Ben DeLillo created MWAR-439:
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Summary: 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
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 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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