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From "Christian Schlichtherle (JIRA)" <j...@codehaus.org>
Subject [jira] (MNG-5787) Maven 3.3.1 breaks plugins with the SLF4J API on the class path
Date Thu, 26 Mar 2015 15:55:18 GMT

    [ https://jira.codehaus.org/browse/MNG-5787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=365731#comment-365731
] 

Christian Schlichtherle commented on MNG-5787:
----------------------------------------------

Here is an effective work-around: Add the maven-shade-plugin to the plugin POM and make sure
to declare the scope of the maven-plugin-annotations and the maven-plugin-api as provided.
Th maven-shade-plugin creates an Uber JAR for the plugin which includes the slf4j-api. This
runs fine with both Maven 3.3.1 and Maven 3.2.5.

> Maven 3.3.1 breaks plugins with the SLF4J API on the class path
> ---------------------------------------------------------------
>
>                 Key: MNG-5787
>                 URL: https://jira.codehaus.org/browse/MNG-5787
>             Project: Maven
>          Issue Type: Bug
>          Components: Class Loading
>    Affects Versions: 3.3.1
>         Environment: OS X 10.10.2, JDK 1.7.0_76 and JDK 1.8.0_40.
>            Reporter: Christian Schlichtherle
>            Priority: Blocker
>         Attachments: hello-maven-plugin.zip
>
>
> There is a regression when setting up the class path for a plugin in Maven 3.3.1. The
following commands run fine when using Maven 3.2.5 or older:
> {code}
> $ mvn --version
> Apache Maven 3.2.5 (12a6b3acb947671f09b81f49094c53f426d8cea1; 2014-12-14T18:29:23+01:00)
> Maven home: /usr/local/Cellar/maven/3.2.5/libexec
> Java version: 1.8.0_40, vendor: Oracle Corporation
> Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre
> Default locale: de_DE, platform encoding: UTF-8
> OS name: "mac os x", version: "10.10.2", arch: "x86_64", family: "mac"
> $ mvn archetype:generate \
>     -DarchetypeGroupId=net.java.truelicense \
>     -DarchetypeArtifactId=truelicense-maven-archetype \
>     -DarchetypeVersion=2.3.4 \
>     -DgroupId=com.company.product \
>     -DartifactId=product \
>     -Dversion=0.1-SNAPSHOT \
>     -Dpackage=com.company.product \
>     -Dsubject="Product 1"
> [...]
> $ cd project
> $ mvn clean install
> [...]
> {code}
> Note that I have shortened the output using bracketed ellipsis {{\[...\]}}.
> However, when running the same commands using Maven 3.3.1, I get the following output:
> {code}
> $ mvn --version
> Apache Maven 3.3.1 (cab6659f9874fa96462afef40fcf6bc033d58c1c; 2015-03-13T21:10:27+01:00)
> Maven home: /Users/christian/Downloads/apache-maven-3.3.1
> Java version: 1.8.0_40, vendor: Oracle Corporation
> Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_40.jdk/Contents/Home/jre
> Default locale: de_DE, platform encoding: UTF-8
> OS name: "mac os x", version: "10.10.2", arch: "x86_64", family: "mac"
> $ mvn archetype:generate \
>     -DarchetypeGroupId=net.java.truelicense \
>     -DarchetypeArtifactId=truelicense-maven-archetype \
>     -DarchetypeVersion=2.3.4 \
>     -DgroupId=com.company.product \
>     -DartifactId=product \
>     -Dversion=0.1-SNAPSHOT \
>     -Dpackage=com.company.product \
>     -Dsubject="Product 1"
> [...]
> $ cd project
> $ mvn clean install
> [INFO] Scanning for projects...
> [INFO] ------------------------------------------------------------------------
> [INFO] Reactor Build Order:
> [INFO] 
> [INFO] product
> [INFO] keygen
> [INFO] keymgr
> [INFO] keysrv
> [INFO]                                                                         
> [INFO] ------------------------------------------------------------------------
> [INFO] Building product 0.1-SNAPSHOT
> [INFO] ------------------------------------------------------------------------
> [INFO] 
> [INFO] --- maven-clean-plugin:2.6:clean (default-clean) @ product ---
> [INFO] 
> [INFO] --- maven-enforcer-plugin:1.3.1:enforce (enforce-maven) @ product ---
> [INFO] 
> [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ product ---
> [INFO] Installing /Users/christian/sandbox/truelicense/product/pom.xml to /Users/christian/.m2/repository/com/company/product/product/0.1-SNAPSHOT/product-0.1-SNAPSHOT.pom
> [INFO]                                                                         
> [INFO] ------------------------------------------------------------------------
> [INFO] Building keygen 0.1-SNAPSHOT
> [INFO] ------------------------------------------------------------------------
> [INFO] 
> [INFO] --- maven-clean-plugin:2.6:clean (default-clean) @ keygen ---
