Spring boot logbcak to file is not working on tomcat - spring-boot

Question

I am running spring boot as War on tomcat with logback to console and file.
as long as i run as Java application it is fine i can see logs in console and file.
but i dont see logs printed to file when run on server.
I tried setting logger manager also, didnt work. was wondering to know if some one has faced similar issue.
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/defaults.xml" />
<include resource="org/springframework/boot/logging/logback/file-appender.xml" />
<property name="LOG_FILE"
value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}app.log}"/>
<property name="LOG_FILE_MAX_SIZE" value="10MB" />
<property name="LOG_TOTAL_SIZE_CAP" value="100MB" />
<property name="LOG_FILE_MAX_HISTORY" value="20" />
<root level="INFO">
<appender-ref ref="FILE" />
</root>
</configuration>

Answer 1

Verify that you have the following dependency :
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
or even if you have spring-boot-starter-web dependency added, logging should work.
and have the following in yml or properties file :
logging.path=logs
logging.file=${logging.path}/log.log
logging.pattern.file=%d{dd-MM-yyyy HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M - %msg%n
and you can also have a logback.xml and use the spring default base.xml in that so that all default spring configurations apply for your logging as well :
logback.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<logger name="org.springframework.web" level="DEBUG"/>
</configuration>

Answer 2

Here is my logback-spring.xml which i have
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/defaults.xml" />
<include resource="org/springframework/boot/logging/logback/file-appender.xml" />
<property name="LOG_FILE"
value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}app.log}"/>
<property name="LOG_FILE_MAX_SIZE" value="10MB" />
<property name="LOG_TOTAL_SIZE_CAP" value="100MB" />
<property name="LOG_FILE_MAX_HISTORY" value="20" />
<root level="INFO">
<appender-ref ref="FILE" />
</root>
</configuration>

Answer 3

I could fix it by writing the logs to a different folder looks application doesn't have write access the path, however i need to make some changes to springboot main class for loading application props based profile, please find the class below. not sure if others had to the same.
anyway i am glad it is working finally:)
public class Application extends SpringBootServletInitializer{
public String PROFILE = null;
private static String CONFIG_LOCATION = null;
#Override
public void onStartup(ServletContext servletContext) throws ServletException {
//Grab the active profile from the servlet conext
PROFILE = servletContext.getInitParameter("spring.profiles.active");
CONFIG_LOCATION = servletContext.getInitParameter("spring.config.path");
super.onStartup(servletContext);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
//...and pass it to the boot application
application.application().setAdditionalProfiles(PROFILE);
return application.sources(Application.class).properties(getProperties());
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
//For Loading config from server
static Properties getProperties() {
Properties props = new Properties();
props.put("spring.config.location", CONFIG_LOCATION);
return props;
}
}
web.xml
<context-param>
<param-name>spring.profiles.active</param-name>
<param-value>dev</param-value>
</context-param>
<context-param>
<param-name>spring.config.path</param-name>
<param-value>classpath:app.config/</param-value>
</context-param>