SLF4J: Log error stack trace

‘error’ method of Logger interface is used to log an error message and complete error stack trace.

 

Example

LOGGER.error("Error Occuured while performing division operaiton a: {}, b: {}", a, b, e);

 

In the above example, last argument ‘e’ is the error thrown by jre. If the last argument in a logging statement is an exception/error, then SLF4J assume that the user wants the last argument to be treated as an exception and not a simple parameter.

 

Find the below working application.

 

LogErrorDemo.java

package com.sample.app;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LogErrorDemo {

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

	public static int div(int a, int b) {
		return a / b;
	}

	public static void main(String args[]) {
		int a = 10, b = 0;
		try {
			int e = a / b;
		} catch (Exception e) {
			LOGGER.error("Error Occuured while performing division operaiton a: {}, b: {}", a, b, e);
		}

	}
}

 

Output

ERROR	2021-07-05 14:19:37,843	1	com.sample.app.LogErrorDemo	[main]	Error Occuured while performing division operaiton a: 10, b: 0
java.lang.ArithmeticException: / by zero
	at com.sample.app.LogErrorDemo.main(LogErrorDemo.java:17)

 

You can download complete working application from below link.

https://github.com/harikrishna553/java-libs/blob/master/slf4j/slf4j-miscellaneous/src/main/java/com/sample/app/LogErrorDemo.java

 

 

 

 

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