运行由 shade 插件构建的独立应用程序时找不到 Log4j2 配置

Question

我有一个应用程序，当我从 maven log4j2 运行运行它时：

mvn exec:java -Dexec.args=...

但是当我运行将 jar 作为独立应用程序时，它显示错误：

java -jar

日志：

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 No log4j2 configuration file found. Using default configuration: logging only errors to the console.
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.

我不明白这个错误。它显示找不到 log4j2 配置文件，但也抱怨配置文件中可能存在的某些格式

我的配置是：

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="off">
    <Appenders>
        <Console name="console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d [%t] %-5p - %-26.26c{1} - %m\n" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="console" />
        </Root>

        <Logger name="my.package" level="DEBUG" /> 

    </Loggers>
</Configuration>

并且位于jar文件的根目录下。

更新

jar 由 maven shade 插件创建：

        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>

所以它包含所有必要的库（大约 23 MB），当我运行这个 jar 我只需要指定参数

Answer 1

好的，我发现这个 issue 关于这个问题。

简而言之，当使用maven shade插件将应用程序类打包到uber jar中时，就会出现问题。虽然对于 log4j2 版本 2.8.1 修复仍然悬而未决，但建议的解决方法是使用阴影插件的额外配置设置更新 maven pom.xml，如下所示：

    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

        . . . . .

        <build>
            . . . . . 
            <plugins>
                . . . . . 
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-shade-plugin</artifactId>
                    <version>2.4.1</version>
                    <configuration>
                        <filters>
                            <filter>
                                <artifact>*:*</artifact>
                                <excludes>
                                    <exclude>META-INF/*.SF</exclude>
                                    <exclude>META-INF/*.DSA</exclude>
                                    <exclude>META-INF/*.RSA</exclude>
                                </excludes>
                            </filter>
                        </filters>
                        <transformers>
                            <transformer
                                    implementation="com.github.edwgiz.mavenShadePlugin.log4j2CacheTransformer.PluginsCacheFileTransformer"/>
                        </transformers>
                    </configuration>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>shade</goal>
                            </goals>
                        </execution>
                    </executions>
                    <dependencies>
                        <dependency>
                            <groupId>com.github.edwgiz</groupId>
                            <artifactId>maven-shade-plugin.log4j2-cachefile-transformer</artifactId>
                            <version>2.1</version>
                        </dependency>
                    </dependencies>
                </plugin>
                . . . . . 
            </plugins>
        . . . . . 
        </build>
        . . . . . 
        <pluginRepositories>
            <pluginRepository>
                <id>oss.sonatype.org</id>
                <name>OSS Sonatype Staging</name>
                <url>https://oss.sonatype.org/content/groups/staging</url>
            </pluginRepository>
        </pluginRepositories>      
        . . . . . 
    </project>

Answer 2

pom.file的完整示例请参考这里。

除了@hudi给出的答案，我们需要在插件中添加依赖项以进行转换。

<build>
    <sourceDirectory>src/main/java</sourceDirectory>
    <resources>
        <resource>
            <directory>src/main/resources</directory>               
        </resource>
    </resources>
    <plugins>
    <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>2.4.1</version>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>shade</goal>
        </goals>
        <configuration>
          <transformers>
            <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                <manifestEntries>
                    <Main-Class>com.auto.facade.RunMain</Main-Class>
                    <Build-Number>123</Build-Number>
                </manifestEntries>
            </transformer>
            <transformer implementation="com.github.edwgiz.mavenShadePlugin.log4j2CacheTransformer.PluginsCacheFileTransformer" />                
          </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>
    <dependencies>
                <dependency>
                    <groupId>com.github.edwgiz</groupId>
                    <artifactId>maven-shade-plugin.log4j2-cachefile-transformer</artifactId>
                    <version>2.6.1</version>
                </dependency>
            </dependencies>
  </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
</build>

Answer 3

<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>project-name-product-1.0.0-SNAPSHOT</finalName>
                        <transformers>
                            <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                <mainClass>your.main.classname</mainClass>
                            </transformer>
                            <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>
                            <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.tooling</resource>
                            </transformer>
                            <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.ComponentsXmlResourceTransformer"/>
                            <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>

Answer 4

我通过在运行配置中添加以下行解决了这个问题。

-Dlog4j.configurationFile=C:\Users\aaa\Desktop\deploy\bin\log4j2.xml

我的 Log4j 版本是

2.12.1

运行 由 shade 插件构建的独立应用程序时找不到 Log4j2 配置

Log4j2 configuration not found when running standalone application built by shade plugin

java

log4j2

maven-shade-plugin

运行由 shade 插件构建的独立应用程序时找不到 Log4j2 配置