Error occurs when @requestbody with large capacity in Spring Boot – Nginx

I am building a simple API using SpringBoot. Receives input through RequestBody and prints it out..

However, as the size of the RequestBody increases, the following error occurs. It doesn’t happen unconditionally, it sometimes succeeds…

2021-02-15 03:52:50.028  WARN 5115 --- [nio-8443-exec-3] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: I/O error while reading input message; nested exception is org.apache.catalina.connector.ClientAbortException: java.io.EOFException]
2021-02-15 03:52:50.037 ERROR 5115 --- [nio-8443-exec-3] o.a.c.c.C.[Tomcat].[localhost]           : Exception Processing ErrorPage[errorCode=0, location=/error]

org.apache.catalina.connector.ClientAbortException: org.apache.coyote.CloseNowException: Connection [{0}], Stream [{1}], This stream is not writable
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:309) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:272) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:118) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at java.base/java.io.FilterOutputStream.flush(FilterOutputStream.java:153) ~[na:na]
        at com.fasterxml.jackson.core.json.UTF8JsonGenerator.flush(UTF8JsonGenerator.java:1178) ~[jackson-core-2.11.4.jar!/:2.11.4]
        at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1008) ~[jackson-databind-2.11.4.jar!/:2.11.4]
        at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:345) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:104) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:277) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.handleReturnValue(HttpEntityMethodProcessor.java:219) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:78) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:124) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1060) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.41.jar!/:4.0.FR]
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.3.jar!/:5.3.3]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.41.jar!/:4.0.FR]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103) ~[spring-web-5.3.3.jar!/:5.3.3]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:398) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:257) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:179) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.StreamProcessor.service(StreamProcessor.java:405) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.StreamProcessor.process(StreamProcessor.java:74) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.StreamRunnable.run(StreamRunnable.java:35) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
Caused by: org.apache.coyote.CloseNowException: Connection [{0}], Stream [{1}], This stream is not writable
        at org.apache.coyote.http2.Stream.doStreamCancel(Stream.java:255) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.Http2UpgradeHandler.reserveWindowSize(Http2UpgradeHandler.java:856) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.Stream$StreamOutputBuffer.flush(Stream.java:901) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.Stream$StreamOutputBuffer.flush(Stream.java:847) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.Stream$StreamOutputBuffer.flush(Stream.java:970) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.Http2OutputBuffer.flush(Http2OutputBuffer.java:77) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.http2.StreamProcessor.flush(StreamProcessor.java:234) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:402) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.coyote.Response.action(Response.java:209) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:305) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        ... 51 common frames omitted
Caused by: org.apache.coyote.http2.StreamException: Connection [{0}], Stream [{1}], This stream is not writable
        at org.apache.coyote.http2.Stream.doStreamCancel(Stream.java:247) ~[tomcat-embed-core-9.0.41.jar!/:9.0.41]
        ... 60 common frames omitted

https://pastebin.com/PRHwJ8XM

Spring Boot configuration including

1. spring.servlet.multipart.max-file-size
2. spring.servlet.multipart.max-request-size
3. server.max-http-form-post-size
4. server.max-swallow-size
5. server.tomcat.connection-timeout

and nginx I have modified all the settings.

It didn’t happen over time that the error occurred, but the error occurred as soon as I sent the POST request. The small body still works well…

The client encodes the image file as Base64 and passes the encoding result as JSON. If the length of Base64 is short, it will be processed without any problems, but if the length is longer, a corresponding error occurs.

If you have any relevant experience, I ask for advice on how to fix it.