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https://jira.codehaus.org/browse/MPIR-247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=320276#comment-320276
]
Milos Kleint commented on MPIR-247:
-----------------------------------
related is this netbeans issue:
http://netbeans.org/bugzilla/show_bug.cgi?id=226100
we use maven's ComparableVersion for sorting the nexus indexer results. It
keeps on popping here and there, only with jdk 1.7. It would be probably easier
to dump the dependency info in DependencyManagementRenderer than our code (the
result can contain thousands of items, dependency list will be shorter).
I've never got hold of a reproducible scenario.
> "Comparison method violates its general contract!" while generating site
> ------------------------------------------------------------------------
>
> Key: MPIR-247
> URL: https://jira.codehaus.org/browse/MPIR-247
> Project: Maven 2.x Project Info Reports Plugin
> Issue Type: Bug
> 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
>
> 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}
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