[
http://jira.codehaus.org/browse/CONTINUUM-2203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brett Porter updated CONTINUUM-2203:
------------------------------------
Fix Version/s: (was: 1.3.3)
> Parallel builds sporadically failing
> ------------------------------------
>
> Key: CONTINUUM-2203
> URL: http://jira.codehaus.org/browse/CONTINUUM-2203
> Project: Continuum
> Issue Type: Bug
> Affects Versions: 1.3.3
> Environment: Maven version: 2.0.10
> Java version: 1.4.2_19
> OS name: "linux" version: "2.6.27.21" arch: "i386" Family: "unix"
> glassfish-v2.1-b60e-linux-ml
> Reporter: Christian Schulte
> Attachments: Build Definitions.png
>
>
> There seem to be problems with parallel builds. Sometimes builds fail and
> continuum then seems to have lost track of them - that is - there is no state
> icon shown in the projectgroup overview page for these builds. Currently I
> can only provide some stacktraces from the logs and from the build output.
> {code}
> org.apache.maven.continuum.notification.NotificationException: INTERNAL
> ERROR: The current build wasn't the first in the build list. Current build:
> '305', first build: '306
> '.
> at
> org.apache.maven.continuum.notification.AbstractContinuumNotifier.getPreviousBuild(AbstractContinuumNotifier.java:294)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:296)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:284)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:196)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:151)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispatcher.java:97)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:240)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:192)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> {code}
> org.apache.maven.continuum.notification.NotificationException: INTERNAL
> ERROR: The current build wasn't the first in the build list. Current build:
> '315', first build: '316'.
> at
> org.apache.maven.continuum.notification.AbstractContinuumNotifier.getPreviousBuild(AbstractContinuumNotifier.java:294)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:296)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:284)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:196)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:151)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispatcher.java:97)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:240)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:192)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> {code}
> org.apache.maven.continuum.notification.NotificationException: INTERNAL
> ERROR: The current build wasn't the first in the build list. Current build:
> '325', first build: '326'.
> at
> org.apache.maven.continuum.notification.AbstractContinuumNotifier.getPreviousBuild(AbstractContinuumNotifier.java:294)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:296)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:284)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:196)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:151)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispatcher.java:97)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:240)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:192)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> {code}
> org.apache.maven.continuum.notification.NotificationException: INTERNAL
> ERROR: The current build wasn't the first in the build list. Current build:
> '344', first build: '346'.
> at
> org.apache.maven.continuum.notification.AbstractContinuumNotifier.getPreviousBuild(AbstractContinuumNotifier.java:294)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:296)
> at
> org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:284)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:196)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDispatcher.java:151)
> at
> org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispatcher.java:97)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:240)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:192)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> The following exceptions seem to be the reason why continuum refuses to
> schedule such failed builds automatically. I need to build those projects
> manually once they failed to make things work again.
> {code}
> org.codehaus.plexus.taskqueue.execution.TaskExecutionException: Can't
> determine if the project should build or not
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.shouldBuild(DefaultBuildController.java:534)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:143)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.NullPointerException
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.shouldBuild(DefaultBuildController.java:527)
> ... 8 more
> {code}
> {code}
> org.codehaus.plexus.taskqueue.execution.TaskExecutionException: Can't
> determine if the project should build or not
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.shouldBuild(DefaultBuildController.java:534)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:143)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.NullPointerException
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.shouldBuild(DefaultBuildController.java:527)
> ... 8 more
> {code}
> This happened once when running 'clean site-deploy'. Scary.
> {code}
> [INFO] Generating "Dependencies" report.
> #
> # An unexpected error has been detected by HotSpot Virtual Machine:
> #
> # SIGBUS (0x7) at pc=0xb79adfb0, pid=6143, tid=3085551280
> #
> # Java VM: Java HotSpot(TM) Client VM (1.4.2_19-b04 mixed mode)
> # Problematic frame:
> # C [libzip.so+0xafb0]
> #
> # An error report file with more information is saved as hs_err_pid6143.log
> #
> # If you would like to submit a bug report, please visit:
> # http://java.sun.com/webapps/bugreport/crash.jsp
> #
> {code}
> This shows a failing javadoc report in the build output due to a missing
> directory. The only reason I think this could happen is when another build
> was running in parallel and did a 'clean' while that javadoc report was still
> running. For all project groups I setup two build definitions 'clean deploy'
> and 'clean site-deploy' at group level. 'clean deploy' with a hourly
> schedule, 'clean site-deploy' with a weekly schedule. Just today the weekly
> schedule seems to have triggered and was run in parallel with the 'clean
> deploy' definition. Just guessing, though.
