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

问题:

I have application which when I run from maven log4j2 it is working:

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

but when I run jar as standalone application then it shows error:

java -jar 

log:

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. 

I dont understand this error. It shows that log4j2 configuration file is not found but also complain about some format which is probably in configuration file

My configuration is:

and it is located in root directory of jar file.

UPDATE

jar is created by maven shade plugin:

        org.apache.maven.pluginsmaven-shade-plugin

so it contains all necessary libraries (about 23 MB) and when I run this jar I just need to specify arguments

回答1:

ok I found this issue about this problem.

In short, the problem arises when application classes are packaged in uber jar using maven shade plugin. While for log4j2 version 2.8.1 the fix is still pending, the suggested workaround is to update maven pom.xml with extra configuration settings for shade plugin as follow:

              . . . . .                       . . . . .                               . . . . .                  org.apache.maven.pluginsmaven-shade-plugin2.4.1*:*META-INF/*.SFMETA-INF/*.DSAMETA-INF/*.RSApackageshadecom.github.edwgizmaven-shade-plugin.log4j2-cachefile-transformer2.1                 . . . . .                       . . . . .                   . . . . .          oss.sonatype.orgOSS Sonatype Staginghttps://oss.sonatype.org/content/groups/staging               . . . . .      

回答2:

Please refer this for the complete example of pom.file.

In addition to the answer given by @hudi, we need to add dependencies inside the plugin for the transformation.

src/main/javasrc/main/resourcesorg.apache.maven.pluginsmaven-shade-plugin2.4.1packageshadecom.auto.facade.RunMain123*:*META-INF/*.SFMETA-INF/*.DSAMETA-INF/*.RSAcom.github.edwgizmaven-shade-plugin.log4j2-cachefile-transformer2.6.1maven-compiler-plugin3.11.71.7

回答3:

org.apache.maven.pluginsmaven-shade-plugin2.4.3packageshade*:*META-INF/*.SFMETA-INF/*.DSAMETA-INF/*.RSAproject-name-product-1.0.0-SNAPSHOTyour.main.classnameMETA-INF/spring.handlersMETA-INF/spring.schemasMETA-INF/spring.toolingcom.github.edwgizmaven-shade-plugin.log4j2-cachefile-transformer2.6.1

文章来源: Log4j2 configuration not found when running standalone application builded by shade plugin