标签:ice app dal 文件 导致 启动 erro read log4j
maven项目中因为引入的有log4j2 在打成jar包 通过java -cp 命令运行时,引起下面这段错误,后果就是log日志无法打印。
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 Reconfiguration failed: No configuration found for ‘5c647e05‘ at ‘null‘ in ‘null‘
先分析原因:
log4j2 是采用的插件式编程,当log4j2包编译时,或者含有log4j2插件的包编译时,会将需要加载的插件信息放在META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat这个文件中(包括官方logj42的原生插件),然后项目启动的时候,log4j2会在各个jar包的META-INF目录下扫描这个插件信息文件,然后去加载插件。但是当项目被打成一个jar包时,如果两个不同的jar包中都有Log4j2Plugins.dat 这个文件,就会出现问题,其中一个文件会被另一个覆盖,导致项目启动的时候有一个文件中的插件不能被正常加载,导致报错。
所以解决办法有两种,第一种是在项目编译打包时排除这个文件,第二种是合并这些文件。
我在尝试第二种时该问题还是没能解决,但是用第一种就解决了。
下面分别说下两种解决办法:
一:
在打包插件中maven-shade-plugin 排除相关这个Log4j2Plugins.dat即可
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
<!-- 排除log4j2插件文件 解决在打成jar包运行时日志无法打印的问题 https://stackoverflow.com/questions/34945438/log4j2-configuration-not-found-when-running-standalone-application-built-by-shad-->
<exclude>**/Log4j2Plugins.dat</exclude>
</excludes>
</filter>
</filters>
<artifactSet>
<includes>
<include>*:*</include>
</includes>
</artifactSet>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
二:添加个transformer合并Log4j2Plugins.dat文件即可,需要一个第三方的转换器maven-shade-plugin.log4j2-cachefile-transformer 。本人在尝试该方法时还是未能解决以上问题,估计是哪里没配置好,该方法不行的话,建议使用第一种,简单方便。
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
<finalName>${artifactId}-${env}-${version}</finalName>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
<transformer implementation="com.github.edwgiz.mavenShadePlugin.log4j2CacheTransformer.PluginsCacheFileTransformer" />
</transformers>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>com.github.edwgiz</groupId>
<artifactId>maven-shade-plugin.log4j2-cachefile-transformer</artifactId>
<version>2.6.1</version>
</dependency>
</dependencies>
</plugin>
标签:ice app dal 文件 导致 启动 erro read log4j
原文地址:https://www.cnblogs.com/cekaigongchengshi/p/12874829.html