log file is not generating using log4j2 in spring boot - spring-boot

Question

I am using Log4j2 for logging with Spring Boot , but it is not creating the log file. Given below is my configuration for Log4j2 and dependencies i added. i tried all possible solution.
Log4j2 configuration -
Configuration:
name: Default
Properties:
Property:
name: log-path
value: "logs"
Appenders:
Console:
name: Console_Appender
target: SYSTEM_OUT
PatternLayout:
pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
File:
name: File_Appender
fileName: ${log-path}/logfile.log
PatternLayout:
pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
Loggers:
Root:
level: debug
AppenderRef:
- ref: Console_Appender
Logger:
- name: com.example
level: debug
AppenderRef:
- ref: File_Appender
level: error
dependencies used in build.gradle file:
configurations {
all*.exclude group:'org.springframework.boot', module: 'spring-boot-starter-logging'
all*.exclude module: 'logback-classic'
compileOnly {
extendsFrom annotationProcessor
}
developmentOnly
runtimeClasspath {
extendsFrom developmentOnly
}
}
dependencies {
compile 'org.springframework.boot:spring-boot-starter'
compile 'org.springframework.boot:spring-boot-starter-web'
compile 'org.springframework.boot:spring-boot-starter-log4j2'
developmentOnly 'org.springframework.boot:spring-boot-devtools'
}
Application file :
#SpringBootApplication
public class DemoApplication {
private static final Logger logger = LogManager.getLogger(DemoApplication.class);
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
logger.debug("This is a debug message");
logger.info("This is an info message");
logger.warn("This is a warn message");
logger.error("This is an error message");
logger.fatal("This is a fatal message");
}
}
After start appplication file getting logging in console but file is not generating.

Answer 1

Please Use below configuration file
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN" monitorInterval="30">
<Properties>
<Property name="basePath">{base_path}</Property>
</Properties>
<Appenders>
<RollingFile name="fileLogger"
fileName="${basePath}/LogFileName.log"
filePattern="${basePath}/LogFileName_%d{yyyy-MM-dd}.log">
<PatternLayout>
<pattern>%d{yyyy-MMM-dd HH:mm:ss.SSS} %5p [%50.50c] : %M - %m%n
</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy interval="1"
modulate="true" />
</Policies>
</RollingFile>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout
pattern="%d{yyyy-MMM-dd HH:mm:ss.SSS} %5p [%50.50c] : %M - %m%n" />
</Console>
</Appenders>
<Loggers>
<Logger name="{your_package}" level="debug" additivity="true">
<appender-ref ref="fileLogger" level="debug" />
</Logger>
<Logger name="org.springframework" level="info"
additivity="true">
<appender-ref ref="fileLogger" level="info" />
</Logger>
<Root level="info" additivity="false">
<appender-ref ref="console" />
</Root>
</Loggers>
</Configuration>

Answer 2

your log filename fileName: ${log-path}/logfile.log has log-path refers a property, however that property is not defined
you need to add property in log4j file
<Properties>
<Property name="log-path">{log-path}</Property>
</Properties>

Answer 3

To support yaml format, need additional dependencies. After adding these dependencies, it is working fine.
compile 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml'
compile 'com.fasterxml.jackson.core:jackson-databind'