Log4j2 prints error when log4j2-spring.xml is used

[cforce]

According to doc https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-logging.html the name shall work with "log4j2-spring.xml". but only does with "log4j2.xml"

as proposed from spring-cloud/spring-cloud-commons#72 (comment)

[snicoll]

It does work but logs this error on startup

ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.

I assume that's what confused you in the first place, I don't know if this is new or not at this point but that extra statement is the only problem as far as I can see.

[yairogen]

Any updates? I could only suppress this error print by adding:

-Dlog4j.configurationFile=log4j2-spring.xml

[RTM945]

get the same problem

@RestController
@EnableAutoConfiguration
@SpringBootApplication

public class Example {

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }


    public static void main(String[] args) throws Exception {
        new SpringApplicationBuilder(Example.class).listeners(new LoadAdditionalProperties()).run(args);
    }

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        JettyEmbeddedServletContainerFactory factory = new JettyEmbeddedServletContainerFactory("/project", 9000);
        factory.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/notfound.html"));
        return factory;
    }

}

//copy from https://github.com/spring-projects/spring-boot/issues/6220
@Component
public class LoadAdditionalProperties implements ApplicationListener<ApplicationEnvironmentPreparedEvent> {

    private ResourceLoader loader = new DefaultResourceLoader();

    @Override
    public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
        try {
            Resource resource = loader.getResource("file:conf/project/application.yml");
            PropertySource<?> propertySource = new PropertySourcesLoader().load(resource);
            event.getEnvironment().getPropertySources().addLast(propertySource);
        } catch (IOException ex) {
            throw new IllegalStateException(ex);
        }
    }

}

My application.yml:

logging: 
    config: file:conf/project/log4j2.xml

my log4j.xml:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration monitorInterval="60">
    <Appenders>
        <Console name="Console-Appender" target="SYSTEM_OUT">
            <PatternLayout>
                <pattern>
                    %d{ABSOLUTE} %5p %t %c{2}:%L - %m%n
                </pattern>>
            </PatternLayout>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console-Appender"/>
        </Root>
    </Loggers>
</Configuration>

run with this error on startup:

ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.

and spring uses default logger like:

INFO 50608 --- [ main] c.w.a.Example : Starting Example on....

then I set properties to springApplicationBuilder:

new SpringApplicationBuilder(Example.class)
.properties("logging.config=file:conf/project/log4j2.xml")
.listeners(new LoadAdditionalProperties()).run(args);

log4j2 works but also the same error on startup:

ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.

[wilkinsona]

If you don't want to use a system property, you can suppress the error with a file named log4j2.component.properties with the contents:

log4j.configurationFile=log4j2-spring.xml

[wilkinsona]

@philwebb Perhaps we could include such a properties file in our log4j2 starter? The value can be a comma-separated list so it could be:

log4j.configurationFile=log4j2.xml,log4j2-spring.xml

[philwebb]

@wilkinsona That would be nice. I'll target this to 1.5 to investigate since it seems to be causing grief for people.

[yeta-io-ceo]

Hello,

After this patch my log4j2.xml project file configuration is ignored by spring, I see nothing in console. Only after rename log4j2.xml to log4j2-spring.xml it started work again. So, it's looks like regression introduced by this patch.

[philwebb]

@yeta-io Thanks, we discovered this ourselves today (see #7783). I've got a different fix I'm about to commit.

[philwebb]

@yeta-io If you've got time to test the latest snapshot, I'd appreciate it.