This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Boot 3.5.7!

Log File (`logfile`)

The logfile endpoint provides access to the contents of the application’s log file.

Retrieving the Log File

To retrieve the log file, make a GET request to /actuator/logfile, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/logfile' -i -X GET

The resulting response is similar to the following:

HTTP/1.1 200 OK
Accept-Ranges: bytes
Content-Type: text/plain;charset=UTF-8
Content-Length: 4707
 . ____ _ __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::
2017年08月08日 17:12:30.910 INFO 19866 --- [ main] s.f.SampleWebFreeMarkerApplication : Starting SampleWebFreeMarkerApplication with PID 19866
2017年08月08日 17:12:30.913 INFO 19866 --- [ main] s.f.SampleWebFreeMarkerApplication : No active profile set, falling back to default profiles: default
2017年08月08日 17:12:30.952 INFO 19866 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@76b10754: startup date [Tue Aug 08 17:12:30 BST 2017]; root of context hierarchy
2017年08月08日 17:12:31.878 INFO 19866 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2017年08月08日 17:12:31.889 INFO 19866 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017年08月08日 17:12:31.890 INFO 19866 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16
2017年08月08日 17:12:31.978 INFO 19866 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017年08月08日 17:12:31.978 INFO 19866 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1028 ms
2017年08月08日 17:12:32.080 INFO 19866 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017年08月08日 17:12:32.084 INFO 19866 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017年08月08日 17:12:32.084 INFO 19866 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017年08月08日 17:12:32.084 INFO 19866 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017年08月08日 17:12:32.084 INFO 19866 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017年08月08日 17:12:32.349 INFO 19866 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@76b10754: startup date [Tue Aug 08 17:12:30 BST 2017]; root of context hierarchy
2017年08月08日 17:12:32.420 INFO 19866 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(jakarta.servlet.http.HttpServletRequest)
2017年08月08日 17:12:32.421 INFO 19866 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(jakarta.servlet.http.HttpServletRequest,jakarta.servlet.http.HttpServletResponse)
2017年08月08日 17:12:32.444 INFO 19866 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017年08月08日 17:12:32.444 INFO 19866 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017年08月08日 17:12:32.471 INFO 19866 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017年08月08日 17:12:32.600 INFO 19866 --- [ main] o.s.w.s.v.f.FreeMarkerConfigurer : ClassTemplateLoader for Spring macros added to FreeMarker configuration
2017年08月08日 17:12:32.681 INFO 19866 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017年08月08日 17:12:32.744 INFO 19866 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http)
2017年08月08日 17:12:32.750 INFO 19866 --- [ main] s.f.SampleWebFreeMarkerApplication : Started SampleWebFreeMarkerApplication in 2.172 seconds (JVM running for 2.479)

Retrieving Part of the Log File

Retrieving part of the log file is not supported when using Jersey.

To retrieve part of the log file, make a GET request to /actuator/logfile by using the Range header, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/logfile' -i -X GET \
 -H 'Range: bytes=0-1023'

The preceding example retrieves the first 1024 bytes of the log file. The resulting response is similar to the following:

HTTP/1.1 206 Partial Content
Accept-Ranges: bytes
Content-Type: text/plain;charset=UTF-8
Content-Range: bytes 0-1023/4707
Content-Length: 1024
 . ____ _ __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::
2017年08月08日 17:12:30.910 INFO 19866 --- [ main] s.f.SampleWebFreeMarkerApplication : Starting SampleWebFreeMarkerApplication with PID 19866
2017年08月08日 17:12:30.913 INFO 19866 --- [ main] s.f.SampleWebFreeMarkerApplication : No active profile set, falling back to default profiles: default
2017年08月08日 17:12:30.952 INFO 19866 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@76b10754: startup date [Tue Aug 08 17:12:30 BST 2017]; root of context hierarchy
2017年08月08日 17:12:31.878 INFO 19866 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
20

Log File (logfile)

Retrieving the Log File

Retrieving Part of the Log File

Log File (`logfile`)