ajax 통신중 2분에 502 에러

Question

안녕하세요 현재 웹프로젝트에서 어떠한 기능을 사용하려고 ajax 통신을 하면 2분에 502 에러가 발생합니다. 그 뒤에 시간이 조금 지나면 DB는 정상적으로 반영이 되어있습니다. 백엔드는 정상적으로 진행이 되고있습니다. 이를 해결하기 위해서 제가 시도한 내용 입니다.ajaxtimeout: 0application.ymlspring: rest: connection-timeout: 3600000 read-timeout: 3600000server: tomcat: connection-timeout: -1window iis 연결 시간 제한 3600마리아DB Variable_name;Valueconnect_timeout;10deadlock_timeout_long;50000000deadlock_timeout_short;10000delayed_insert_timeout;300innodb_flush_log_at_timeout;1innodb_lock_wait_timeout;3600innodb_rollback_on_timeout;OFFinteractive_timeout;3600lock_wait_timeout;86400net_read_timeout;30net_write_timeout;60slave_net_timeout;60thread_pool_idle_timeout;60wait_timeout;3600에러로그org.apache.catalina.connector.ClientAbortException: java.io.IOException: 현재 연결은 원격 호스트에 의해 강제로 끊겼습니다 at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:310) at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:273) at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:118) at org.springframework.session.web.http.OnCommittedResponseWrapper$SaveContextServletOutputStream.flush(OnCommittedResponseWrapper.java:499) at java.base/java.io.FilterOutputStream.flush(FilterOutputStream.java:153) at com.fasterxml.jackson.core.json.UTF8JsonGenerator.flush(UTF8JsonGenerator.java:1187) at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1009) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:456) at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:104) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:290) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:183) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:78) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:135) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.servlet.resource.ResourceUrlEncodingFilter.doFilter(ResourceUrlEncodingFilter.java:67) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:142) at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:82) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1787) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.base/java.lang.Thread.run(Thread.java:829)Caused by: java.io.IOException: 현재 연결은 원격 호스트에 의해 강제로 끊겼습니다 at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method) at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51) at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:113) at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:79) at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:50) at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:462) at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:135) at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1423) at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:768) at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:732) at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:716) at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.flush(Http11OutputBuffer.java:573) at org.apache.coyote.http11.filters.ChunkedOutputFilter.flush(ChunkedOutputFilter.java:157) at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:221) at org.apache.coyote.http11.Http11Processor.flush(Http11Processor.java:1255) at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:402) at org.apache.coyote.Response.action(Response.java:209) at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:306) ... 66 common frames omitted

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ajax 통신중 2분에 502 에러

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