SpringBoot springboot start slow ，the log will be stuck for a few seconds,why,how to solve,thanks

[DEBUG] 2020-09-03 13:44:09.796 [main] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:213): Creating shared instance of singleton bean 'org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration'
[DEBUG] 2020-09-03 13:44:09.797 [main] org.springframework.core.LocalVariableTableParameterNameDiscoverer.inspectClass(LocalVariableTableParameterNameDiscoverer.java:108): Cannot find '.class' file for class [class org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration$$EnhancerBySpringCGLIB$$821433d9] - unable to determine constructor/method parameter names
[DEBUG] 2020-09-03 13:44:09.804 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration' via constructor to bean named 'spring.http-org.springframework.boot.autoconfigure.http.HttpProperties'
[DEBUG] 2020-09-03 13:44:09.804 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration' via constructor to bean named 'spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties'
[DEBUG] 2020-09-03 13:44:09.834 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'dispatcherServletRegistration' via factory method to bean named 'dispatcherServlet'
[DEBUG] 2020-09-03 13:44:09.840 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration' via constructor to bean named 'server-org.springframework.boot.autoconfigure.web.ServerProperties'
[DEBUG] 2020-09-03 13:44:09.841 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration' via constructor to bean named 'dispatcherServletRegistration'
[DEBUG] 2020-09-03 13:44:09.844 [main] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:213): Creating shared instance of singleton bean 'conventionErrorViewResolver'
[DEBUG] 2020-09-03 13:44:09.845 [main] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:213): Creating shared instance of singleton bean 'org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration'
[DEBUG] 2020-09-03 13:44:09.846 [main] org.springframework.core.LocalVariableTableParameterNameDiscoverer.inspectClass(LocalVariableTableParameterNameDiscoverer.java:108): Cannot find '.class' file for class [class org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration$$EnhancerBySpringCGLIB$$72557e35] - unable to determine constructor/method parameter names
[DEBUG] 2020-09-03 13:44:09.854 [main] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:213): Creating shared instance of singleton bean 'spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties'
[DEBUG] 2020-09-03 13:44:09.864 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration' via constructor to bean named 'org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@17695df3'
**[DEBUG] 2020-09-03 13:44:09.865 [main] org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:775): Autowiring by type from bean name 'org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration' via constructor to bean named 'spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties'

[DEBUG] 2020-09-03 13:44:15.085 [main] org.springframework.boot.web.servlet.server.DocumentRoot.getArchiveFileDocumentRoot(DocumentRoot.java:82): Code archive: /iotp/s17/dfds/dist_lib/S17-dfds.jar
[DEBUG] 2020-09-03 13:44:15.086 [main] org.springframework.boot.web.servlet.server.DocumentRoot.getExplodedWarFileDocumentRoot(DocumentRoot.java:126): Code archive: /iotp/s17/dfds/dist_lib/S17-dfds.jar**

Comment From: wilkinsona

If you are running on macOS, the problem could be due to slow hostname resolution. You can learn how to correct the problem in this answer on Stack Overflow. If that's not it, then we'll need some more information to diagnose the problem. Some thread dumps taken during the 5 second pause while things appear to be stuck would help with that.

Comment From: spring-projects-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.