Olivier Lamy created MENFORCER-468:
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             Summary: Enforcer plugin 3.2.1 concurrency issue
                 Key: MENFORCER-468
                 URL: https://issues.apache.org/jira/browse/MENFORCER-468
             Project: Maven Enforcer Plugin
          Issue Type: Bug
            Reporter: Olivier Lamy


try to build a project such Jetty (https://github.com/eclipse/jetty.project) 
with -Tx
This generate a concurrency issue.
Logs

[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce (enforce-java) on 
project jetty-infinispan-embedded: Execution enforce-java of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce (enforce-java) on 
project jetty-infinispan-embedded: Execution enforce-java of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:306)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution 
enforce-java of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:301)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
Caused by: java.lang.NullPointerException: Cannot invoke 
"org.apache.maven.project.MavenProject.getDependencies()" because "project" is 
null
    at 
org.apache.maven.enforcer.rules.dependency.ResolveUtil.resolveTransitiveDependencies
 (ResolveUtil.java:87)
    at org.apache.maven.enforcer.rules.dependency.RequireUpperBoundDeps.execute 
(RequireUpperBoundDeps.java:100)
    at org.apache.maven.plugins.enforcer.EnforceMojo.executeRuleNew 
(EnforceMojo.java:351)
    at org.apache.maven.plugins.enforcer.EnforceMojo.executeRule 
(EnforceMojo.java:325)
    at org.apache.maven.plugins.enforcer.EnforceMojo.execute 
(EnforceMojo.java:248)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:301)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce 
(ban-javax-servlet-api) on project jetty-infinispan-remote: Execution 
ban-javax-servlet-api of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce 
(ban-javax-servlet-api) on project jetty-infinispan-remote: Execution 
ban-javax-servlet-api of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:306)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution 
ban-javax-servlet-api of goal 
org.apache.maven.plugins:maven-enforcer-plugin:3.2.1:enforce failed: Cannot 
invoke "org.apache.maven.project.MavenProject.getDependencies()" because 
"project" is null
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:301)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
Caused by: java.lang.NullPointerException: Cannot invoke 
"org.apache.maven.project.MavenProject.getDependencies()" because "project" is 
null
    at 
org.apache.maven.enforcer.rules.dependency.ResolveUtil.resolveTransitiveDependencies
 (ResolveUtil.java:87)
    at 
org.apache.maven.enforcer.rules.dependency.BannedDependenciesBase.execute 
(BannedDependenciesBase.java:105)
    at org.apache.maven.enforcer.rules.dependency.BannedDependencies.execute 
(BannedDependencies.java:33)
    at org.apache.maven.plugins.enforcer.EnforceMojo.executeRuleNew 
(EnforceMojo.java:351)
    at org.apache.maven.plugins.enforcer.EnforceMojo.executeRule 
(EnforceMojo.java:325)
    at org.apache.maven.plugins.enforcer.EnforceMojo.execute 
(EnforceMojo.java:248)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:301)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:121)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:539)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)



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