[tycho-user] NullPointerException at MirrorRequest.collectStats

[Grégoire Dupé <gdupe@xxxxxxxxxxxxxxxx>]

Hello,

When I try to build MoDisco [1], I get a NullPointerException at MirrorRequest.collectStats.

Google didn't help me. By reading the source code [2], I understand that "this.transport" is null, but I don't know why. Could anybody explain how to get more debug information?

Here is the full stack trace:

[INFO] o.h.m.e.h.MavenExecutionResultHandler - Build failed with exception(s)
[INFO] o.h.m.e.h.MavenExecutionResultHandler - [1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository (default-assemble-repository) on project org.eclipse.modisco.doc.api.report.eclipsepackage: Execution default-assemble-repository of goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository failed.
[DEBUG] Closing connection to remote
[ERROR] Failed to execute goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository (default-assemble-repository) on project org.eclipse.modisco.doc.api.report.eclipsepackage: Execution default-assemble-repository of goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository (default-assemble-repository) on project org.eclipse.modisco.doc.api.report.eclipsepackage: Execution default-assemble-repository of goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository failed.
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-assemble-repository of goal org.eclipse.tycho:tycho-p2-repository-plugin:0.16.0:assemble-repository failed.
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
	... 19 more
Caused by: java.lang.NullPointerException
	at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.collectStats(MirrorRequest.java:230)
	at org.eclipse.equinox.internal.p2.artifact.repository.MirrorRequest.transfer(MirrorRequest.java:215)
	at org.eclipse.equinox.internal.p2.artifact.repository.RawMirrorRequest.perform(RawMirrorRequest.java:52)
	at org.eclipse.equinox.p2.internal.repository.mirroring.Mirroring.downloadArtifact(Mirroring.java:203)
	at org.eclipse.equinox.p2.internal.repository.mirroring.Mirroring.mirror(Mirroring.java:158)
	at org.eclipse.equinox.p2.internal.repository.mirroring.Mirroring.run(Mirroring.java:106)
	at org.eclipse.equinox.p2.internal.repository.tools.MirrorApplication.mirrorArtifacts(MirrorApplication.java:207)
	at org.eclipse.equinox.p2.internal.repository.tools.MirrorApplication.run(MirrorApplication.java:189)
	at org.eclipse.tycho.p2.tools.mirroring.MirrorApplicationServiceImpl.mirrorReactor(MirrorApplicationServiceImpl.java:140)
	at org.eclipse.tycho.plugins.p2.repository.AssembleRepositoryMojo.execute(AssembleRepositoryMojo.java:92)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
	... 20 more


[1] https://hudson.eclipse.org/hudson/me/my-views/view/EMF%20Facet%20and%20MoDisco/job/modisco-nightly-maintenance/73/console
[2] http://git.eclipse.org/c/equinox/rt.equinox.p2.git/tree/bundles/org.eclipse.equinox.p2.artifact.repository/src/org/eclipse/equinox/internal/p2/artifact/repository/MirrorRequest.java?id=04549b1dd45c808514d61d55185d55a7a8b7fb63&h=R3_4_maintenance

Regards,
Grégoire Dupé