> [INFO] Deleting /Users/christian/sandbox/truelicense/product/keygen/target
> [INFO] 
> [INFO] --- maven-enforcer-plugin:1.3.1:enforce (enforce-maven) @ keygen ---
> [INFO] 
> [INFO] --- maven-resources-plugin:2.7:resources (default-resources) @ keygen ---
> [INFO] Using 'US-ASCII' encoding to copy filtered resources.
> [INFO] Copying 1 resource
> [INFO] Copying 1 resource
> [INFO] 
> [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ keygen ---
> [INFO] Changes detected - recompiling the module!
> [INFO] Compiling 2 source files to /Users/christian/sandbox/truelicense/product/keygen/target/classes
> [INFO] 
> [INFO] --- truelicense-maven-plugin:2.3.4:obfuscate (default) @ keygen ---
> [INFO] Obfuscating annotated constant string values in /Users/christian/sandbox/truelicense/product/keygen/target/classes.
> [INFO] ------------------------------------------------------------------------
> [INFO] Reactor Summary:
> [INFO] 
> [INFO] product ............................................ SUCCESS [  0.411 s]
> [INFO] keygen ............................................. FAILURE [  1.022 s]
> [INFO] keymgr ............................................. SKIPPED
> [INFO] keysrv ............................................. SKIPPED
> [INFO] ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO] ------------------------------------------------------------------------
> [INFO] Total time: 1.646 s
> [INFO] Finished at: 2015-03-18T19:31:46+01:00
> [INFO] Final Memory: 15M/245M
> [INFO] ------------------------------------------------------------------------
> [ERROR] Failed to execute goal net.java.truelicense:truelicense-maven-plugin:2.3.4:obfuscate
(default) on project keygen: Execution default of goal net.java.truelicense:truelicense-maven-plugin:2.3.4:obfuscate
failed: A required class was missing while executing net.java.truelicense:truelicense-maven-plugin:2.3.4:obfuscate:
org/slf4j/helpers/MarkerIgnoringBase
> [ERROR] -----------------------------------------------------
> [ERROR] realm =    plugin>net.java.truelicense:truelicense-maven-plugin:2.3.4
> [ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
> [ERROR] urls[0] = file:/Users/christian/.m2/repository/net/java/truelicense/truelicense-maven-plugin/2.3.4/truelicense-maven-plugin-2.3.4.jar
> [ERROR] urls[1] = file:/Users/christian/.m2/repository/net/java/truelicense/truelicense-obfuscate/2.3.4/truelicense-obfuscate-2.3.4.jar
> [ERROR] urls[2] = file:/Users/christian/.m2/repository/de/schlichtherle/truezip/truezip-driver-zip/7.7.6/truezip-driver-zip-7.7.6.jar
> [ERROR] urls[3] = file:/Users/christian/.m2/repository/de/schlichtherle/truezip/truezip-swing/7.7.6/truezip-swing-7.7.6.jar
> [ERROR] urls[4] = file:/Users/christian/.m2/repository/org/apache/commons/commons-compress/1.9/commons-compress-1.9.jar
> [ERROR] urls[5] = file:/Users/christian/.m2/repository/de/schlichtherle/truezip/truezip-kernel/7.7.6/truezip-kernel-7.7.6.jar
> [ERROR] urls[6] = file:/Users/christian/.m2/repository/de/schlichtherle/truezip/truezip-file/7.7.6/truezip-file-7.7.6.jar
> [ERROR] urls[7] = file:/Users/christian/.m2/repository/de/schlichtherle/truezip/truezip-driver-file/7.7.6/truezip-driver-file-7.7.6.jar
> [ERROR] urls[8] = file:/Users/christian/.m2/repository/org/ow2/asm/asm-tree/5.0.3/asm-tree-5.0.3.jar
> [ERROR] urls[9] = file:/Users/christian/.m2/repository/org/ow2/asm/asm/5.0.3/asm-5.0.3.jar
> [ERROR] urls[10] = file:/Users/christian/.m2/repository/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
> [ERROR] Number of foreign imports: 1
> [ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
> [ERROR] 
> [ERROR] -----------------------------------------------------: org.slf4j.helpers.MarkerIgnoringBase
> [ERROR] -> [Help 1]
> [ERROR] 
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [ERROR] 
> [ERROR] For more information about the errors and possible solutions, please read the
following articles:
> [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
> [ERROR] 
> [ERROR] After correcting the problems, you can resume the build with the command
> [ERROR]   mvn <goals> -rf :keygen
> {code}
> {{org.slf4j.helpers.MarkerIgnoringBase}} is a class in the SLF4J API. Version 1.7.7 is
a compile dependency of the TrueLicense Maven Plugin, as can be seen at https://repo1.maven.org/maven2/net/java/truelicense/truelicense-maven-plugin/2.3.4/truelicense-maven-plugin-2.3.4.pom
, however it is apparently missing on the class path when building the project with Maven
3.3.1.
> Using a 1.7 JDK makes no difference, too.



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