Carsten Rohde created MDEP-833:
----------------------------------

             Summary: dependency:properties parallel build NPE
                 Key: MDEP-833
                 URL: https://issues.apache.org/jira/browse/MDEP-833
             Project: Maven Dependency Plugin
          Issue Type: Bug
          Components: properties
    Affects Versions: 3.3.0
         Environment: Windows 10, OpenJDK 8, Maven 3.8.6
            Reporter: Carsten Rohde


In a huge multimodule project, I get an NPE when building in parallel (see 
stacktrace below). I've encountered a similar problem with the Antrun-Plugin 
before (see stacktrace below) which I was able to work around by attaching the 
execution to a later phase.

The NPEs happen when accessing artifact#getFile which seems not to be present 
in early phases of parallel builds, so maybe this problem is down to how maven 
handles parallelism. In my case dependency:properties is attached to its 
default phase {{initialize}}

dependency:properties

 
{code:java}
project.getProperties().setProperty( artifact.getDependencyConflictId(),        
                                  artifact.getFile().getAbsolutePath() ); {code}
[Permalink 
dependency-plugin|https://github.com/apache/maven-dependency-plugin/blob/673ef9f4d6d0119ea6dcf1b61134d1277720d3b5/src/main/java/org/apache/maven/plugins/dependency/PropertiesMojo.java#L81-L82]

 

[Permalink 
antrun-plugin|https://github.com/apache/maven-antrun-plugin/blob/5ec09d7b6b1b64c26d05367837d60f98ed4e0db4/src/main/java/org/apache/maven/plugins/antrun/AntRunMojo.java#L474]

 

Is there any workaround, I could try?

 

 

*Stacktrace dependency:properties*

 
{code:java}
Execution default of goal 
org.apache.maven.plugins:maven-dependency-plugin:3.3.0:properties failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:375)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions 
(MojoExecutor.java:508)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:345)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default 
of goal org.apache.maven.plugins:maven-dependency-plugin:3.3.0:properties 
failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions 
(MojoExecutor.java:508)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:345)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
Caused by: java.lang.NullPointerException
    at org.apache.maven.plugins.dependency.PropertiesMojo.execute 
(PropertiesMojo.java:82)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions 
(MojoExecutor.java:508)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:345)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748) {code}
 

 

*Stacktrace antrun:run*

 
{code:java}
 Error executing Ant tasks: null
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:375)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error executing Ant 
tasks: null
    at org.apache.maven.plugins.antrun.AntRunMojo.execute (AntRunMojo.java:323)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
Caused by: java.lang.NullPointerException
    at org.apache.maven.plugins.antrun.AntRunMojo.copyProperties 
(AntRunMojo.java:474)
    at org.apache.maven.plugins.antrun.AntRunMojo.execute (AntRunMojo.java:294)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo 
(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 
(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute 
(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute 
(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject 
(LifecycleModuleBuilder.java:117)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:210)
    at 
org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call
 (MultiThreadedBuilder.java:195)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker 
(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run 
(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748) {code}
 

 

 

 



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