CODEWITHSUNDEEP
spring-bootlogging
Aetherus
Aetherus

Reputation: 8888

Spring boot logger logs nothing

I created a Spring MVC project using Spring Boot (1.5.8.RELEASE). I picked web, jpa and mysql, and added absolutely nothing in my build.gradle.

Here is the relevant part of my application.yml:

logging:
  level: trace

That's all the configuration about logging. I just want the log messages to be shown in the console, so I just omit the logging.path.

And I have the controller

package com.example.controllers;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
// other imports ...

@RestController
@RequestMapping("/")
public class DummyController {

  private static final Logger LOGGER = 
    LoggerFactory.getLogger(DummyController.class);

  @GetMapping
  public void foo() {
    LOGGER.info("foo");
  }
}

When I send a request to /, I get a 200 OK response, but nothing appears in the log. Strangely, the log messages of Spring framework and Hibernate do appear in the console. Just my ad-hoc log messages missing.

Then I debugged my code, and saw that the ancestor of LOGGER (the root of the logger tree) is a logger with log level INFO. That's apparently not the logger I configured. However, the official documentation of Spring doesn't tell me how to get the logger instance I want. How can I do this? Is there something wrong with my code, or do I miss something in the configuration?

Upvotes: 4

Views: 13249

Answers (2)

abhinav kumar
abhinav kumar

Reputation: 1803

IF you take a look to below link http://www.slf4j.org/api/org/apache/log4j/Level.html

TRACE level is below INFO and you are trying to log info so you are not able to see the log

logging.level.com.abc.app=DEBUG

where com.abc.app is your root dir of your application

Upvotes: 0

varren
varren

Reputation: 14731

The official documentation is straightforward that the root logger can be configured using logging.level.root. But you actually can configure logging for each package/class individually 

logging.level.root=TRACE                     # default for everything
logging.level.com.example.controllers=TRACE  # for your controllers package

Similar application.yml:

logging:
 level:
   root: TRACE 
   com.example.controllers: TRACE

Upvotes: 4

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