在log4j2配置中使用TimeBasedTriggering策略

Question

我正在尝试将基于时间的触发策略与log4j-2.13一起使用。2，它与spring boot 2.3一起嵌入。0.0释放（spring-boot-started-log4j2）。预期的功能是每天创建一个日志文件。

我的配置文件如下所示：

appender.rolling.type = RollingFile
appender.rolling.name = fileAppender
appender.rolling.fileName = ${basePath}/log-${date:yyyyMMdd}.log
appender.rolling.filePattern = ${basePath}/log-${date:yyyyMMdd}-%i.log
appender.rolling.layout.type = PatternLayout
appender.rolling.layout.pattern = [%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n
appender.rolling.policies.type = Policies
appender.rolling.policies.time.type = TimeBasedTriggeringPolicy
appender.rolling.policies.time.interval = 1
appender.rolling.policies.time.modulate = true

但是，在启动应用程序时，会引发以下异常：

2020-05-28 23:39:07,991 main ERROR Could not create plugin of type class org.apache.logging.log4j.core.appender.RollingFileAppender for element RollingFile: java.lang.IllegalStateException: Pattern does not contain a date java.lang.IllegalStateException: Pattern does not contain a date
    at org.apache.logging.log4j.core.appender.rolling.PatternProcessor.getNextTime(PatternProcessor.java:154)
    at org.apache.logging.log4j.core.appender.rolling.TimeBasedTriggeringPolicy.initialize(TimeBasedTriggeringPolicy.java:117)
    at org.apache.logging.log4j.core.appender.rolling.CompositeTriggeringPolicy.initialize(CompositeTriggeringPolicy.java:54)
    at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.initialize(RollingFileManager.java:158)
    at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:153)
    at org.apache.logging.log4j.core.appender.RollingFileAppender$Builder.build(RollingFileAppender.java:62)
    at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:1002)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:942)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:934)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:552)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:241)
    at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:288)
    at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:618)
    at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:295)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:240)
    at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:159)
    at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:131)
    at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:101)
    at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:188)

如果我改变文件模式：

appender.rolling.fileName = ${basePath}/log-%d{yyyyMMdd}.log
appender.rolling.filePattern = ${basePath}/log-%d{yyyyMMdd}-%i.log

不再引发异常，但文件名为“log-%d{yyyyMMdd}.log”，而不是“log-20200528.log”（例如）。

我应该如何指定filePattern属性以实现预期的行为（每天生成一个日志文件，文件名中包含当前日期）？

Answer 1

为了实现预期行为，似乎需要将两种方法结合起来：

appender.rolling.fileName = ${basePath}/log-${date:yyyyMMdd}.log
appender.rolling.filePattern = ${basePath}log-%d{yyyyMMdd}-%i.log