Logback 创建日志文件但不向其中写入任何内容

Question

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我一直在尝试设置一个通用的 logback 配置：一个附加到控制台，另一个附加到文件。 控制台 appender 似乎工作正常，但文件 appender 不是。 启动时只创建一个空的日志文件，仅此而已。 我开始设置一个 Rolling File Appender，然后让它变得更简单到一个基本的 File Appender 并且具有相同的行为。 我使用 maven 构建应用程序，应用程序使用 spring（不是引导）。 所以我不确定我是否缺少配置...

启动时的 logback 输出（调试设置为 true）：

20:10:26,380 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
20:10:26,505 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT]
20:10:26,520 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
20:10:26,653 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.FileAppender]
20:10:26,663 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE]
20:10:26,666 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
20:10:26,668 |-INFO in ch.qos.logback.core.FileAppender[FILE] - File property is set to [./logs/mylog.log]
20:10:26,674 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
20:10:26,675 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT]
20:10:26,676 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT]
20:10:26,676 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
20:10:26,678 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@17550481 - Registering current configuration as safe fallback point

logback.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration>
<configuration debug="true">
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} [%file:%line] - %msg%n</pattern>
    </encoder>
  </appender>

<appender name="FILE" class="ch.qos.logback.core.FileAppender">
  <file>./logs/mylog.log</file>
  <immediateFlush>true</immediateFlush>
  <encoder>
    <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} [%file:%line] - %msg%n</pattern>
  </encoder>
</appender>

  <!-- My first sad attempt with a file appender -->
  <!--<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>./logs/mylog.log</file>
    <immediateFlush>true</immediateFlush>
    <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
      <fileNamePattern>./logs/mylog-%d.%i.zip</fileNamePattern>
      <maxFileSize>200MB</maxFileSize>
      <maxHistory>60</maxHistory>
      <totalSizeCap>20GB</totalSizeCap>
    </rollingPolicy>

    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} [%file:%line] - %msg%n</pattern>
    </encoder>
  </appender>  -->

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

</configuration>

我的 pom.xml 文件中的一些相关依赖项

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.3.7.RELEASE</version>
        <exclusions>
          <exclusion>
            <artifactId>commons-logging</artifactId>
            <groupId>commons-logging</groupId>
          </exclusion>
        </exclusions>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.3.7.RELEASE</version>
        <exclusions>
          <exclusion>
            <artifactId>commons-logging</artifactId>
            <groupId>commons-logging</groupId>
          </exclusion>
        </exclusions>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
        <version>1.4.3.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jms</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework.retry</groupId>
        <artifactId>spring-retry</artifactId>
        <version>1.2.0.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>4.3.7.RELEASE</version>
      </dependency>
<dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.25</version>
      </dependency>
      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>1.7.25</version>
      </dependency>
      <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
      </dependency>

我一直在查看关于 stackoverflow 的其他 logback 问题，大多数似乎指出 logback.xml 文件中缺少一些配置，但这里似乎并非如此。

编辑：我试图修改控制台附加程序，只是为了尝试隔离问题，如：

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} DEBUG [%thread] %-5level %logger{36} [%file:%line] - %msg%n</pattern>
    </encoder>
  </appender>

像这样修改编码器应该在每一行中添加 DEBUG 词，但我没有看到应用了这样的更改。 因此，似乎仍在使用 BasicConfiguration（尽管找到了日志中显示的配置）。

编辑 2：加载 Spring 应用程序上下文后，日志配置设置回 null。

15:12:24.590 [main] INFO  com.my.package.SomeClass [SomeCodeFile.java:83] - Logback used 'null' as the configuration file.
15:12:24.591 [main] INFO  com.my.package.SomeClass [SomeCodeFile.java:85] - Root logger level is: INFO

任何想法将不胜感激！ 谢谢！

Answer 1

尝试使用以下参考 logback 配置

<appender name="DebugFileAppender"
                class="ch.qos.logback.core.FileAppender">
    <file>${LOG_PATH}/log.debug</file>
    <filter class="ch.qos.logback.classic.filter.LevelFilter">
        <level>DEBUG</level>
        <onMatch>ACCEPT</onMatch>
        <onMismatch>DENY</onMismatch>
    </filter>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
    <Pattern> %d{dd-MM-yyyy HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M - %msg%n
    </Pattern>
  </encoder>
</appender>

像这样，您可以定义要使用的 appender

<logger name="debugAppender" level="debug" additivity="false">
        <appender-ref ref="DebugFileAppender" />
</logger>

Answer 2

好的，我刚刚发现作为我无法触及的库的一部分，有一个部分从特定文件加载了 logback 上下文。 由于没有找到，它在加载 spring 应用程序上下文之前删除了一组。