java - 为什么Java spring boot logback不记录异常

Question

我是 Spring Boot 新手，我刚刚设置了 logback 将日志写入自定义日志文件。一切正常，我已成功将自定义日志消息写入文件，但是当引发异常时，错误并且堆栈跟踪不会写入文件。

src/main/resources/logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
        </encoder>
    </appender>

    <timestamp key="timestamp" datePattern="yyyy-MM-dd"/>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/app-${timestamp}.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover -->
            <fileNamePattern>logFile.%d{yyyy-MM-dd}.log</fileNamePattern>
            <!-- retain 30 days logs -->
            <maxHistory>30</maxHistory>
        </rollingPolicy>

        <encoder>
            <pattern>%date [%level] from %logger in %thread - %message%n%xException</pattern>
        </encoder>
    </appender>

    <root level="INFO">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="FILE" />
    </root>
</configuration>

src/main/resources/application.properties

logging.config=classpath:logback.xml

主类:

@SpringBootApplication
public class DemoApplication {

    private static final Logger logger = Logger.getLogger("DEMO");

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);

        logger.log(Level.INFO, "main called");

        throw new IllegalArgumentException("This is a test");
    }
}

以及不在日志文件中的堆栈跟踪:

Exception in thread "main" java.lang.IllegalArgumentException: This is a test
00:06:54.179 [main] ERROR DEMO - This is an error
    at com.demo.DemoApplication.main(DemoApplication.java:18)

P.S:我尝试更改根级别日志记录:<root level="ERROR">但问题仍然存在，我在日志文件中看不到异常。

Answer 1

1.你必须使用slf4j + logback，看来你正在使用java utillogging2. try catch异常并记录错误，否则logback无法捕获异常

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class DemoApplication {

    private static final Logger logger = LoggerFactory.getLogger("DEMO");

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);

        logger.info("main called");
        try {
            throw new IllegalArgumentException("This is a test");
        } catch(Exception e) {
            logger.error("", e);
        }
    }
}