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https://issues.apache.org/jira/browse/MWAR-439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17246082#comment-17246082
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Michael Osipov commented on MWAR-439:
-------------------------------------
Can you bisect between these two versions?
> WAR Plugin 3.3.1 hits NPE when exploding if maven session start time is null
> ----------------------------------------------------------------------------
>
> Key: MWAR-439
> URL: https://issues.apache.org/jira/browse/MWAR-439
> Project: Maven WAR Plugin
> Issue Type: Bug
> Affects Versions: 3.3.1
> Environment: Windows 10
> Eclipse Version: 20200910-1200
> m2e Version: 1.16.1.20200710-1008
> Reporter: Ben DeLillo
> Priority: Major
>
> I don't have a distributable repro case, but I can say that in my
> multi-module project, when the exploded goal is invoked by eclipse and m2e
> the following error occurs:
> {code:java}
> Execution default of goal
> org.apache.maven.plugins:maven-war-plugin:3.3.1:exploded failed.
> (org.apache.maven.plugins:maven-war-plugin:3.3.1:exploded:default:process-resources)
> {code}
> The stack trace for this error is
> {code:java}
> org.apache.maven.plugin.PluginExecutionException: Execution default of goal
> org.apache.maven.plugins:maven-war-plugin:3.3.1:exploded failed. at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:148)
> at
> org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:332)
> at
> org.eclipse.m2e.core.internal.embedder.MavenImpl.lambda$8(MavenImpl.java:1380)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:179)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:114)
> at
> org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1379)
> at
> org.eclipse.m2e.core.project.configurator.MojoExecutionBuildParticipant.build(MojoExecutionBuildParticipant.java:54)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:135)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:169)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$1(MavenBuilder.java:114)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:179)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:114)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$0(MavenBuilder.java:105)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:179)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:153)
> at
> org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:101)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:88)
> at
> org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:197)
> at
> org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:832) at
> org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220)
> at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263)
> at
> org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316) at
> org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at
> org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319)
> at
> org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:371)
> at
> org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:392) at
> org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:515)
> at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)
> at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180)
> at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by:
> java.lang.NullPointerException at
> org.apache.maven.plugins.war.AbstractWarMojo$DefaultWarPackagingContext$1.visitFile(AbstractWarMojo.java:661)
> at
> org.apache.maven.plugins.war.AbstractWarMojo$DefaultWarPackagingContext$1.visitFile(AbstractWarMojo.java:656)
> at java.base/java.nio.file.Files.walkFileTree(Files.java:2804) at
> java.base/java.nio.file.Files.walkFileTree(Files.java:2876) at
> org.apache.maven.plugins.war.AbstractWarMojo$DefaultWarPackagingContext.<init>(AbstractWarMojo.java:655)
> at
> org.apache.maven.plugins.war.AbstractWarMojo.buildWebapp(AbstractWarMojo.java:520)
> at
> org.apache.maven.plugins.war.AbstractWarMojo.buildExplodedWebapp(AbstractWarMojo.java:453)
> at
> org.apache.maven.plugins.war.WarExplodedMojo.execute(WarExplodedMojo.java:43)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
> ... 31 more pom.xml /my-legacy-app line 1753 Maven Build Problem{code}
> I've debugged into AbstractWarMojo.visitFile, and on line 661
> session.getStartTime() is null, so the call to getTime() throws an NPE.
> Attempting to track down why the start time is null led me to MavenImpl, at
> which point I've gotten a bit stuck trying to further track down the issue. I
> think it was pointing to something in MavenExecutionContext, but I'm not
> entirely sure.
> The check against getStartTime was introduced in 3.3.1 so switching to 3.3.0
> unblocks me for now.
>
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