本文介绍了log4j2错误StatusLogger无法识别的转换说明符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我在intellij Idea中运行main方法时，我的项目中有log4j2，它可以正确打印日志.
I have log4j2 in my project when I run main method in intellij Idea ,it correct to print log.
当我使用maven-shade-plugin包项目来jar文件，并将jar作为独立应用程序运行时，它显示错误:
when i use maven-shade-plugin package project to jar file, and run jar as standalone application it shows error:
控制台输出
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at position 56 in conversion pattern.
pom.xml配置. log4j2.version = 2.10.0，春季启动版本是1.5.9.RELEASE
pom.xml config . log4j2.version = 2.10.0, spring boot version is 1.5.9.RELEASE
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.handlers</resource>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.schemas</resource>
</transformer>
</transformers>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<sourceDirectory>src/main/java</sourceDirectory>
</build>
log4j2.xml配置
log4j2.xml config
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="debug" monitorInterval="30" shutdownHook="disable">
<properties>
<property name="LOG_HOME">/data1/logs</property>
<property name="JOB_NAME">noname</property>
</properties>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%date{yyyy-MM-dd HH:mm:ss} [%t] %level [%logger{36}][%file:%line] %msg%n%throwable"/>
</Console>
<RollingRandomAccessFile name="DetailFile"
fileName="${sys:LOG_HOME}/${sys:JOB_NAME}/detail.log" bufferedIO="false"
filePattern="${sys:LOG_HOME}/${sys:JOB_NAME}/detail.%d{yyyy-MM-dd}-%i.log">
<PatternLayout
pattern="%date{yyyy-MM-dd HH:mm:ss} [%t] %level [%file:%line] %msg%n%throwable"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
<SizeBasedTriggeringPolicy size="500 MB"/>
</Policies>
</RollingRandomAccessFile>
<RollingRandomAccessFile name="error"
fileName="${sys:LOG_HOME}/${sys:JOB_NAME}/error.log" bufferedIO="true"
filePattern="${sys:LOG_HOME}/${sys:JOB_NAME}/error.%d{yyyy-MM-dd}.log">
<PatternLayout
pattern="%date{yyyy-MM-dd HH:mm:ss} [%t] %level [%logger{36}:%line] %msg%n%throwable"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
</Policies>
</RollingRandomAccessFile>
</Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="DetailFile"/>
<AppenderRef level="error" ref="error"/>
</Root>
</Loggers>
</Configuration>
推荐答案
如果依赖项包含log4j2插件，则jar中将包含Log4j2Plugins.dat缓存文件.当Maven阴影插件用于通过Log4j2Plugins.dat文件合并多个jar时，将仅保留一个.如果没有插件定义，则启动时会显示错误. Log4j2问题
If a dependency contains log4j2 plugin, a Log4j2Plugins.dat cache file is included in the jar. When the Maven shade plugin is used to merge multiple jars with a Log4j2Plugins.dat file, only one will survive. Without the plugin definitions, errors are shown on startup. Log4j2 issue
一个解决方案是从阴影jar中排除Log4j2Plugins.dat缓存文件，以便Log4j在启动时扫描插件.为此，在pom中的maven-shade-plugin配置中添加一个过滤器:
One solution for this is excluding Log4j2Plugins.dat cache file from shaded jar so that Log4j scans for plugins on startup. For this, add a filter in maven-shade-plugin configuration in your pom:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>**/Log4j2Plugins.dat</exclude>
</excludes>
</filter>
</filters>
</configuration>
...
</plugin>
另一种解决方案是使用转换插件合并缓存文件特定于log4j版本.
Another solution is to merge the cache files using a transformation plugin which is log4j version specific.
这篇关于log4j2错误StatusLogger无法识别的转换说明符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！