> {code}
> [INFO] Error during page generation
> Embedded error: Error rendering Maven report: Exit code: 1 - javadoc: error -
> Unable to create directory
> /var/spool/continuum/working-directory/134/target/site/apidocs/some/package/
> com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
> at
> com.sun.tools.doclets.internal.toolkit.util.DirectoryManager.createDirectory(DirectoryManager.java:263)
> at
> com.sun.tools.doclets.internal.toolkit.util.Util.genWriter(Util.java:576)
> at
> com.sun.tools.doclets.formats.html.markup.HtmlWriter.<init>(HtmlWriter.java:61)
> at
> com.sun.tools.doclets.formats.html.markup.HtmlDocWriter.<init>(HtmlDocWriter.java:47)
> at
> com.sun.tools.doclets.formats.html.HtmlDocletWriter.<init>(HtmlDocletWriter.java:95)
> at
> com.sun.tools.doclets.formats.html.SubWriterHolderWriter.<init>(SubWriterHolderWriter.java:40)
> at
> com.sun.tools.doclets.formats.html.ClassWriterImpl.<init>(ClassWriterImpl.java:49)
> at
> com.sun.tools.doclets.formats.html.WriterFactoryImpl.getClassWriter(WriterFactoryImpl.java:64)
> at
> com.sun.tools.doclets.internal.toolkit.builders.BuilderFactory.getClassBuilder(BuilderFactory.java:83)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:152)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:164)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
> at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
> 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 com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
> at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
> at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
> at com.sun.tools.javadoc.Start.begin(Start.java:128)
> at com.sun.tools.javadoc.Main.execute(Main.java:41)
> at com.sun.tools.javadoc.Main.main(Main.java:31)
> com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:159)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:164)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
> at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
> 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 com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
> at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
> at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
> at com.sun.tools.javadoc.Start.begin(Start.java:128)
> at com.sun.tools.javadoc.Main.execute(Main.java:41)
> at com.sun.tools.javadoc.Main.main(Main.java:31)
> Command line was:/usr/lib/jvm/java-6-sun-1.6.0.12/bin/javadoc @options
> @packages
> {code}
> Same with this.
> {code}
> [INFO] Error uploading site
> Embedded error: Error performing commands for file transfer
> Exit code: 0 - error: cannot delete old xref-test/overview-frame.html
> error: cannot delete old xref-test/some/package/package-frame.html
> error: cannot delete old xref/overview-frame.html
> error: cannot delete old apidocs/allclasses-noframe.html
> error: cannot delete old apidocs/src-html/some/package/SomeFile.html
> error: cannot delete old apidocs/resources/inherit.gif
> {code}
> {code}
> [INFO] Error during page generation
> Embedded error: Error rendering Maven report: Exit code: 1 - javadoc: error -
> Unable to create directory
> /var/spool/continuum/working-directory/139/target/site/apidocs/some/package/
> com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
> at
> com.sun.tools.doclets.internal.toolkit.util.DirectoryManager.createDirectory(DirectoryManager.java:263)
> at
> com.sun.tools.doclets.internal.toolkit.util.Util.genWriter(Util.java:576)
> at
> com.sun.tools.doclets.formats.html.markup.HtmlWriter.<init>(HtmlWriter.java:61)
> at
> com.sun.tools.doclets.formats.html.markup.HtmlDocWriter.<init>(HtmlDocWriter.java:47)
> at
> com.sun.tools.doclets.formats.html.HtmlDocletWriter.<init>(HtmlDocletWriter.java:95)
> at
> com.sun.tools.doclets.formats.html.SubWriterHolderWriter.<init>(SubWriterHolderWriter.java:40)
> at
> com.sun.tools.doclets.formats.html.ClassWriterImpl.<init>(ClassWriterImpl.java:49)
> at
> com.sun.tools.doclets.formats.html.WriterFactoryImpl.getClassWriter(WriterFactoryImpl.java:64)
> at
> com.sun.tools.doclets.internal.toolkit.builders.BuilderFactory.getClassBuilder(BuilderFactory.java:83)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:152)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:164)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
> at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
> 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 com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
> at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
> at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
> at com.sun.tools.javadoc.Start.begin(Start.java:128)
> at com.sun.tools.javadoc.Main.execute(Main.java:41)
> at com.sun.tools.javadoc.Main.main(Main.java:31)
> com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:159)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:164)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
> at
> com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
> at
> com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
> at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
> 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 com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
> at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
> at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
> at com.sun.tools.javadoc.Start.begin(Start.java:128)
> at com.sun.tools.javadoc.Main.execute(Main.java:41)
> at com.sun.tools.javadoc.Main.main(Main.java:31)
> Command line was:/usr/lib/jvm/java-6-sun-1.6.0.12/bin/javadoc @options
> @packages
> {code}
> Then there is this failing build. What is special with this build is that it
> downloaded various dependencies which it shouldn't have done. Maybe the local
> repository got purged automatically in between ? It's downloading releases
> and I think purging does not touch release artifacts ?
> {code}
> [ERROR] FATAL ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] org/apache/maven/model/PluginManagement
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Trace
> java.lang.NoClassDefFoundError: org/apache/maven/model/PluginManagement
> at
> org.apache.maven.report.projectinfo.PluginManagementReport.canGenerateReport(PluginManagementReport.java:106)
> at
> org.apache.maven.plugins.site.AbstractSiteRenderingMojo.filterReports(AbstractSiteRenderingMojo.java:177)
> at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:81)
> at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:453)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:559)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:500)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:479)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:331)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:292)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:301)
> 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:324)
> at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
> at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
> at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
> at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
> {code}
> No idea about this one. Seems some archive file was invalid. So it could be
> some build was running in parallel and was updating some jar file when this
> failing build was trying to use it.
> {code}
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] BUILD ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] invalid block type
> [INFO]
> ------------------------------------------------------------------------
> {code}
> This one was shown as the build output for one of those failing builds.
> {code}
> java.lang.NullPointerException
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.shouldBuild(DefaultBuildController.java:527)
> at
> org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:143)
> at
> org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:48)
> at
> org.apache.continuum.taskqueueexecutor.ParallelBuildsThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ParallelBuildsThreadedTaskQueueExecutor.java:120)
> at
> edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
> at
> edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
> at
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> I have setup two project groups with theire own local repositories. So it
> normally cannot happen that parallel builds are accessing the same local
> repository. The failing builds are all in the same group. It really seems
> that things are running in parallel which shouldn't. Let me know if you need
> any more information. As said, I cannot reproduce it but it happens regularly
> with builds which have been scheduled automatically.
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