[
https://jira.codehaus.org/browse/MPIR-247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=360619#comment-360619
]
Herve Boutemy commented on MPIR-247:
------------------------------------
in fact, order during execution is not strictly order of the repository, but as
done by Maven core, while merging multiple repos, for example
but even with that, I'm not not sure the API enforces order.
Since we only want the latest, we could simple avoid Collections.sort and
simply iterate over the collection and compare to keep the max.
And while writing this, we should simply use Collections.max() instead of
Collections.sort(): here it is, I try this is the right answer, better than any
previous!
> "Comparison method violates its general contract!" while generating site
> ------------------------------------------------------------------------
>
> Key: MPIR-247
> URL: https://jira.codehaus.org/browse/MPIR-247
> Project: Maven Project Info Reports Plugin
> Issue Type: Bug
> Components: dependency-management
> Affects Versions: 2.4
> Environment: java version "1.7.0_04"
> Java(TM) SE Runtime Environment (build 1.7.0_04-b20)
> Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode)
> maven 3.0.4
> Reporter: Mirek Hankus
> Assignee: Michael Osipov
> Fix For: 2.8
>
> Attachments: MPIR-247.zip
>
>
> While generating site, I'm getting exception as follows.
> {code}
> message : Failed to execute goal
> org.apache.maven.plugins:maven-site-plugin:3.1:site (default-site) on project
> netpr-aggregator: Execution default-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.1:site failed: Comparison method
> violates its general contract!
> cause : Execution default-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.1:site failed: Comparison method
> violates its general contract!
> Stack trace :
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-site-plugin:3.1:site (default-site) on
> project netpr-aggregator: Execution default-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.1:site failed: Comparison method
> violates its general contract!
> 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:320)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
> at
> org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
> at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:158)
> at hudson.maven.Maven3Builder.call(Maven3Builder.java:98)
> at hudson.maven.Maven3Builder.call(Maven3Builder.java:64)
> at hudson.remoting.UserRequest.perform(UserRequest.java:118)
> at hudson.remoting.UserRequest.perform(UserRequest.java:48)
> at hudson.remoting.Request$2.run(Request.java:326)
> at
> hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution
> default-site of goal org.apache.maven.plugins:maven-site-plugin:3.1:site
> failed: Comparison method violates its general contract!
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
> ... 27 more
> Caused by: java.lang.IllegalArgumentException: Comparison method violates its
> general contract!
> at java.util.ComparableTimSort.mergeHi(ComparableTimSort.java:835)
> at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:453)
> at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:376)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:182)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:146)
> at java.util.Arrays.sort(Arrays.java:472)
> at java.util.Collections.sort(Collections.java:155)
> at
> org.apache.maven.report.projectinfo.dependencies.renderer.DependencyManagementRenderer.getDependencyRow(DependencyManagementRenderer.java:228)
> at
> org.apache.maven.report.projectinfo.dependencies.renderer.DependencyManagementRenderer.renderDependenciesForScope(DependencyManagementRenderer.java:204)
> at
> org.apache.maven.report.projectinfo.dependencies.renderer.DependencyManagementRenderer.renderDependenciesForAllScopes(DependencyManagementRenderer.java:153)
> at
> org.apache.maven.report.projectinfo.dependencies.renderer.DependencyManagementRenderer.renderSectionProjectDependencies(DependencyManagementRenderer.java:146)
> at
> org.apache.maven.report.projectinfo.dependencies.renderer.DependencyManagementRenderer.renderBody(DependencyManagementRenderer.java:132)
> at
> org.apache.maven.reporting.AbstractMavenReportRenderer.render(AbstractMavenReportRenderer.java:79)
> at
> org.apache.maven.report.projectinfo.DependencyManagementReport.executeReport(DependencyManagementReport.java:116)
> at
> org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:190)
> at
> org.apache.maven.plugins.site.ReportDocumentRenderer.renderDocument(ReportDocumentRenderer.java:219)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:319)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:135)
> at
> org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:175)
> at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:138)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
> ... 28 more
> {code}
--
This message was sent by Atlassian JIRA
(v6.1.6#6162)
