logs not printing the full stack trace of exception in log file - spring-boot

Question

I am trying to print the whole stack trace of exception in my log file without adding log.error statement in code as i have to make this generic implementation throughout the application. Can anyone help in this Here are log4j2 configuration xml file.
<?xml version="1.0" encoding="UTF-8"?>
<configuration status="WARN">
<appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</Console>
<File name="MyFile" fileName="logs/app.log">
<PatternLayout pattern="%d{yyyy-mm-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</File>
</appenders>
<logger name="org.springframework" level="error" additivity="false">
<AppenderRef ref="MyFile"/>
</logger>
<root level="INFO">
<appender-ref ref="Console"/>
</root>
</configuration>

Answer 1

Without ever using a log.error statement it is not possible to pipe the output to a log-file via log4j2 xml configuration. However, there is one way to optimise this by handling you exceptions centrally at one place instead of doing this repeatedly in the code.
Write a separate class which will handle all exceptions ultimately, you can use
#ExceptionHandler(Exception.class), this will handle all exceptions, in this you can intercept the exception and log out the full stack-trace using a log.error(e). Annotating this class with #ControllerAdvice(<all_pckages_you_want_cover>) will ensure whenever an unhandled exception is raised it is finally intercepted at this point and logged.
Reference: https://dzone.com/articles/global-exception-handling-with-controlleradvice
PS: If you are asking about handled exceptions they are anyways going to be custom handled, so you add a single line for logging them in your catch block.