checkstyle and antlr class not found issue

[di...@punchplatform.com]

Hello all,

I face a basic problem on Macos, using the latest mvn, checkstyle and 
antlr maven plugin. My friends do not suffers from this they work on 
linxu pcs. I keep trying to solve this but I dont have much clue.

Note : I do not suffer from the issue with java 11. Only with java 8.

java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)

Apache Maven 3.6.2 (40f52333136460af0dc0d7232c0dc0bcf0d9e117; 
2019-08-27T17:06:16+02:00)
Maven home: /Users/dimi/Bin/apache-maven-3.6.2
Java version: 1.8.0_202, vendor: Oracle Corporation, runtime: 
/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre
Default locale: en_FR, platform encoding: UTF-8
OS name: "mac os x", version: "10.14.3", arch: "x86_64", family: "mac"

Basically I hit :

[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-checkstyle-plugin:3.1.0:check (validate) 
on project punchplatform-lumberjack-lib: Execution validate of goal 
org.apache.maven.plugins:maven-checkstyle-plugin:3.1.0:check failed: A 
required class was missing while executing 
org.apache.maven.plugins:maven-checkstyle-plugin:3.1.0:check: 
antlr/collections/AST


or with -X :

Caused by: java.lang.ClassNotFoundException: antlr.collections.AST
     at 
org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass 
(SelfFirstStrategy.java:50)
     at 
org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass 
(ClassRealm.java:271)
     at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass 
(ClassRealm.java:247)
     at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass 
(ClassRealm.java:239)
     at com.puppycrawl.tools.checkstyle.Checker.<init> (Checker.java:111)
     at 
org.apache.maven.plugins.checkstyle.exec.DefaultCheckstyleExecutor.executeCheckstyle 
(DefaultCheckstyleExecutor.java:115)
     at 
org.apache.maven.plugins.checkstyle.CheckstyleViolationCheckMojo.execute 
(CheckstyleViolationCheckMojo.java:537)
     at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:210)
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:156)
     at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:148)
     at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
     at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:81)
     at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build 
(SingleThreadedBuilder.java:56)
     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute 
(LifecycleStarter.java:128)
     at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
     at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
     at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
     at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
     at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
     at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
     at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke 
(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke 
(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke (Method.java:498)
     at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced 
(Launcher.java:282)
     at org.codehaus.plexus.classworlds.launcher.Launcher.launch 
(Launcher.java:225)
     at 
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode 
(Launcher.java:406)
     at org.codehaus.plexus.classworlds.launcher.Launcher.main 
(Launcher.java:347)
[ERROR]
[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

Thks in advance for any help,
Dimi

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