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Alexander Ashitkin commented on MJAR-192: ----------------------------------------- @Kristian, will do. @Michael the issue happens 1-2 times a day (~60 builds daily). Single threaded build is ok. Unfortunately i cannot provide my project and reproducing case for concurrency issue is complex. The best i can do is to try better debug logging with patched maven. thank you > Sporadic NPE in maven-jar-plugin:2.5:jar > ---------------------------------------- > > Key: MJAR-192 > URL: https://jira.codehaus.org/browse/MJAR-192 > Project: Maven JAR Plugin > Issue Type: Bug > Affects Versions: 2.5 > Environment: win 2008 server x64 java 8u25 maven 3.2.5 > Reporter: Alexander Ashitkin > > Strange npe at jar goal: > {code} > 16:41:50 [ERROR] Failed to execute goal > org.apache.maven.plugins:maven-jar-plugin:2.5:jar (default-jar) on project > my-model: Error assembling JAR: NullPointerException -> [Help 1] > 16:41:50 org.apache.maven.lifecycle.LifecycleExecutionException: Failed to > execute goal org.apache.maven.plugins:maven-jar-plugin:2.5:jar (default-jar) > on project my-model: Error assembling JAR > 16:41:50 at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216) > 16:41:50 at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) > 16:41:50 at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) > 16:41:50 at > org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116) > 16:41:50 at > org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:188) > 16:41:50 at > org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:184) > 16:41:50 at java.util.concurrent.FutureTask.run(FutureTask.java:266) > 16:41:50 at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) > 16:41:50 at java.util.concurrent.FutureTask.run(FutureTask.java:266) > 16:41:50 at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > 16:41:50 at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > 16:41:50 at java.lang.Thread.run(Thread.java:745) > 16:41:50 Caused by: org.apache.maven.plugin.MojoExecutionException: Error > assembling JAR > 16:41:50 at > org.apache.maven.plugin.jar.AbstractJarMojo.createArchive(AbstractJarMojo.java:233) > 16:41:50 at > org.apache.maven.plugin.jar.AbstractJarMojo.execute(AbstractJarMojo.java:251) > 16:41:50 at > org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132) > 16:41:50 at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208) > 16:41:50 ... 11 more > 16:41:50 Caused by: java.lang.NullPointerException > 16:41:50 at > org.apache.maven.project.MavenProject.getArtifacts(MavenProject.java:715) > 16:41:50 at > org.apache.maven.project.MavenProject.deepCopy(MavenProject.java:1218) > 16:41:50 at > org.apache.maven.project.MavenProject.<init>(MavenProject.java:197) > 16:41:50 at > org.apache.maven.archiver.MavenArchiver.createArchive(MavenArchiver.java:501) > 16:41:50 at > org.apache.maven.plugin.jar.AbstractJarMojo.createArchive(AbstractJarMojo.java:226) > 16:41:50 ... 14 more > {code} -- This message was sent by Atlassian JIRA (v6.1.6#6162)