLoggerAdvisor.java:61)
at org.springframework.ai.chat.client.advisor.DefaultAroundAdvisorChain.lambda$nextCall$1(DefaultAroundAdvisorChain.java:110)
at io.micrometer.observation.Observation.observe(Observation.java:564)
at org.springframework.ai.chat.client.advisor.DefaultAroundAdvisorChain.nextCall(DefaultAroundAdvisorChain.java:110)
at org.springframework.ai.chat.client.DefaultChatClient$DefaultCallResponseSpec.lambda$doGetObservableChatClientResponse$1(DefaultChatClient.java:469)
at io.micrometer.observation.Observation.observe(Observation.java:564)
at org.springframework.ai.chat.client.DefaultChatClient$DefaultCallResponseSpec.doGetObservableChatClientResponse(DefaultChatClient.java:467)
at org.springframework.ai.chat.client.DefaultChatClient$DefaultCallResponseSpec.doGetObservableChatClientResponse(DefaultChatClient.java:446)
at org.springframework.ai.chat.client.DefaultChatClient$DefaultCallResponseSpec.chatResponse(DefaultChatClient.java:435)
at com.pa.sitemcpclient2.agent.ToolCallAgent.think(ToolCallAgent.java:73)
at com.pa.sitemcpclient2.agent.ReActAgent.step(ReActAgent.java:39)
at com.pa.sitemcpclient2.agent.BaseAgent.run(BaseAgent.java:69)
at com.pa.sitemcpclient2.service.impl.ChatServiceImpl.getSiteBasicInfo(ChatServiceImpl.java:70)
at com.pa.sitemcpclient2.controller.ChatController.getSiteBasicInfo(ChatController.java:28)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:258)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:191)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:986)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:891)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:116)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:398)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1769)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1189)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:658)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
at java.base/java.lang.Thread.run(Thread.java:833)