Exception upon build failure in parallel builds
-----------------------------------------------
Key: MNG-4682
URL: http://jira.codehaus.org/browse/MNG-4682
Project: Maven 2 & 3
Issue Type: Bug
Affects Versions: 3.0-beta-1
Reporter: Kristian Rosenvold
Arnaud Héritier reports seeing the following stacktrace upon (a failing)
parallel build. The build was failing due to some other cause, and the race
condition is due to a problem in the fail logic:
>
> Exception in thread "pool-1-thread-4" java.lang.NullPointerException
> at java.io.DeleteOnExitHook.add(DeleteOnExitHook.java:34)
> at java.io.File.deleteOnExit(File.java:939)
> at
> org.apache.maven.repository.legacy.DefaultWagonManager.getRemoteFile(DefaultWagonManager.java:293)
> at
> org.apache.maven.repository.legacy.DefaultWagonManager.getArtifact(DefaultWagonManager.java:99)
> at
> org.apache.maven.repository.legacy.DefaultWagonManager.getArtifact(DefaultWagonManager.java:150)
> at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:251)
> at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.access$000(DefaultArtifactResolver.java:73)
> at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver$ResolveTask.run(DefaultArtifactResolver.java:689)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:637)
The race condition is believed to be caused because MavenCli calls
System.exit(), even though other parallel-build modules may still be actively
downloading artifacts; the check for isHalted (LifecycleThreadedBuilder line 69
(2x?!)) and similar in Weave mode needs to wait for all started modules to
catch up with the "abort" status.
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